阅读说明：本技术 一种巷道超前支护装置及其使用方法 (Roadway advance support device and using method thereof ) 是由 刘畅 姜鹏飞 杨增强 王子越 韦尧中 于 2020-01-19 设计创作，主要内容包括：本发明涉及巷道掘进领域,公开了一种巷道超前支护装置及其使用方法,包括：若干个依次铰接的滑架；滑架包括：第一滑动结构和第二滑动结构；第一滑动结构包括：第一滑动件和第一钻机组件；第二滑动结构包括：第二滑动件和第二钻机组件；第一钻机组件可滑动地设置在第一滑动件上；第二钻机组件可滑动地设置在第二滑动件上；第一滑动件可滑动地设置在第二滑动件上。本发明提供的巷道超前支护装置,通过向掘进迎头轮廓线前方煤岩体超前钻进钢钎,改良了掘锚机组掘进开挖煤岩体时围岩破碎的状况,降低了后续围岩支护施工难度。超前钻进钢钎使得超前支护时间更短,提升了支护系统的护表刚度,使得巷道掘进成型后围岩结构更稳定。(The invention relates to the field of roadway excavation, and discloses a roadway advance support device and a using method thereof, wherein the roadway advance support device comprises the following steps: a plurality of carriages hinged in sequence; the carriage includes: a first sliding structure and a second sliding structure; the first sliding structure includes: a first slide and a first drill assembly; the second sliding structure includes: a second slide and a second drill assembly; the first drill assembly is slidably disposed on the first slide; the second drill assembly is slidably disposed on the second slide; the first slide is slidably disposed on the second slide. According to the roadway advance support device provided by the invention, the steel drill rod is advanced into the coal rock mass in front of the tunneling head-on contour line, so that the situation that the surrounding rock is broken when the tunneling and anchoring unit tunnels the excavated coal rock mass is improved, and the difficulty of subsequent surrounding rock support construction is reduced. The advance support time is shorter by drilling the steel rod in advance, the surface protection rigidity of the support system is improved, and the surrounding rock structure is more stable after the roadway is tunneled and formed.)

1. A roadway advance support device is characterized by comprising:

a plurality of carriages hinged in sequence; the carriage includes: a first sliding structure and a second sliding structure; the first sliding structure includes: a first slide and a first drill assembly; the second sliding structure includes: a second slide and a second drill assembly;

the first drill assembly is slidably disposed on the first slide; the second drill assembly is slidably disposed on the second slide; the first slide is slidably disposed on the second slide.

2. The roadway advance support device of claim 1, further comprising: a plurality of rotation angle adjusting mechanisms; and the adjacent sliding frames are hinged through the rotating angle adjusting mechanism.

3. The roadway advance support device of claim 2, wherein the number of the carriages is three, being a left side carriage, an upper side carriage and a right side carriage, respectively; the left side carriage and the upper side carriage as well as the right side carriage and the upper side carriage are hinged by the rotation angle adjusting mechanism.

4. The roadway advance support device according to claim 1, wherein a plurality of mutually parallel protrusions are arranged on the first sliding member, and a slide rail corresponding to the protrusions is arranged on the second sliding member; the first sliding piece is arranged on the second sliding piece in a sliding mode through the protrusion and the sliding rail.

5. The roadway advance support device according to claim 4, wherein the first sliding member is provided with a first projection and a second projection which are arranged in parallel with each other; and the second sliding part is provided with a first protruding slide rail corresponding to the first protrusion and a second protruding slide rail corresponding to the second protrusion.

6. The roadway advance support device of claim 5, wherein the first lug is engaged in the first lug slide rail by an inner rolling gear; the second protrusion penetrates through the second protrusion sliding rail, is engaged with the outer rolling gear and is limited in the second protrusion sliding rail.

7. The roadway advance support device of claim 1, wherein a first slide rail is provided on the first slide, and the first drill assembly is slidably provided on the first slide via the first slide rail; and a second sliding rail is arranged on the second sliding part, and the second drilling machine assembly is arranged on the second sliding part in a sliding manner through the second sliding rail.

