阅读说明：本技术 滑移顶梁超前支架 (Sliding top beam forepoling ) 是由 亢生彩 张忠原 蒲忠辉 刘琦军 田永超 刘玉锋 李冰 席理明 段青 王进辉 王涛 于 2019-10-31 设计创作，主要内容包括：本发明涉及滑移顶梁超前支架,有效的解决了支架移动时反复支撑顶板造成顶板容易破碎和支架宽度不可调而使支架不能适应巷道内锚杆走向以及影响支架前移的问题；其解决的技术方案包括两组支架,每组支架包括一个内架和一个外架,每组支架的内架和外架经一个推移千斤顶连接,置于两侧的两个外架和两个内架之间分别经两个调架千斤顶连接,当需要移架时,两个外架支撑顶板,两个内架顶梁落在两个外架的横梁上经推移千斤顶推动前移,然后两个内架支撑顶板,两个外架的顶梁落在两个内架的横梁上经推移千斤顶拉动前移；调架千斤顶可以随时调节两个外架和两个内架之间的间距,且通过调架千斤顶使每个内架和每个外架进行单独调整。(The invention relates to a sliding top beam forepoling, which effectively solves the problems that a top plate is easy to crush due to repeated top plate supporting when a bracket moves, and the bracket can not adapt to the trend of an anchor rod in a roadway and the forward movement of the bracket is influenced due to the unadjustable bracket width; the technical scheme includes that the device comprises two groups of supports, each group of supports comprises an inner frame and an outer frame, the inner frame and the outer frame of each group of supports are connected through a pushing jack, the two outer frames arranged on two sides and the two inner frames are connected through two adjusting jacks respectively, when the supports need to be moved, the two outer frames support top plates, top beams of the two inner frames fall on cross beams of the two outer frames and are pushed by the pushing jack to move forwards, then the two inner frames support the top plates, and the top beams of the two outer frames fall on the cross beams of the two inner frames and are pulled by the pushing jack to move forwards; the frame adjusting jack can adjust the distance between the two outer frames and the two inner frames at any time, and each inner frame and each outer frame are independently adjusted through the frame adjusting jack.)

1. The sliding top beam forepoling comprises two groups of brackets which are respectively arranged at two sides of a roadway along the roadway direction and are symmetrical along the center line of the roadway, and is characterized in that each group of brackets comprises an outer frame and an inner frame, and the two inner frames are arranged at the inner sides of the two outer frames; each outer frame comprises an outer frame top beam (1) along the direction of the roadway, two outer frame cross beams (2) which are perpendicular to the direction of the roadway and are arranged at intervals are fixed below each outer frame top beam (1), and an outer frame hydraulic upright (3) is hinged below each outer frame cross beam (2); each inner frame comprises an inner frame top beam (4) along the direction of the roadway, two inner frame cross beams (5) which are perpendicular to the direction of the roadway and are arranged at intervals are fixed below each inner frame top beam (4), and an inner frame hydraulic upright post (6) is hinged below each inner frame cross beam (5); a space is arranged between the outer frame cross beam (2) and the inner frame cross beam (5) which are arranged on the same side in each group of supports, a space is arranged between the outer frame cross beam (2) arranged on the left side and the inner frame cross beam (5) arranged on the right side in each group of supports, a pushing jack (7) is arranged in each space, one end of each pushing jack (7) is hinged with the left outer frame cross beam (2) on the corresponding side, and the other end of each pushing jack is hinged with the right inner frame cross beam (5) on the corresponding side; the two groups of supports are connected through four support adjusting jacks (8) which are perpendicular to the trend of the roadway, wherein two ends of two support adjusting jacks (8) are respectively hinged on the four outer frame cross beams (2), and two ends of the other two support adjusting jacks (8) are respectively hinged on the four inner frame cross beams (5); every outrigger crossbeam (2) are arranged in the below that corresponds side inner frame back timber (4) and can accept the inner frame back timber (4) that corresponds the side whereabouts, be fixed with one on every outrigger crossbeam (2) up end and arrange in the inboard first limiting plate (9) of corresponding side inner frame back timber (4), every inner frame crossbeam (5) are arranged in the below that corresponds side outer frame back timber (1) and can accept the outer frame back timber (1) that corresponds the side whereabouts, be equipped with one on every inner frame crossbeam (5) up end and can dismantle and arrange in and correspond the inboard second limiting plate (10) of side inner frame in.

