阅读说明：本技术 一种迈步自移式临时支护装备及其支护方法 (Stepping self-moving type temporary support equipment and support method thereof ) 是由 张晶晶 路彬 王东生 杨洪伟 王潘忠 孙元亮 于 2021-09-30 设计创作，主要内容包括：一种迈步自移式临时支护装备及其支护方法,属于煤矿井下支护技术领域,解决现有支护设备工作效率低、减少配套设备数量的技术问题,解决方案为：若干临时支护装备横跨于掘进机上方并沿着掘进前进方向依次排列布置,顶梁组件包括第一顶梁和第二顶梁,第一顶梁的首尾两端分别通过顶梁连接耳座与第二顶梁的一端铰接,第二顶梁的另一端通过立柱连接耳座与立柱组件铰接,两侧立柱组件相对设置,立柱组件的下方设置自移底座部件。本发明最末端临时支护装备能够缩小迈步自移行走,移至掘进工作面迎头后展开,对掘进机新截割出的巷道顶板进行及时临时支护,实现掘进机割煤进尺推进和支护前移同步跟进,增强了支护强度及稳定性,适应性更强。(A stepping self-moving temporary support device and a support method thereof belong to the technical field of underground coal mine support, and solve the technical problems of low working efficiency and reduced number of matched equipment of the existing support device, and the solution is as follows: a plurality of temporary support equipment span in entry driving machine top and arrange in proper order along the tunnelling direction of advance, and the back timber subassembly includes first back timber and second back timber, and the head and the tail both ends of first back timber are articulated with the one end of second back timber through back timber connection ear seat respectively, and the other end of second back timber passes through stand connection ear seat and stand subassembly and articulates, and both sides stand subassembly sets up relatively, and the below of stand subassembly sets up the self-moving base unit. The tail-end temporary supporting equipment can reduce the stepping self-moving walking, is moved to the heading face of the tunneling working face and then is unfolded, and temporarily supports the newly cut tunnel top plate of the tunneling machine in time, so that the coal cutting footage advancing and the forward supporting synchronous following of the tunneling machine are realized, the supporting strength and stability are enhanced, and the adaptability is stronger.)

1. The utility model provides a take a step from moving formula temporary support equipment, it includes support cylinder (6), walking hydro-cylinder, ear seat, back timber subassembly and stand subassembly (2), the walking hydro-cylinder includes first walking hydro-cylinder (1-5) and second walking hydro-cylinder (1-6), its characterized in that: according to the actual working condition, a plurality of temporary supporting equipment span the upper part of the tunneling machine and are sequentially arranged along the tunneling advancing direction; the top beam assembly comprises a first top beam (3) and a second top beam (4), the head end and the tail end of the first top beam (3) are hinged with one end of the second top beam (4) through top beam connecting lug seats (5-1), the other end of the second top beam (4) is hinged with the upright post assembly (2) through upright post connecting lug seats (5-2), the upright post assemblies (2) on two sides are oppositely arranged, and a self-moving base component (1) is arranged below the upright post assembly (2);

the self-moving base part (1) comprises a left lifting base (1-2), a right lifting base (1-3) and a sliding base (1-1), the left lifting base (1-2) and the right lifting base (1-3) are oppositely arranged at the head end and the tail end of the sliding base (1-1), and a second lug seat (1-7) fixedly connected with the upright post component (2) is arranged on the upper surface of the sliding base (1-1); the left lifting base (1-2) and the right lifting base (1-3) respectively comprise an outer lifting frame, a base lifting oil cylinder (1-2-2), an inner guide frame (1-2-3) and a third lug seat (1-2-4), the outer lifting frame is sleeved outside the inner guide frame (1-2-3), the base lifting oil cylinder (1-2-2) is arranged between the outer lifting frame and the inner guide frame (1-2-3), and the base lifting oil cylinder (1-2-2) drives the outer lifting frame to ascend or descend along the inner guide frame (1-2-3); the outer lifting frame in the left lifting base (1-2) is a first outer lifting frame (1-2-1), and the third ear seat (1-2-4) is arranged at the middle position of the inner side wall of the first outer lifting frame (1-2-1); the outer lifting frame in the right lifting base (1-3) is a second outer lifting frame (1-3-1), and the third ear seat (1-2-4) is arranged at the lower part of the inner side wall of the second outer lifting frame (1-3-1); the side wall of the sliding base (1-1) is provided with a first ear seat (1-4) corresponding to the position of the third ear seat (1-2-4) horizontally; the second walking cylinders (1-6) are arranged above the first walking cylinders (1-5), the axial directions of the first walking cylinders (1-5) and the second walking cylinders (1-6) are parallel to each other, the directions of the first walking cylinders (1-5) and the second walking cylinders (1-6) are opposite, the cylinder barrels of the first walking cylinders (1-5) and the cylinder barrels of the second walking cylinders (1-6) are respectively and fixedly connected with the corresponding first lug seats (1-4), and the piston rods of the first walking cylinders (1-5) and the piston rods of the second walking cylinders (1-6) are respectively and fixedly connected with the corresponding third lug seats (1-2-4);