8. The roadway advance support device of claim 7, wherein the first drill assembly and the second drill assembly are structurally identical and each comprise: the device comprises a sliding platform, a drill slide rail, an adjusting device and a drill;

the sliding platform corresponding to the first drilling machine assembly is slidably arranged on the first slide rail, the sliding platform corresponding to the first drilling machine assembly is provided with the drilling machine slide rail which is arranged perpendicular to the first slide rail, and the drilling machine corresponding to the first drilling machine assembly is slidably arranged on the corresponding drilling machine slide rail through the corresponding adjusting device;

the sliding platform corresponding to the second drilling machine assembly is slidably arranged on the second sliding rail, the drilling machine sliding rail perpendicular to the second sliding rail is arranged on the sliding platform corresponding to the second drilling machine assembly, and the drilling machine corresponding to the second drilling machine assembly is slidably arranged on the corresponding drilling machine sliding rail through the corresponding adjusting device.

9. The roadway advance support device of claim 1, further comprising:

an anchor digging unit and a telescopic mechanism; the digging and anchoring unit is connected with the sliding frames through the telescopic mechanism, and when the telescopic mechanism is in a contraction state, the sliding frames are folded on the digging and anchoring unit; when the telescopic mechanism is in an unfolded state, each sliding frame is arranged at the tunneling head-on position of the tunneling and anchoring unit.

10. A use method of a roadway advance support device is characterized by comprising the following steps:

step S1: arranging each sliding frame at a heading position, adjusting the position between the first sliding structure and the second sliding structure, and unfolding each sliding frame to enable each sliding frame to be abutted against the surrounding rock;

step S2: adjusting the position of each carriage first drilling machine component relative to the first sliding piece, enabling the first drilling machine component to slide to one side far away from the tunneling direction, and fixing the steel rod in the corresponding first drilling machine component; simultaneously adjusting the position of each sliding frame second drilling machine component relative to the second sliding piece, enabling the second drilling machine components to slide to one side far away from the tunneling direction, and fixing the steel drill in the corresponding second drilling machine components; completing the first drilling through the first drilling machine assembly and the second drilling machine assembly corresponding to each sliding frame;

step S3: loosening the drill steel by the first drilling machine assembly and the second drilling machine assembly corresponding to each sliding frame, sliding the first drilling machine assembly and the second drilling machine assembly to one side far away from the tunneling direction again, fixing the drill steel and the first drilling machine assembly or the second drilling machine set corresponding to each sliding frame again, and completing secondary drilling through the first drilling machine assembly and the second drilling machine set corresponding to each sliding frame;

step S4: repeating the step S3 until the drill steel is completely drilled into the coal rock mass in front of the tunneling head-on contour line; and finally, adjusting the position between the first sliding structure and the second sliding structure to furl the sliding frames.

Technical Field

The invention relates to the field of roadway excavation, in particular to a roadway advance support device and a using method thereof.

Background

The rapid excavation of the coal mine tunnel is one of the urgent requirements of coal mining in China, and particularly, the excavation is carried out under the condition that surrounding rocks of the tunnel are broken. A series of problems that the allowable top control distance of tunnel excavation caused by the overflow and leakage of the broken surrounding rock and the caving of the wall caving is small, the surface forming of the surrounding rock of the tunnel is poor, and the installation of supporting components such as a surface protection anchor net cable is difficult exist in the process of the tunnel excavation of the broken surrounding rock.