2. The sliding top beam forepoling according to claim 1, characterized in that the outer frame top beam (1), the outer frame cross beam (2), the inner frame top beam (4) and the inner frame cross beam (5) are all box type structures, and the outer frame top beam (1) and the inner frame top beam (4) are welded with the corresponding outer frame cross beam (2) and inner frame cross beam (5) through a connecting frame (11); the box of outrigger crossbeam (2) is arranged in and articulates on outrigger crossbeam (2) to the upper end of outrigger hydraulic column (3), the box of inner tower crossbeam (5) is arranged in and articulates on inner tower crossbeam (5) to the upper end of inner tower hydraulic column (6), every outrigger crossbeam (2) box inside all is equipped with a fore-set nest with inner tower crossbeam (5) box inside, the upper end of every outrigger hydraulic column (3) and inner tower hydraulic column (6) contacts with the fore-set nest sphere that corresponds.

3. The sliding top beam forepoling according to claim 1, characterized in that the lower end of each outer frame hydraulic column (3) and inner frame hydraulic column (6) is provided with a column shoe (12), the lower end of each outer frame hydraulic column (3) and inner frame hydraulic column (6) is arranged in the corresponding column shoe (12) and is hinged with the corresponding column shoe (12) through a pin shaft, a bottom column socket is arranged inside each column shoe (12), and the lower end of each outer frame hydraulic column (3) and inner frame hydraulic column (6) is in spherical contact with the corresponding bottom column socket.

4. The sliding top beam forepoling according to claim 1, characterized in that each group of brackets is provided with a pair of pushing lug plates (13) on the outer frame cross beam (2) arranged on the left side and the inner frame cross beam (5) arranged on the right side, one end of the pushing jack (7) on each group of brackets is hinged on the outer frame cross beam (2) on the left side of the corresponding side through the pushing lug plates (13), and the other end is hinged on the inner frame cross beam (5) on the right side of the corresponding side through the pushing lug plates (13).

5. The sliding top beam forepoling according to claim 1, characterized in that each outer frame beam (2) and inner frame beam (5) is provided with a pair of adjusting frame ear plates (14), each pair of adjusting frame ear plates (14) is hinged with a crosshead (15) through a pin, and two ends of four adjusting frame jacks (8) are respectively hinged with the corresponding crosshead (15).

Technical Field

The invention relates to the technical field of supporting equipment in a super-front area of a coal mine underground roadway, in particular to a sliding top beam forepoling.

Background

In the existing mine of comprehensive mechanized mining, particularly in a stoping coal mining process, with the advance of a coal face, roadways at two ends of the face are damaged, a roadway behind the moving face is dropped, roadways near the face become unstable, roadways at two ends of the face are not only gathered by a comprehensive machine device but also are necessary roads for transporting raw coal, comprehensive machine devices, materials and the like, the existing method for reinforcing and supporting the section by a coal mine in China is not mature, most of mines adopt an advance supporting means in the form of a single support and a pi-shaped beam or I-shaped steel, and the single support and the pi-shaped beam need to be manually conveyed to the front end to support the next section of roadway in the advancing process, so that the advance supporting strength of the form is low, the efficiency is low, the occupied space is large, and the advance supporting of the high-yield and high-efficiency comprehensive mining face seriously affects the advance of the high-efficiency comprehensive mining face.

The advancing support of the stepping advancing type is gradually developed, although the stepping self-moving advancing support has the advantages of high support strength, good stability, high propelling efficiency and the like, the support length of the advancing support is more than 10 meters, the advancing support is propelled for 0.6 meter each time, the same position needs to be supported for about 20 times, the integrity of a top plate is seriously damaged, the top plate is repeatedly supported in the moving process of the support, the management of the top plate is difficult, and particularly the requirement on the integrity of a roadway top plate is higher and higher due to the comprehensive popularization of the existing gob-side entry retaining process.