the upright post assembly (2) comprises an outer upright post frame (2-1), an inner upright post frame (2-2) and upright post lifting oil cylinders (2-3), the outer upright post frame (2-1) is sleeved outside the inner upright post frame (2-2), the upright post lifting oil cylinders (2-3) are symmetrically arranged below two ends of the outer upright post frame (2-1), cylinder barrels of the upright post lifting oil cylinders (2-3) are fixedly connected with second lug seats (1-7), piston rods of the upright post lifting oil cylinders (2-3) are fixedly connected with two ends of the outer upright post frame (2-1), and the upright post lifting oil cylinders (2-3) drive the outer upright post frame (2-1) to ascend or descend along the inner upright post frame (2-2);

a support oil cylinder (6) is arranged between the upper part of the upright post component (2) at two sides and the top beam component respectively, the supporting oil cylinder (6) comprises a first supporting oil cylinder (6-2) and a second supporting oil cylinder (6-4), a fourth lug seat (6-1) is fixedly installed on the upper portion of the upright post assembly (2), a sixth lug seat (6-5) is fixedly installed on the lower surface of the first top beam (3), a cylinder barrel of the first supporting oil cylinder (6-2) is hinged to the fourth lug seat (6-1), a piston rod of the first supporting oil cylinder (6-2) and a piston rod of the second supporting oil cylinder (6-4) are hinged to a fifth lug seat (6-3), the fifth lug seat (6-3) is fixedly installed on the lower surface of the second top beam (4), and a cylinder barrel of the second supporting oil cylinder (6-4) is hinged to the sixth lug seat (6-5).

2. An advancing self-propelled temporary support assembly as claimed in claim 1, wherein: when the temporary supporting equipment is in a supporting state, the self-moving base component (1) is a bearing component and bears the pressure of a top plate and the reaction force of a bottom plate, and the pressure of the top plate is transmitted to the self-moving base component (1) through a top beam component and an upright post component; when the temporary supporting equipment is in a moving state, the self-moving base part (1) drives the tail end temporary supporting equipment to integrally advance and move until the tail end temporary supporting equipment moves to the head-on position of a working face.

3. An advancing self-propelled temporary support assembly as claimed in claim 1, wherein: the cylinder barrel of the base lifting oil cylinder (1-2-2) is fixedly connected with the top surface of the corresponding outer lifting frame, and the piston rod of the base lifting oil cylinder (1-2-2) is fixedly connected with the bottom surface of the inner guide frame (1-2-3).

4. An advancing self-propelled temporary support assembly as claimed in claim 1, wherein: when the temporary supporting equipment is in a supporting state, the upright post lifting oil cylinder (2-2) extends to the maximum stroke position, the top beam assembly is pushed to lift the supporting top plate, the first supporting oil cylinder (6-2) is in the zero stroke position, and the second supporting oil cylinder (6-4) is in the maximum stroke position; when the temporary support equipment is in a contraction state, the upright post lifting oil cylinder (2-2) is retracted to a zero stroke position to drive the top beam assembly to descend, the first support oil cylinder (6-2) is in a maximum stroke position, and the second support oil cylinder (6-4) is in a zero stroke position.