Wherein, the broken country rock environment can cause several kinds of ore deposit pressure appearance accidents as follows: firstly, an embedded type surrounding rock gangue falling accident; secondly, a roof fall accident of the separated layer type surrounding rock rib; thirdly, the collapse, leakage and extraction accidents of the loose and broken surrounding rock; fourthly, the accident of roof fall due to the fracture of the massive surrounding rock; and fifthly, a soft rock expansion deformation roadway damage accident. In the 5 types of roadway mine pressure emergence accidents, the embedded surrounding rock gangue falling accidents are mainly used and account for about 50% of the accidents, and then the falling accidents of the separated surrounding rock rib and the collapse, leakage and extraction accidents of the loose and broken surrounding rock are used. The smaller top control distance at the tunneling head-on position restricts the tunneling footage to a certain extent, so that the self-circulation overlapping time of all working procedures of tunneling and supporting is longer. Poor tunnel surrounding rock surface forming can lead to the installation difficulty of components such as follow-up table-protecting anchor net cables, and the installation engineering consumes a long time and needs the operation of a plurality of workers, thus the tunneling efficiency and the automation process of the tunnel are seriously restricted. Meanwhile, the existing supporting method has non-full-fit effect on the surface protection of the broken surrounding rock roadway, so that the surface of the roadway is not provided with a tray, and a steel belt is easy to bulge, the overall stress diffusion effect of the supporting system is reduced, and the integrity of a supporting member in the surrounding rock of the roadway is seriously damaged. Aiming at a series of problems existing in the process of tunneling a broken surrounding rock roadway, a tunneling head contour line is urgently needed to drill and mount a side part steel chisel and a top steel chisel before the excavation of the broken surrounding rock roadway, and then a pipe shed supporting system can be formed on the surface of the broken surrounding rock after the excavation of the roadway, so that the broken surrounding rock is prevented from leaking and splitting, and the allowable top control distance at the tunneling head position of the roadway is greatly increased.

At present, a forepoling device which can be systematically matched with an operation process of a digging and anchoring unit, is simple and convenient and has high efficiency is not available.

Disclosure of Invention

In view of the technical defects and application requirements, the embodiment of the invention provides a roadway advance support device and a use method thereof, the roadway advance support device can effectively solve the problems of poor surrounding rock stability, support method mismatching and the like during the existing excavation of a broken surrounding rock roadway, and the advance support efficiency and stability of the broken surrounding rock during the coal mine roadway excavation are improved.

In order to solve the above problems, the present invention provides a roadway advance support device, including: a plurality of carriages hinged in sequence; the carriage includes: a first sliding structure and a second sliding structure; the first sliding structure includes: a first slide and a first drill assembly; the second sliding structure includes: a second slide and a second drill assembly;

the first drill assembly is slidably disposed on the first slide; the second drill assembly is slidably disposed on the second slide; the first slide is slidably disposed on the second slide.

Further, the roadway advance support device further comprises: a plurality of rotation angle adjusting mechanisms; and the adjacent sliding frames are hinged through the rotating angle adjusting mechanism.

Further, the number of the carriages is three, namely a left side carriage, an upper side carriage and a right side carriage; the left side carriage and the upper side carriage and the right side carriage and the upper side carriage are hinged by the rotation angle adjusting mechanism.

Furthermore, a plurality of mutually parallel bulges are arranged on the first sliding part, and a sliding rail corresponding to the bulges is arranged on the second sliding part; the first sliding piece is arranged on the second sliding piece in a sliding mode through the protrusion and the sliding rail.

Furthermore, a first protrusion and a second protrusion which are arranged in parallel are arranged on the first sliding part; and the second sliding part is provided with a first protruding slide rail corresponding to the first protrusion and a second protruding slide rail corresponding to the second protrusion.

Further, the first protrusion is meshed in the first protrusion sliding rail through an inner rolling gear; the second protrusion penetrates through the second protrusion sliding rail, is engaged with the outer rolling gear and is limited in the second protrusion sliding rail.

Further, a first slide rail is arranged on the first sliding part, and the first drilling machine assembly is slidably arranged on the first sliding part through the first slide rail; and a second sliding rail is arranged on the second sliding part, and the second drilling machine assembly is arranged on the second sliding part in a sliding manner through the second sliding rail.

Further, the first drill assembly and the second drill assembly are identical in structure and each comprise: the device comprises a sliding platform, a drill slide rail, an adjusting device and a drill;

the sliding platform corresponding to the first drilling machine assembly is slidably arranged on the first slide rail, the sliding platform corresponding to the first drilling machine assembly is provided with the drilling machine slide rail which is arranged perpendicular to the first slide rail, and the drilling machine corresponding to the first drilling machine assembly is slidably arranged on the corresponding drilling machine slide rail through the corresponding adjusting device;

the sliding platform corresponding to the second drilling machine assembly is slidably arranged on the second sliding rail, the drilling machine sliding rail perpendicular to the second sliding rail is arranged on the sliding platform corresponding to the second drilling machine assembly, and the drilling machine corresponding to the second drilling machine assembly is slidably arranged on the corresponding drilling machine sliding rail through the corresponding adjusting device.