The invention patent with the application number of 201811235483.8 discloses a full-section pressure self-moving type advance support hydraulic support, which comprises two inner beams and two outer beams, wherein when the outer beams move, the two inner beams support a top plate, the two outer beams fall on outer beam joists, the two outer beams move through a pushing jack, the top plate is supported after the two outer beams move, the two inner beams fall on the inner beam joists, the two inner beams move through the pushing jack, and the two inner beams and the two outer beams support the top plate together after moving, so that the problem that the roadway top plate is repeatedly supported in the rack moving process is solved; but two inner beams of this patent are connected by the inner beam tie-beam, and two outer beams are connected by the outer beam tie-beam, and the interval of two inner beams and the interval of two outer beams are not adjustable promptly, and need in time adjust the width of support in order to adapt to the stock trend when the stock trend of strutting the tunnel is irregular, and the in-process that removes when the support takes place the skew and can make the card between inner tower and the outer frame dead influence support antedisplacement.

Disclosure of Invention

Aiming at the situation, in order to overcome the defects of the prior art, the invention provides the sliding top beam advance support, and effectively solves the problems that the top plate is easy to break and the support width is not adjustable due to repeated supporting of the top plate when the support moves, so that the support cannot adapt to the trend of an anchor rod in a roadway and the support is influenced to move forwards.

The technical scheme for solving the problems is as follows: the support comprises two groups of supports, wherein the two groups of supports are respectively arranged on two sides of a roadway along the direction of the roadway and are symmetrical along the center line of the roadway, each group of supports comprises an outer frame and an inner frame, and the two inner frames are arranged on the inner sides of the two outer frames; each outer frame comprises an outer frame top beam along the direction of the roadway, two outer frame cross beams which are perpendicular to the direction of the roadway and are arranged at intervals are fixed below each outer frame top beam, and an outer frame hydraulic upright is hinged below each outer frame cross beam; each inner frame comprises an inner frame top beam along the direction of the roadway, two inner frame cross beams which are perpendicular to the direction of the roadway and are arranged at intervals are fixed below each inner frame top beam, and an inner frame hydraulic upright is hinged below each inner frame cross beam; a space is arranged between the outer frame cross beam and the inner frame cross beam which are arranged on the same side in each group of brackets, a space is arranged between the outer frame cross beam arranged on the left side and the inner frame cross beam arranged on the right side in each group of brackets, a pushing jack is arranged in the space, one end of each pushing jack is hinged with the corresponding left outer frame cross beam, and the other end of each pushing jack is hinged with the corresponding right inner frame cross beam; the two groups of supports are connected through four support adjusting jacks vertical to the trend of the roadway, wherein two ends of two support adjusting jacks are respectively hinged on four outer frame cross beams, and two ends of the other two support adjusting jacks are respectively hinged on four inner frame cross beams; every outrigger crossbeam is arranged in the below that corresponds side inner frame back timber and can accept the inner frame back timber that corresponds the side whereabouts in, is fixed with one on every outrigger crossbeam up end and arranges the inboard first limiting plate of corresponding side inner frame back timber in, and every inner frame crossbeam is arranged in the below that corresponds side outer frame back timber and can accept the outrigger back timber that corresponds the side whereabouts in, is equipped with one on every inner frame crossbeam up end and can dismantle and arrange the inboard second limiting plate of corresponding side inner frame in.

According to the invention, the outer frame supports the top plate when the inner frame moves, the inner frame supports the top plate when the outer frame moves, and the two inner frames and the two outer frames are respectively connected through the adjusting frame jack, so that the problems that the top plate is easy to break and the width of the support is not adjustable due to repeated supporting of the top plate when the support moves, so that the support cannot adapt to the trend of the anchor rod in the roadway and the support is influenced to move forwards are solved.

Drawings

FIG. 1 is a front view of the present invention.

Fig. 2 is a left side view of the present invention.

Fig. 3 is a top view of the front bracket of the present invention with the inner frame top beam and the outer frame top beam partially cut away and the pushing jack exposed.

Fig. 4 is a schematic diagram of the two inner frames of fig. 1 moving forward according to the present invention.

Fig. 5 is a schematic diagram of the two inner frames of fig. 3 according to the present invention.