5. A method of bracing an advancing self-propelled temporary bracing arrangement as claimed in claim 1, comprising the steps of:

s1, the extreme temporary support equipment is converted from the support state to the contraction state:

s1-1, the upright post lifting oil cylinder (2-3) falls back to the zero stroke position, and the overall height of the top beam assembly and the upright post assembly (2) is reduced;

s1-2, the first supporting oil cylinder (6-2) extends to the maximum stroke position, meanwhile, the second supporting oil cylinder (6-4) retracts to the zero stroke position, the second top beam (4) rotates inwards around the top beam connecting lug seat (5-1) to drive the self-moving base component (1) and the upright component (2) on the two sides of the extreme temporary supporting equipment to synchronously move inwards, the overall width of the extreme temporary supporting equipment is narrowed, the overall width of the extreme temporary supporting equipment in a contraction state is smaller than that of the extreme temporary supporting equipment in a supporting state, and the height of the top beam component is larger than that after the action of the step S1-1 and is lower than that of the top beam component in the supporting state;

s2, the most tail end temporary supporting equipment travels to the most front end position of the whole group of temporary supporting equipment:

s2-1, extending a piston rod of a first traveling oil cylinder (1-5) of the extreme temporary supporting equipment to push a right lifting base (1-3) to move forwards;

s2-2, lifting a base lifting oil cylinder (1-2-2), pushing an outer lifting frame to lift, and simultaneously synchronously lifting a sliding base (1-1), an upright post assembly (2) and a top beam assembly;

s2-3, retracting the first walking oil cylinder (1-5), extending the second walking oil cylinder (1-6), synchronously sliding the sliding base (1-1) forwards along with the second walking oil cylinder (1-6), and sliding the top beam assembly and the upright post assembly (2) of the temporary supporting equipment at the tail end forwards integrally;

s2-4, retracting the base lifting oil cylinder (1-2-2), descending the linkage outer lifting frame, synchronously descending the sliding base (1-1), and synchronously descending the top beam assembly and the upright post assembly (2) of the temporary support equipment at the tail end to the lowest position;

s2-5, retracting the second walking oil cylinder (1-6), and synchronously moving the left lifting base (1-2) forwards to finish the forward movement of the tail end temporary supporting equipment by one step;

s2-6, repeating the steps S2-1 to S2-5, and walking the temporary support equipment at the tail end to the foremost position of the whole group of temporary support equipment in a stepping mode;

s3, the extreme temporary support equipment is converted from a contraction state to a support state: sequentially and reversely operating the steps S1-2 and S1-1 until the extreme temporary supporting equipment reaches the preset supporting height;

s4, cutting coal by the heading machine for at least two times, and repeating the steps S1-S3 by the aid of the temporary support equipment at the tail end.

Technical Field

The invention belongs to the technical field of underground coal mine roadway support, and particularly relates to stepping self-moving type temporary support equipment and a support method thereof.

Background

In the coal mine continuous mining and filling coal mining process, a long-wall arrangement and short-wall mining mode is adopted, the length of a branch roadway coal mining operation surface is generally 80m, and in order to ensure the safety of branch roadway coal mining tunneling operation and improve the level of a mechanical temporary support device at the head of a tunneling working surface and the tunneling production efficiency, the self-moving temporary support device of a straddle tunneling machine plays an important role. Common temporary support methods include:

1. the single hydraulic support is matched with the pi-shaped metal hinged beam, the support mode has high labor intensity, low efficiency and small support area, cannot realize mechanization, and has high operation safety risk when personnel enter an empty roof area;

2. the front canopy is used for supporting, and the supporting mode has no primary supporting force, poor safety and reliability, high manual labor intensity and low supporting intensity;

3. the onboard temporary support device of the heading machine has small support area and low support strength, and personnel enter an empty roof area outside the support area to have large operation safety risk.

The three supporting modes are traditional tunneling temporary supporting modes, and for the short-wall mining process, the three supporting modes have poor adaptability for realizing the parallel operation relation of tunneling and supporting and the requirement of no repeated supporting of a top plate.

Disclosure of Invention

In order to overcome the defects of the prior art and solve the technical problems of low working efficiency, poor safety and reliability and high manual labor intensity of the conventional supporting device, the invention provides a stepping self-moving type temporary supporting device and a supporting method thereof, which realize the mechanization of tunneling temporary supporting, the relation of 'tunneling parallel operation' and no repeated support to a top plate, and effectively improve the safety and reliability of tunneling operation and the production footage efficiency. The tail-end temporary supporting equipment can reduce the stepping self-walking, move to the heading face and then expand, and temporarily support the newly cut tunnel top plate of the development machine in time, so that the coal cutting footage advancing and the forward moving of the support of the development machine can be synchronously followed.

The invention is realized by the following technical scheme.