Further, the roadway advance support device further comprises: an anchor digging unit and a telescopic mechanism; the digging and anchoring unit is connected with the sliding frames through the telescopic mechanism, and when the telescopic mechanism is in a contraction state, the sliding frames are folded on the digging and anchoring unit; when the telescopic mechanism is in an unfolded state, each sliding frame is arranged at the tunneling head-on position of the tunneling and anchoring unit.

In order to solve the above problem, an embodiment of the present invention provides a method for using a roadway advance support device, including:

step S1: arranging each sliding frame at a heading position, adjusting the position between the first sliding structure and the second sliding structure, and unfolding each sliding frame to enable each sliding frame to be abutted against the surrounding rock;

step S2: adjusting the position of each carriage first drilling machine component relative to the first sliding piece, enabling the first drilling machine component to slide to one side far away from the tunneling direction, and fixing the steel rod in the corresponding first drilling machine component; simultaneously adjusting the position of each sliding frame second drilling machine component relative to the second sliding piece, enabling the second drilling machine components to slide to one side far away from the tunneling direction, and fixing the steel drill in the corresponding second drilling machine components; completing the first drilling through the first drilling machine assembly and the second drilling machine assembly corresponding to each sliding frame;

step S3: loosening the drill steel by the first drilling machine assembly and the second drilling machine assembly corresponding to each sliding frame, sliding the first drilling machine assembly and the second drilling machine assembly to one side far away from the tunneling direction again, fixing the drill steel and the first drilling machine assembly or the second drilling machine set corresponding to each sliding frame again, and completing secondary drilling through the first drilling machine assembly and the second drilling machine set corresponding to each sliding frame;

step S4: repeating the step S3 until the drill steel is completely drilled into the coal rock mass in front of the tunneling head-on contour line; and finally, adjusting the position between the first sliding structure and the second sliding structure to furl the sliding frames.

According to the roadway advance support device provided by the invention, the steel chisel is advanced to the coal rock mass in front of the tunneling head-on contour line, so that the situation that the surrounding rock is broken when the tunneling and anchoring unit tunnels the excavated coal rock mass is improved, meanwhile, the accidents of roof collapse and wall caving during empty roof and empty wall in the tunneling period are avoided, the subsequent surrounding rock support construction difficulty is reduced, and the roadway support speed and the automation degree are improved. The advanced drilling of the steel drill improves the advanced supporting efficiency and quality of the coal rock mass in front of the tunneling head-on contour line, so that the advanced supporting time is shorter, the operation is simpler, the surface protection rigidity of a pure anchor net cable steel belt supporting system is improved, and the surrounding rock structure is more stable after the roadway is tunneled and formed.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

Fig. 1 is a front view of a roadway advance support device provided in an embodiment of the present invention;

fig. 2 is a side view of a roadway advance support device provided in an embodiment of the present invention;

fig. 3 is a schematic view of a section a-a of the roadway advance support device;

fig. 4 is a partial schematic view of a section a-a of the roadway advance support device;

FIG. 5 is a schematic view of a section B-B of the roadway advance support device;

FIG. 6 is a schematic view of a section C-C of the roadway advance support device;

FIG. 7 is a schematic view of a roadway advance support device with an additional driving and anchoring unit and a telescopic mechanism;

description of reference numerals: 1. a first sliding structure; 2. a second sliding structure; 3. a rotation angle adjusting mechanism; 4. a drilling machine; 5. an adjustment device; 6. a sliding platform; 7a, a first slide rail; 7b, a drill slide rail; 7c, a second slide rail; 8. surrounding rocks; 9. a long slot hole; 10. a first raised slide rail; 11. a second raised slide rail; 12. an inner rolling gear; 13. an outer rolling gear; 14. digging and anchoring machine set; 15. a telescoping mechanism; 16a, a top drill rod; 16b, an upper part steel chisel; 17a, a left side carriage; 17b, an upper side carriage; 17c, right side carriage.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

An embodiment of the present invention provides a roadway advance support device, as shown in fig. 1, the roadway advance support device includes: several carriages hinged in sequence. The carriage includes: a first sliding structure 1 and a second sliding structure 2. The first sliding structure 1 includes: a first slide and a first drill assembly. The second sliding structure 2 includes: a second slide and a second drill assembly. A first drill assembly is slidably disposed on the first slide. The second drill assembly is slidably disposed on the second slide. The first slide is slidably disposed on the second slide.