Fig. 6 is a front enlarged view of the outer frame top rail and the outer frame cross rail according to the present invention.

Fig. 7 is an enlarged left view of the outer frame top rail and the outer frame cross rail of the present invention.

Fig. 8 is a sectional view taken along line a-a of fig. 7 in accordance with the present invention.

Fig. 9 is a front enlarged view of the inner frame top rail and the inner frame cross rail according to the present invention.

Fig. 10 is an enlarged left view of the inner frame top rail and the inner frame cross rail according to the present invention.

Fig. 11 is a schematic view of the hydraulic column of the outrigger of the present invention.

Fig. 12 is a front view, a plan view, and a sectional view taken along line B-B in the front view of the column shoe of the present invention.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

As can be seen from fig. 1 to 12, the present invention includes two sets of supports, the two sets of supports are respectively disposed on two sides of the roadway along the roadway direction and are symmetrical along the center line of the roadway, each set of supports includes an outer frame and an inner frame, and the two inner frames are disposed on the inner sides of the two outer frames; each outer frame comprises an outer frame top beam 1 along the direction of the roadway, two outer frame cross beams 2 which are perpendicular to the direction of the roadway and are arranged at intervals are fixed below each outer frame top beam 1, and an outer frame hydraulic upright column 3 is hinged below each outer frame cross beam 2; each inner frame comprises an inner frame top beam 4 along the direction of the roadway, two inner frame cross beams 5 which are perpendicular to the direction of the roadway and are arranged at intervals are fixed below each inner frame top beam 4, and an inner frame hydraulic upright 6 is hinged below each inner frame cross beam 5; a space is arranged between the outer frame cross beam 2 and the inner frame cross beam 5 which are arranged on the same side in each group of brackets, a space is arranged between the outer frame cross beam 2 arranged on the left side and the inner frame cross beam 5 arranged on the right side in each group of brackets, a pushing jack 7 is arranged in the space, one end of each pushing jack 7 is hinged with the left outer frame cross beam 2 on the corresponding side, and the other end of each pushing jack 7 is hinged with the right inner frame cross beam 5 on the corresponding side; the two groups of supports are connected through four support adjusting jacks 8 vertical to the trend of the roadway, wherein two ends of two support adjusting jacks 8 are respectively hinged on the four outer frame cross beams 2, and two ends of the other two support adjusting jacks 8 are respectively hinged on the four inner frame cross beams 5; every outrigger crossbeam 2 is arranged in the below that corresponds side inner frame back timber 4 and can accept the inner frame back timber 4 that corresponds the side whereabouts, be fixed with one on every outrigger crossbeam 2 up end and arrange in the inboard first limiting plate 9 of corresponding side inner frame back timber 4 in, every inner frame crossbeam 5 is arranged in the below that corresponds side outer frame back timber 1 and can accept the outrigger back timber 1 that corresponds the side whereabouts in, be equipped with on every inner frame crossbeam 5 up end and can dismantle and arrange in the inboard second limiting plate 10 of corresponding side inner frame in.

The outer frame top beam 1, the outer frame cross beam 2, the inner frame top beam 4 and the inner frame cross beam 5 are all of box type structures, and the outer frame top beam 1 and the inner frame top beam 4 are welded with the corresponding outer frame cross beam 2 and the corresponding inner frame cross beam 5 through the connecting frame 11; the upper ends of the outer frame hydraulic columns 3 are arranged in the box body of the outer frame cross beam 2 and hinged on the outer frame cross beam 2, the upper ends of the inner frame hydraulic columns 6 are arranged in the box body of the inner frame cross beam 5 and hinged on the inner frame cross beam 5, a jack post nest is arranged inside each box body of the outer frame cross beam 2 and inside each box body of the inner frame cross beam 5, the upper ends of each outer frame hydraulic column 3 and each inner frame hydraulic column 6 are in spherical contact with the corresponding jack post nest, as shown in fig. 8 and 11, the jack post nest in the box body of the inner frame cross beam 5 is the jack post nest in the box body of the outer frame cross beam 2 in fig. 8, and the inner frame hydraulic columns 6 are the outer frame hydraulic columns 3 in fig. 11; outer frame back timber 1, inner frame back timber 4 makes its difficult emergence deformation when supporting the roof for box structure, outer frame crossbeam 2, inner frame crossbeam 5 is the box structure neither yielding but makes things convenient for outer frame hydraulic column 3 and inner frame hydraulic column 6's installation, outer frame hydraulic column 3 and inner frame hydraulic column 6 and the outer frame crossbeam 2 and the 5 sphere contacts of inner frame crossbeam that correspond, the roof is to the decurrent pressure of support to accepting that can be fine, connection frame 11 is the rectangular frame structure who is enclosed by four connecting plates, make outer frame back timber 1 and inner frame back timber 4 and the outer frame crossbeam 2 and the 5 leg joint of inner frame crossbeam that correspond more stable firm.