The utility model provides a take a step from moving formula temporary support equipment, it includes support cylinder, walking hydro-cylinder, ear seat, back timber subassembly and stand subassembly, the walking hydro-cylinder includes first walking hydro-cylinder and second walking hydro-cylinder, wherein: according to the actual working condition, a plurality of temporary supporting equipment span the upper part of the tunneling machine and are sequentially arranged along the tunneling advancing direction; the top beam assembly comprises a first top beam and a second top beam, the head end and the tail end of the first top beam are respectively hinged with one end of the second top beam through top beam connecting lug seats, the other end of the second top beam is hinged with the upright post assembly through upright post connecting lug seats, the upright post assemblies on two sides are oppositely arranged, and a self-moving base component is arranged below the upright post assembly;

the self-moving base part comprises a left lifting base, a right lifting base and a sliding base, the left lifting base and the right lifting base are oppositely arranged at the head end and the tail end of the sliding base, and a second lug seat fixedly connected with the upright post assembly is arranged on the upper surface of the sliding base; the left lifting base and the right lifting base respectively comprise an outer lifting frame, a base lifting oil cylinder, an inner guide frame and a third lug seat; the outer lifting frame is sleeved outside the inner guide frame, the base lifting oil cylinder is arranged between the outer lifting frame and the inner guide frame, and the base lifting oil cylinder drives the outer lifting frame to ascend or descend along the inner guide frame; the outer lifting frame in the left lifting base is a first outer lifting frame, and the third ear seat is arranged in the middle of the inner side wall of the first outer lifting frame; the outer lifting frame is a second outer lifting frame in the right lifting base, and the third ear seat is arranged at the lower position of the inner side wall of the second outer lifting frame; the side wall of the sliding base is provided with a first ear seat horizontally opposite to the third ear seat; the second walking oil cylinder is arranged above the first walking oil cylinder, the axial direction of the first walking oil cylinder is parallel to the axial direction of the second walking oil cylinder, the directions of the first walking oil cylinder and the second walking oil cylinder are opposite, a cylinder barrel of the first walking oil cylinder and a cylinder barrel of the second walking oil cylinder are respectively and fixedly connected with the corresponding first lug seats, and a piston rod of the first walking oil cylinder and a piston rod of the second walking oil cylinder are respectively and fixedly connected with the corresponding third lug seats;

the upright post assembly comprises an outer upright post frame, an inner upright post frame and upright post lifting oil cylinders, the outer upright post frame is sleeved outside the inner upright post frame, the upright post lifting oil cylinders are symmetrically arranged below two ends of the outer upright post frame, cylinder barrels of the upright post lifting oil cylinders are fixedly connected with the second lug seats, piston rods of the upright post lifting oil cylinders are fixedly connected with two ends of the outer upright post frame, and the upright post lifting oil cylinders drive the outer upright post frame to ascend or descend along the inner upright post frame;

both sides the upper portion of stand subassembly respectively with set up the support cylinder between the back timber subassembly, the support cylinder includes first support cylinder and second support cylinder, fourth ear seat fixed mounting in the upper portion of stand subassembly, sixth ear seat fixed mounting is on the lower surface of first back timber, the cylinder of first support cylinder is articulated with fourth ear seat, the piston rod of first support cylinder and the piston rod of second support cylinder all articulate with fifth ear seat, fifth ear seat fixed mounting is on the lower surface of second back timber, the cylinder of second support cylinder is articulated with sixth ear seat.

Further, when the temporary support equipment is in a supporting state, the self-moving base part is a bearing part and bears the pressure of the top plate and the reaction force of the bottom plate, and the pressure of the top plate is transmitted to the self-moving base part through the top beam assembly and the upright post assembly; when the temporary supporting equipment is in a moving state, the self-moving base part drives the tail end temporary supporting equipment to integrally move forward and move until the tail end temporary supporting equipment moves to the head-on position of a working face.

Furthermore, a cylinder barrel of the base lifting oil cylinder is fixedly connected with the top surface of the corresponding outer lifting frame, and a piston rod of the base lifting oil cylinder is fixedly connected with the bottom surface of the inner guide frame.