In the working process of the roadway advance support device, each sliding frame is arranged at the heading position. The position between the first sliding structure 1 and the second sliding structure 2 is adjusted and the carriages are deployed so that they abut against the inside of the surrounding rock 8. And adjusting the position of the first drilling machine assembly of each carriage relative to the first sliding piece, so that the first drilling machine assembly slides to the side far away from the tunneling direction, and the drill steel is fixed in the corresponding first drilling machine assembly. And simultaneously adjusting the position of each carriage second drilling machine component relative to the second sliding piece, so that the second drilling machine components slide to the side far away from the tunneling direction, and the drill steel is fixed in the corresponding second drilling machine components. And completing the first drilling through the first drilling machine assembly and the second drilling machine assembly corresponding to each sliding frame. After the first drilling is finished, the first drilling machine assembly and the second drilling machine assembly corresponding to each sliding frame loosen the steel rods, the first drilling machine assembly and the second drilling machine assembly slide to one side far away from the tunneling direction again, the first drilling machine assembly or the second drilling machine set corresponding to the steel rods and each sliding frame is fixed again, and the second drilling is finished through the first drilling machine assembly and the second drilling machine set corresponding to each sliding frame. And repeating the operations until the drill steel is completely drilled into the coal rock mass in front of the tunneling head contour line. And finally, adjusting the position between the first sliding structure and the second sliding structure to furl the sliding frames.

It should be noted that if the required stability is not achieved, multiple groups of drill rods can be used for drilling in batches. After the first group of steel rods finishes drilling, a second group of steel rods is continuously arranged on the drilling machine assembly to finish drilling. Until all groups of steel drill rods are drilled.

According to the roadway advance support device provided by the embodiment of the invention, the steel drill rod is advanced into the coal rock mass in front of the tunneling head-facing contour line, so that the situation that the surrounding rock is broken when the tunneling and anchoring unit tunnels the excavated coal rock mass is improved, meanwhile, the accidents of roof collapse and wall caving during the tunneling period are avoided, the difficulty of subsequent surrounding rock support construction is reduced, and the roadway support speed and the automation degree are improved. The advanced drilling of the steel drill improves the advanced supporting efficiency and quality of the coal rock mass in front of the tunneling head-on contour line, so that the advanced supporting time is shorter, the operation is simpler, the surface protection rigidity of a pure anchor net cable steel belt supporting system is improved, and the surrounding rock structure is more stable after the roadway is tunneled and formed.

For the convenience of adjustment, as shown in fig. 1, the roadway advance support device further includes: a plurality of rotation angle adjusting mechanisms 3. The adjacent carriages are hinged by a rotation angle adjusting mechanism 3.

In the present embodiment, the number of the carriages is three, and the left carriage 17a, the upper carriage 17b, and the right carriage 17c are provided. The left and upper carriages 17a and 17b and the right and upper carriages 17c and 17b are hinged by the rotation angle adjusting mechanism 3.

To facilitate adjustment of the first and second sliding structures 1, 2, reference is continued to fig. 2, 3, 4, 5 and 6. The first sliding part is provided with a plurality of bulges which are arranged in parallel, and the second sliding part is provided with a sliding rail which is arranged corresponding to the bulges. The first sliding part is arranged on the second sliding part in a sliding way through the bulge and the sliding rail.