The lower ends of each outer frame hydraulic upright 3 and each inner frame hydraulic upright 6 are respectively provided with a column shoe 12, the lower ends of each outer frame hydraulic upright 3 and each inner frame hydraulic upright 6 are arranged in the corresponding column shoe 12 and are hinged with the corresponding column shoe 12 through a pin shaft, a bottom column socket is arranged inside each column shoe 12, and the lower ends of each outer frame hydraulic upright 3 and each inner frame hydraulic upright 6 are in spherical contact with the corresponding bottom column socket, as shown in fig. 11 and 12; the contact of outrigger hydraulic column 3 and inner tower hydraulic column 6 and the 12 sphere of the column shoe that corresponds, the pressure transmission that will come from the roof that can be fine gives column shoe 12, and column shoe 12 has increased the area of contact of hydraulic column and ground, makes the support stable support roof, if the roof undulates great in addition, can increase the height of link frame 11, increases the height of outrigger back timber 1 and 4 whereabouts of inner tower back timber, can pass through smoothly when making the inner and outer support move the frame.

A pair of pushing lug plates 13 are respectively arranged on the outer frame cross beam 2 arranged on the left side and the inner frame cross beam 5 arranged on the right side of each group of supports, one end of a pushing jack 7 on each group of supports is hinged on the left outer frame cross beam 2 on the corresponding side through the pushing lug plates 13, and the other end of the pushing jack is hinged on the right inner frame cross beam 5 on the corresponding side through the pushing lug plates 13; when the inner frame is pushed forwards, the outer frame top beam 1 supports the top plate, the inner frame hydraulic upright 6 unloads to enable the inner frame top beam 4 to fall on the outer frame cross beam 2 on the corresponding side and the corresponding column shoe 12 to be lifted off, the pushing jack 7 piston rod extends to push the inner frame to move forwards, the inner frame hydraulic upright 6 lifts the column after the inner frame top beam 4 is moved in place, the lifted column shoe 12 falls back to the ground, the inner frame top beam 4 starts to support the top plate again, when the outer frame is pushed forwards, the inner frame top beam 4 supports the top plate, the outer frame hydraulic upright 3 unloads to enable the outer frame top beam 1 to fall on the inner frame cross beam 5 on the corresponding side and the corresponding column shoe 12 to be lifted off, the pushing jack 7 piston rod is retracted to pull the outer frame to move forwards, the outer frame hydraulic upright 3 lifts the column after the outer frame hydraulic upright is moved in place, the lifted column shoe 12.

Each outer frame cross beam 2 and each inner frame cross beam 5 are respectively provided with a pair of adjusting frame ear plates 14, each pair of adjusting frame ear plates 14 is hinged with a cross head 15 through a pin shaft, and two ends of four adjusting frame jacks 8 are respectively hinged with the corresponding cross heads 15; will arrange the outrigger of tunnel both sides in and arrange the inner frame of tunnel both sides in through adjusting a jack 8 and link together, when the tunnel stock trend is irregular or the support takes place the incline at the in-process that moves forward, adjust the interval that a jack 8 can adjust two sets of supports at any time, adjust an outer frame crossbeam 2 and the inner frame crossbeam 5 that a jack 8 and correspond and pass through cross head 15 and connect, can avoid the support to descend and lead to the fact the harm to an exchange jack 8 when advancing, simultaneously when roof both sides height inequality, two sets of supports can carry out height adjustment alone and can not influence each other, make two sets of supports can be abundant with the corresponding side contact of roof.