Further, when the temporary support equipment is in a supporting state, the upright post lifting oil cylinder extends to a maximum stroke position to push the top beam assembly to lift the support top plate, the first support oil cylinder is in a zero stroke position, and the second support oil cylinder is in a maximum stroke position; when the temporary support equipment is in a contraction state, the upright post lifting oil cylinder retracts to a zero stroke position to drive the top beam assembly to descend, the first support oil cylinder is at a maximum stroke position, and the second support oil cylinder is at a zero stroke position.

A supporting method of a stepping self-moving type temporary supporting device comprises the following steps:

s1, the extreme temporary support equipment is converted from the support state to the contraction state:

s1-1, the upright post lifting oil cylinder falls back to the zero stroke position, and the overall height of the top beam assembly and the upright post assembly is reduced;

s1-2, the first supporting oil cylinder extends to the maximum stroke position, meanwhile, the second supporting oil cylinder retracts to the zero stroke position, the second top beam rotates inwards around the top beam connecting lug seat to drive the self-moving base components and the upright post components on the two sides of the extreme temporary supporting equipment to synchronously move inwards, the overall width of the extreme temporary supporting equipment is narrowed, the overall width of the extreme temporary supporting equipment is smaller than that of the extreme temporary supporting equipment in the supporting state in the contraction state, and the height of the top beam assembly is larger than that of the top beam assembly after the action of the step S1-1 and is lower than that of the top beam assembly in the supporting state;

s2, the most tail end temporary supporting equipment travels to the most front end position of the whole group of temporary supporting equipment:

s2-1, extending a piston rod of a first traveling oil cylinder of the extreme temporary supporting equipment to push the right lifting base to move forwards;

s2-2, lifting the base lifting oil cylinder, pushing the outer lifting frame to lift, and simultaneously synchronously lifting the sliding base, the upright post assembly and the top beam assembly;

s2-3, retracting the first walking oil cylinder, extending the second walking oil cylinder, synchronously sliding the sliding base forwards along with the second walking oil cylinder, and sliding the top beam assembly and the upright post assembly of the temporary support equipment at the tail end forwards integrally;

s2-4, retracting the base lifting oil cylinder, descending the linkage outer lifting frame, synchronously descending the sliding base, and synchronously descending the top beam assembly and the upright post assembly of the temporary supporting equipment at the tail end to the lowest position;

s2-5, retracting the second walking oil cylinder, synchronously sliding the left lifting base forwards, and completing forward movement of the tail end temporary supporting equipment by one step;

s2-6, repeating the steps S2-1 to S2-5, and walking the temporary support equipment at the tail end to the foremost position of the whole group of temporary support equipment in a stepping mode;

s3, the extreme temporary support equipment is converted from a contraction state to a support state: sequentially and reversely operating the steps S1-2 and S1-1 until the extreme temporary supporting equipment reaches the preset supporting height;

s4, cutting coal by the heading machine for at least two times, and repeating the steps S1-S3 by the aid of the temporary support equipment at the tail end. And finally, the tail-end temporary support equipment restores the support state and reaches the preset support height.

Compared with the prior art, the invention has the following beneficial effects:

1. the self-moving can be realized without a supporting bracket carrier;

2. the single top plate has large supporting area and small specific pressure, better protects the integrity of the top plate of the supporting section and has higher safety;

3. compared with a portal bracket, the number of times of moving the bracket is less, and the operation efficiency is improved;

4. the base has large supporting area and higher stability, and is suitable for large inclination angle of a working surface;

5. the volume can be reduced, the operation is more flexible, and the adaptability is stronger; when the width of the roadway is narrowed due to the fact that the local part of the roadway has the rib and bulges, the temporary supporting equipment can adjust the height and the width of the corresponding frame to adapt to the actual width of the roadway for normal supporting;

6. the support can be realized without repeated support, and the deformation of the top plate in the repeated 'loading/unloading' process is avoided.

In a word, the technical scheme is adopted, the operation efficiency can be improved, the support equipment adopts stepping self-moving temporary support equipment, each temporary support equipment can realize volume reduction, support and stepping walking through a hydraulic control system, the matching of the crawler frame moving vehicle is reduced, the process flow is simplified, the operation efficiency and the mechanization degree are improved, the support strength and the stability are enhanced, and the adaptability is stronger. And the non-repeated support can be realized, the ordinary operation of digging, supporting, anchoring and transporting can be realized, the number of workers and the efficiency can be reduced, and the safety of the workers and the equipment can be improved. And the roadway can be supported without repetition.