Specifically, the first sliding part is provided with a first protrusion and a second protrusion which are arranged in parallel. The second sliding part is provided with a first convex sliding rail 10 corresponding to the first convex and a second convex sliding rail 11 corresponding to the second convex. The first projection is engaged in the first projection slide rail 10 through the inner rolling gear 12. The second protrusion passes through the second protrusion sliding rail 11, is engaged and limited in the second protrusion sliding rail 11 through the outer rolling gear 13, and the second protrusion sliding rail 11 is arranged at the long slot hole 9. The first slider can adjust the relative position between the first slider and the second slider by adjusting the position of the first protrusion on the first protrusion slide rail 10 and simultaneously adjusting the position of the second protrusion on the second protrusion slide rail 11, thereby adjusting the unfolding length of the sliding frame.

To facilitate adjustment of the position of the first drill assembly and the second drill assembly, continued reference is made to fig. 2, 3, 4, 5 and 6. The first sliding part is provided with a first sliding rail 7 a. The first drill assembly is slidably disposed on the first slide by a first slide track 7 a. The second sliding part is provided with a second sliding rail 7c, and the second drilling machine component is arranged on the second sliding part in a sliding way through the second sliding rail 7 c.

Wherein, first rig subassembly is the same with the structure of second rig subassembly, all includes: a sliding platform 6, a drill slide rail 7b, an adjusting device 5 and a drill 4. The sliding platform 6 corresponding to the first drilling machine assembly is slidably arranged on the first slide rail 7a, the sliding platform 6 corresponding to the first drilling machine assembly is provided with a drilling machine slide rail 7b perpendicular to the first slide rail 7a, and the drilling machine 4 corresponding to the first drilling machine assembly is slidably arranged on the corresponding drilling machine slide rail 7b through the corresponding adjusting device 5. The sliding platform 6 corresponding to the second drilling machine assembly is slidably arranged on the second slide rail 7c, the sliding platform 6 corresponding to the second drilling machine assembly is provided with a drilling machine slide rail 7b perpendicular to the second slide rail 7c, and the drilling machine 4 corresponding to the second drilling machine assembly is slidably arranged on the corresponding drilling machine slide rail 7b through the corresponding adjusting device 5. At the same time, the adjusting device 5 is also used to adjust the angle of the drilling machine 4 in order to ensure the driving contour.

In practice, in order to adjust the carriage, with reference to fig. 7, the roadway advance support device may further include an anchor driving unit 14 and a telescopic mechanism 15. The bolting unit 14 is connected to each carriage by a telescopic mechanism 15. When the telescopic mechanism 15 is in a contracted state, the carriages are folded on the digging and anchoring unit 14. When the telescopic mechanism 15 is in the expanded state, each carriage is disposed at the heading position of the heading and anchoring unit 14.

Wherein, the length of the first sliding structure 1 and the second sliding structure 2 can be determined according to the specific model of the digging and anchoring unit 14.

The roadway advance support device provided with the tunneling and anchoring unit 14 and the telescopic mechanism 15 is in the working process. After a cutting distance is cut on the tunneling head by the tunneling and anchoring unit, the temporary support of the tunneling and anchoring unit 14 is lowered, the expansion mechanism is controlled to expand to push the carriages out to the tunneling head, the carriages are expanded to enable the carriages to be abutted against the surrounding rock 8, and the temporary support of the tunneling and anchoring unit 14 is raised again. The left side carriage 17a, the upper side carriage 17b and the right side carriage 17c are adjusted correspondingly based on the size of the section of the excavation roadway and the advance support construction parameters. And adjusting the position of the first drilling machine assembly of each carriage relative to the first sliding piece, so that the first drilling machine assembly slides to the side far away from the tunneling direction, and the drill steel is fixed in the corresponding first drilling machine assembly and is inserted into the position of the first drilling machine assembly with a certain length. And simultaneously adjusting the position of each carriage second drilling machine component relative to the second sliding piece, so that the second drilling machine components slide to the side far away from the tunneling direction, and the drill steel is fixed in the corresponding second drilling machine components and inserted into the second drilling machine components at a position with a certain length. After the drilling direction of the steel drill is adjusted through the adjusting device 5, the corresponding drilling machine 4 is started, the drilling machine 4 and the adjusting device 5 move downwards to one side close to the tunneling direction under the meshing transmission action of the drilling machine slide rails 7b, and the first drilling is completed until the drilling machine moves to the tail end. After the first drilling is completed, the first drilling machine assembly and the second drilling machine assembly corresponding to each sliding frame loosen the steel rods, the first drilling machine assembly and the second drilling machine assembly slide to one side far away from the tunneling direction again, the first drilling machine assembly or the second drilling machine set corresponding to the steel rods and each sliding frame is fixed again, after the drilling direction of the steel rods is adjusted through the adjusting device 5, the corresponding drilling machine 4 is started, and the second drilling is started. And repeating the operations until the drill steel is completely drilled into the coal rock mass in front of the tunneling head contour line. If the required stability is not achieved, multiple groups of steel rods can be used for drilling in batches. And after the first group of steel rods are drilled, continuously arranging a second group of steel rods on the drilling machine assembly to complete drilling until all the groups of steel rods are drilled. After the whole construction process of drilling the steel drill into the coal rock mass in front of the heading head is completed, the temporary support of the heading and anchoring unit 14 is lowered, the telescopic mechanism 15 is controlled to draw the sliding frame onto the heading and anchoring unit 14, the temporary support is lifted again, and the advanced support in a complete stage is completed.