The specific working process of the invention is as follows: two groups of supports are respectively arranged on two sides of the roadway along the roadway direction and are symmetrical along the central line of the roadway, each group of supports is uniformly arranged between two rows of anchor rods of the roadway, and the inner frame and the outer frame are respectively lifted through the outer frame hydraulic upright 3 and the inner frame hydraulic upright 6, so that two groups of inner frame top beams 4 and outer frame top beams 1 are in contact with the top plate and support the top plate; two frame adjusting jacks 8 are respectively hinged between the two inner frames and between the two outer frames, and the space between the two groups of supports is in accordance with the width of the roadway by adjusting the frame adjusting jacks 8.

With the advance of a coal face, supports for supporting a top plate need to move forwards, firstly, two outer frame top beams 1 support the top plate, the inner frame hydraulic upright columns 6 are unloaded to enable the two inner frame top beams 4 to fall on the outer frame cross beams 2 on the corresponding sides and corresponding column shoes 12 to be lifted off the ground, piston rods of pushing jacks 7 of the two groups of supports extend out to push the two inner frames to move forwards along the trend of a roadway, the inner frame hydraulic upright columns 6 lift the columns after the inner frames move in place, the column shoes 12 which are lifted off the ground fall back, and the two inner frame top beams 4 start to support the top plate again; then the two inner frame top beams 4 support the top plate, the two outer frame hydraulic upright columns 3 are unloaded to enable the two outer frame top beams 1 to fall on the inner frame cross beams 5 on the corresponding sides and the corresponding column shoes 12 to be lifted off, the piston rods of the pushing jacks 7 of the two groups of supports are retracted to pull the two outer frames to move forwards along the roadway, the outer frame hydraulic upright columns 3 lift the columns after the two outer frames move in place, the column shoes 12 which are lifted off the ground fall back to the ground, the two outer frame top beams 1 start to support the top plate again, and the two inner frames and the two outer frames respectively move forwards by a step distance to complete an action cycle; the lengths of the two groups of supports meet the requirement of descending the shaft of the vertical shaft cage, and the maximum distance of the pushing jack 7 stroke, namely the forward movement of the inner frame and the outer frame after completing one action cycle, is more than or equal to the cutting depth of the coal mining machine so as to meet the requirement of propelling the working face.

When the situation that the direction of the anchor rod is irregular is met, only the inner frame on one side of the roadway needs to be adjusted independently, two outer frames which do not need to be adjusted and the inner frame supporting top plate on the other side are needed, the inner frame hydraulic upright 6 corresponding to the inner frame which needs to be adjusted is unloaded, the inner frame top beam 4 of the inner frame falls on the outer frame cross beam 2 on the corresponding side, the corresponding column shoe 12 is lifted off, the pushing jack 7 on the corresponding side pushes the inner frame to move, and after the inner frame is adjusted to a proper position, the inner frame supports the top plate again; when only the outer frame on one side of the roadway needs to be adjusted independently, the operation steps are the same as those of the inner frame on one side of the roadway, and the description is omitted here.

When the inner frame moves forwards along the roadway, the inner frame top beam 4 falls on the outer frame cross beam 2 on the corresponding side, the inner frame top beam 4 is pushed by the pushing jack 7 to move forwards horizontally under the supporting and guiding effects of the outer frame cross beam 2, and the first limiting plate 9 on the outer frame cross beam 2 can prevent the inner frame top beam 4 from deflecting on the horizontal plane and sliding away from the outer frame cross beam 2 when moving forwards; when the outrigger moves forward along the trend of the roadway, the outrigger top beam 1 falls on the outrigger cross beam 2 on the corresponding side, the outrigger top beam 1 horizontally moves forward through pushing the jack 7 under the supporting and guiding effects of the outrigger cross beam 2, the second limiting plate 10 on the inner frame cross beam 5 can avoid the skewing on the horizontal plane when the outrigger top beam 1 moves forward and slides away from the inner frame cross beam 5, the second limiting plate 10 is fixed on the inner frame cross beam 5 through bolts, and can be detached from the inner frame cross beam 5, thereby facilitating the installation of the inner and outer frames.