Drawings

FIG. 1 is a schematic perspective view of the entire group of temporary support equipment;

FIG. 2 is a schematic structural view of a whole group of temporary supporting equipment in a supporting state;

FIG. 3 is a side view of the temporary support apparatus in a supporting state and in a retracted state;

FIG. 4 is a schematic perspective view of a temporary support equipment in a supporting state;

FIG. 5 is a schematic view of an inclined upward three-dimensional structure of the temporary supporting equipment in a supporting state;

fig. 6 is a schematic perspective view of the temporary support equipment in a contracted state;

FIG. 7 is a perspective view of a self-moving base member;

FIG. 8 is a perspective view of the left elevating base;

FIG. 9 is a perspective view of the right elevating base;

FIG. 10 is a flow chart of a self-moving base member walking process;

FIG. 11 is a schematic perspective view of a column member;

FIG. 12 is a schematic structural view of the support cylinder in a supporting state;

FIG. 13 is a schematic structural view of the support cylinder in a retracted state;

FIG. 14 is a flow chart of a temporary support equipment walking process;

FIG. 15 is a schematic side view of the temporary support facility of FIG. 14 during the walking process;

fig. 16 is a front view structural schematic diagram of the temporary support equipment in the process of shrinking;

fig. 17 is a front view structural diagram of a supporting process of the temporary supporting equipment.

In the figure, 1 is a self-moving base component, 1-1 is a sliding base, 1-2 is a left lifting base, 1-2-1 is a first outer lifting frame, 1-2-2 is a base lifting oil cylinder, 1-2-3 is an inner guide frame, 1-2-4 is a third lug seat, 1-3 is a right lifting base, 1-3-1 is a second outer lifting frame, 1-4 is a first lug seat, 1-5 is a first walking oil cylinder, 1-6 is a second walking oil cylinder, 1-7 is a second lug seat, 2 is an upright post component, 2-1 is an outer upright post frame, 2-2 is an inner upright post frame, 2-3 is an upright post lifting oil cylinder, 3 is a first top beam, 4 is a second top beam, 5-1 is a top beam connecting lug seat, 5-2 is an upright post connecting lug seat, 6 is a supporting oil cylinder, 6-1 is a fourth lug seat, 6-2 is a first supporting oil cylinder, 6-3 is a fifth lug seat, 6-4 is a second supporting oil cylinder, and 6-5 is a sixth lug seat.

Detailed Description

The invention is described in further detail below with reference to the figures and examples.

A stepping self-moving type temporary supporting device comprises a supporting oil cylinder 6, walking oil cylinders, lug seats, a top beam assembly and an upright post assembly 2, wherein the walking oil cylinders comprise first walking oil cylinders 1-5 and second walking oil cylinders 1-6, and the walking oil cylinders comprise: as shown in fig. 1, the stepping self-moving temporary support equipment in this embodiment is composed of 8 temporary support equipment, the specific number of the temporary support equipment is reasonably configured according to the total length of the heading machines of different models and the requirement of safe construction, and the temporary support equipment spans over the heading machines and is sequentially arranged along the heading advancing direction; the top beam assembly comprises a first top beam 3 and a second top beam 4, the head end and the tail end of the first top beam 3 are respectively hinged with one end of the second top beam 4 through top beam connecting lug seats 5-1, the other end of the second top beam 4 is hinged with the upright post assembly 2 through upright post connecting lug seats 5-2, the upright post assemblies 2 on two sides are oppositely arranged, and a self-moving base assembly 1 is arranged below the upright post assembly 2;