According to the roadway advance support device provided by the embodiment of the invention, the steel drill rod is advanced into the coal rock mass in front of the tunneling head-facing contour line, so that the situation that the surrounding rock is broken when the tunneling and anchoring unit tunnels the excavated coal rock mass is improved, meanwhile, the accidents of roof collapse and wall caving during the tunneling period are avoided, the difficulty of subsequent surrounding rock support construction is reduced, and the roadway support speed and the automation degree are improved. The advanced drilling of the steel drill improves the advanced supporting efficiency and quality of the coal rock mass in front of the tunneling head-on contour line, so that the advanced supporting time is shorter, the operation is simpler, the surface protection rigidity of a pure anchor net cable steel belt supporting system is improved, and the surrounding rock structure is more stable after the roadway is tunneled and formed.

The embodiment of the invention provides a using method of a roadway advance support device, and the specific structure of the roadway advance support device is described in the characters related to fig. 1 to 7, which is not described again here.

The using method of the roadway advance support device comprises the following steps:

step S1: and arranging each sliding frame at a heading position, adjusting the position between the first sliding structure and the second sliding structure, and unfolding each sliding frame to enable each sliding frame to be abutted against the surrounding rock.

Step S2: adjusting the position of each carriage first drilling machine component relative to the first sliding piece, enabling the first drilling machine component to slide to one side far away from the tunneling direction, and fixing the steel rod in the corresponding first drilling machine component; simultaneously adjusting the position of each sliding frame second drilling machine component relative to the second sliding piece, enabling the second drilling machine components to slide to one side far away from the tunneling direction, and fixing the steel drill in the corresponding second drilling machine components; and completing the first drilling through the first drilling machine assembly and the second drilling machine assembly corresponding to each sliding frame.

Step S3: and loosening the steel rods by the first drilling machine assembly and the second drilling machine assembly corresponding to each sliding frame, sliding the first drilling machine assembly and the second drilling machine assembly to one side far away from the tunneling direction again, fixing the steel rods and the first drilling machine assembly or the second drilling machine set corresponding to each sliding frame again, and completing secondary drilling through the first drilling machine assembly and the second drilling machine set corresponding to each sliding frame.

Step S4: repeating the step S3 until the drill steel is completely drilled into the coal rock mass in front of the tunneling head-on contour line; and finally, adjusting the position between the first sliding structure and the second sliding structure to furl the sliding frames.

In a specific embodiment, assuming that two sets of drill steel need to be drilled, the method comprises the following steps:

(1) during the excavation of the tunnel of the fragmented surrounding rock, the construction parameters such as the distance, the azimuth angle and the like are designed for the top steel rod 16a and the side steel rod 16b required by the advance support drilling according to the fragmentation degree of the tunnel surrounding rock.

(2) After the design is finished, a row distance needs to be cut on the tunneling head by the tunneling and anchoring unit, the temporary support of the tunneling and anchoring unit 14 is lowered, the telescopic mechanism is controlled to be unfolded to push out each carriage to the tunneling head, each carriage is unfolded to enable each carriage to be abutted against the surrounding rock 8, and the temporary support of the tunneling and anchoring unit 14 is lifted again.