The outer frames on two sides of the roadway are connected together through two frame adjusting jacks 8, the distance between the two groups of outer frames can be adjusted at any time, the inner frames on two sides of the roadway are connected together through the other two frame adjusting jacks 8, the distance between the two groups of inner frames can be adjusted at any time, when the trend of the anchor rod is irregular or the support is inclined in the frame moving process, the two inner frames or the two outer frames can be moved simultaneously through the matching of the frame adjusting jacks 8 and the pushing jacks 7, any one inner frame or any one outer frame can be independently adjusted at any time, the support is adaptive to the trend of the anchor rod, the phenomenon that the frame moving is affected by the clamping between the inner frame and the outer frame due to the inclination in the moving process of the support is avoided, two ends of the frame adjusting jacks 8 are hinged with the corresponding outer frame cross beams 2 and the inner frame cross beams 5 through the cross heads 15, and the damage to the frame adjusting jacks 8 in the frame moving process is avoided, simultaneously when roof both sides height inequality, two sets of supports can carry out height control alone and can not influence each other, make two sets of supports can fully contact with the corresponding side of roof.

The hydraulic control system is a conventional technology of the system, and the hydraulic control system of the device can be designed by persons of ordinary skill in the art, and is not described in detail herein.

The innovation points of the invention are as follows:

1. through set up a set of inner tower and outrigger respectively in the both sides in tunnel, the outrigger supports the roof when the inner tower removes, and the inner tower supports the roof when the outrigger removes, makes the roof be in the state of being supported all the time, has effectively alleviated the support and has removed the easy broken problem of roof that the in-process roof was unloaded and lead to by repeated pressurization.

2. The outer frames arranged on two sides of the roadway are connected together and the inner frames arranged on two sides of the roadway are connected together through the support adjusting jack 8, so that the distance between the two groups of supports can be adjusted at any time according to the trend of the anchor rods, and the phenomenon that the supports are deadly clamped between the inner frames and the outer frames to affect the movement of the supports due to deflection in the moving process of the supports is avoided.

3. The both ends of transferring the jack 8 are articulated with corresponding outrigger crossbeam 2, inner frame crossbeam 5 through cross head 15, have avoided the support to descend and have caused the harm to transferring the jack 8 when advancing, and two sets of supports can carry out height control alone simultaneously, make two sets of inner frame back timber 4 and outrigger back timber 1 can fully contact with the corresponding side of roof.

4. The outer frame top beam 1 and the inner frame top beam 4 are of box structures, so that the outer frame top beam and the inner frame top beam are not easy to deform when supporting the top plate, the support of the top plate is more stable, and the outer frame cross beam 2 and the inner frame cross beam 5 are of box structures which are not easy to deform and are convenient for the installation of the outer frame hydraulic upright column 3, the inner frame hydraulic upright column 6, the pushing jack 7 and the adjusting jack 8.

5. The first limiting plate 9 on the outer frame cross beam 2 deflects on the horizontal plane and slides away from the outer frame cross beam 2 when the inner frame top beam 4 is prevented from moving forwards, the detachable second limiting plate 10 on the inner frame cross beam 5 can prevent the deflection on the horizontal plane and slide away from the inner frame cross beam 5 when the outer frame top beam 1 moves forwards, and the second limiting plate 10 is detached simultaneously to facilitate the installation of the inner frame and the outer frame.

6. The connection frame 11 between the outer frame top beam 1, the inner frame top beam 4 and the corresponding outer frame cross beam 2 and the corresponding inner frame cross beam 5 can be adjusted according to the roof condition of the underground roadway, if the roof is fluctuated greatly, the height of the connection frame can be increased, and the support can pass through smoothly.

According to the invention, the outer frame supports the top plate when the inner frame moves, the inner frame supports the top plate when the outer frame moves, and the two inner frames and the two outer frames are respectively connected through the adjusting frame jack, so that the problems that the top plate is easy to break and the width of the support is not adjustable due to repeated supporting of the top plate when the support moves, so that the support cannot adapt to the trend of the anchor rod in the roadway and the support is influenced to move forwards are solved.