(3) The lengths of the left side carriage 17a, the upper side carriage 17b and the right side carriage 17c are adjusted correspondingly based on the size of the section of the excavation roadway and the advance support construction parameters. The length adjustment is realized by the position between the first sliding structure 1 and the second sliding structure 2 in each sliding frame.

(4) The drilling position is determined prior to drilling, the position of the first drill assembly of each carriage relative to the first slide is adjusted, the position of the first drill assembly is adjusted by the first slide 7a, and the position of the second drill assembly is adjusted by the second slide 7 c.

(5) And adjusting the position of the first drilling machine assembly of each sliding frame relative to the first sliding piece, so that the first drilling machine assembly slides to one side far away from the tunneling direction, and the steel rod is fixed in the corresponding first drilling machine assembly and inserted into the position of the first drilling machine assembly with a certain length. And simultaneously adjusting the position of each carriage second drilling machine component relative to the second sliding piece, so that the second drilling machine components slide to the side far away from the tunneling direction, and the drill steel is fixed in the corresponding second drilling machine components and inserted into the second drilling machine components at a position with a certain length. After the drilling direction of the steel drill is adjusted through the adjusting device 5, the corresponding drilling machine 4 is started, the drilling machine 4 and the adjusting device 5 move downwards to one side close to the tunneling direction under the meshing transmission action of the drilling machine slide rails 7b, and the first drilling is completed until the drilling machine moves to the tail end. In this embodiment, the left carriage 17a and the right carriage 17c are used for drilling the side wall drill steel 16b, and the upper carriage 17b is used for drilling the top drill steel 16a, so that advance support can be achieved for drilling 6 drill steels at a time, and efficient construction can be achieved.

(6) After the first drilling is completed, the first drilling machine assembly and the second drilling machine assembly corresponding to each sliding frame loosen the steel rods, the first drilling machine assembly and the second drilling machine assembly slide to one side far away from the tunneling direction again, the first drilling machine assembly or the second drilling machine set corresponding to the steel rods and each sliding frame is fixed again, after the drilling direction of the steel rods is adjusted through the adjusting device 5, the corresponding drilling machine 4 is started, and the second drilling is started.

(7) And (5) repeating the step (6) until the steel drill is completely drilled into the coal rock mass in front of the tunneling head-on contour line, thus completing the advance support of the first group of steel drill.

(8) When the second group of steel rods of the advance support is drilled, repeating the steps (5) to (7) until the second group of steel rods of the advance support is completely drilled into the coal rock mass in front of the tunneling head contour line, and completing the advance support of the second group of steel rods;

(9) after the whole construction process of drilling the steel drill into the coal rock mass in front of the heading head is completed, the temporary support of the heading and anchoring unit 14 is lowered, the telescopic mechanism 15 is controlled to draw the sliding frame onto the heading and anchoring unit 14, the temporary support is lifted again, and the advanced support in a complete stage is completed.

The roadway advance support device corresponding to the method can realize the process flow of the retractable advance support device for advance support of the coal rock mass in front of the tunneling head-on contour line through an automatic control program.

In conclusion, the use method of the roadway advance support device improves the situation that surrounding rocks are broken when the tunneling and anchoring unit tunnels the excavated coal rock mass by advancing the drill steel into the coal rock mass in front of the tunneling head-facing contour line, avoids the accidents of roof collapse and wall caving during empty roof and empty wall in the tunneling period, reduces the construction difficulty of subsequent surrounding rock support, and improves the roadway support speed and the automation degree. The advanced drilling of the steel drill improves the advanced supporting efficiency and quality of the coal rock mass in front of the tunneling head-on contour line, so that the advanced supporting time is shorter, the operation is simpler, the surface protection rigidity of a pure anchor net cable steel belt supporting system is improved, and the surrounding rock structure is more stable after the roadway is tunneled and formed. The method can be widely applied to the advance support construction in the coal mine roadway tunneling process, and can effectively improve the advance support efficiency and stability of the broken surrounding rock during the coal mine roadway tunneling process.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.