the self-moving base part 1 comprises a left lifting base 1-2, a right lifting base 1-3 and a sliding base 1-1, the left lifting base 1-2 and the right lifting base 1-3 are oppositely arranged at the head end and the tail end of the sliding base 1-1, and a second lug seat 1-7 for fixedly connecting with the upright post component 2 is arranged on the upper surface of the sliding base 1-1; the left lifting base 1-2 and the right lifting base 1-3 respectively comprise an outer lifting frame, a base lifting oil cylinder 1-2-2, an inner guide frame 1-2-3 and a third lug seat 1-2-4, the outer lifting frame is sleeved outside the inner guide frame 1-2-3, the base lifting oil cylinder 1-2-2 is arranged between the outer lifting frame and the inner guide frame 1-2-3, and the base lifting oil cylinder 1-2-2 drives the outer lifting frame to ascend or descend along the inner guide frame 1-2-3; the outer lifting frame in the left lifting base 1-2 is a first outer lifting frame 1-2-1, and the third ear seat 1-2-4 is arranged at the middle position of the inner side wall of the first outer lifting frame 1-2-1; the outer lifting frame in the right lifting base 1-3 is a second outer lifting frame 1-3-1, and a third ear seat 1-2-4 is arranged at the lower part of the inner side wall of the second outer lifting frame 1-3-1; the side wall of the sliding base 1-1 is provided with a first ear seat 1-4 corresponding to the horizontal position of the third ear seat 1-2-4; the second walking oil cylinders 1-6 are arranged above the first walking oil cylinders 1-5, the axial directions of the first walking oil cylinders 1-5 and the second walking oil cylinders 1-6 are parallel to each other, the directions of the first walking oil cylinders 1-5 and the second walking oil cylinders 1-6 are opposite, the cylinder barrels of the first walking oil cylinders 1-5 and the cylinder barrels of the second walking oil cylinders 1-6 are respectively and fixedly connected with the corresponding first lug seats 1-4, and the piston rods of the first walking oil cylinders 1-5 and the piston rods of the second walking oil cylinders 1-6 are respectively and fixedly connected with the corresponding third lug seats 1-2-4;

the upright post component 2 comprises an outer upright post frame 2-1, an inner upright post frame 2-2 and an upright post lifting oil cylinder 2-3, the outer upright post frame 2-1 is sleeved outside the inner upright post frame 2-2, the inner upright post frame 2-2 plays a lifting guide role for the outer upright post frame 2-1 to ensure the stable support of the upright post component 2, the upright post lifting oil cylinders 2-3 are symmetrically arranged below two ends of the outer upright post frame 2-1, a cylinder barrel of the upright post lifting oil cylinder 2-3 is fixedly connected with a second lug seat 1-7, a piston rod of the upright post lifting oil cylinder 2-3 is fixedly connected with two ends of the outer upright post frame 2-1, and the upright post lifting oil cylinder 2-3 drives the outer upright post frame 2-1 to ascend or descend along the inner upright post frame 2-2;

support oil cylinders 6 are arranged between the upper portions of the upright post assemblies 2 on the two sides and the top beam assembly respectively, each support oil cylinder 6 comprises a first support oil cylinder 6-2 and a second support oil cylinder 6-4, a fourth lug seat 6-1 is fixedly installed on the upper portions of the upright post assemblies 2, a sixth lug seat 6-5 is fixedly installed on the lower surface of the first top beam 3, a cylinder barrel of the first support oil cylinder 6-2 is hinged to the fourth lug seat 6-1, a piston rod of the first support oil cylinder 6-2 and a piston rod of the second support oil cylinder 6-4 are hinged to the fifth lug seat 6-3, the fifth lug seat 6-3 is fixedly installed on the lower surface of the second top beam 4, and a cylinder barrel of the second support oil cylinder 6-4 is hinged to the sixth lug seat 6-5.

Further, when the temporary support equipment is in a supporting state, the self-moving base component 1 is a bearing component and bears the pressure of a top plate and the reaction force of a bottom plate, and the pressure of the top plate is transmitted to the self-moving base component 1 through a top beam component and an upright column component; when the temporary supporting equipment is in a moving state, the self-moving base part 1 drives the tail end temporary supporting equipment to integrally advance and move until the tail end temporary supporting equipment moves to the head-on position of a working face.

Furthermore, the cylinder barrel of the base lifting oil cylinder 1-2-2 is fixedly connected with the top surface of the corresponding outer lifting frame, and the piston rod of the base lifting oil cylinder 1-2-2 is fixedly connected with the bottom surface of the inner guide frame 1-2-3.

Further, when the temporary support equipment is in a supporting state, the upright post lifting oil cylinder 2-2 extends to the maximum stroke position to push the top beam assembly to lift the supporting top plate, the first supporting oil cylinder 6-2 is in a zero stroke position, and the second supporting oil cylinder 6-4 is in a maximum stroke position; when the temporary support equipment is in a contraction state, the upright post lifting oil cylinder 2-2 is retracted to a zero stroke position to drive the top beam assembly to descend, and the first support oil cylinder 6-2 is at a maximum stroke position and the second support oil cylinder 6-4 is at a zero stroke position.

A supporting method of a stepping self-moving type temporary supporting device comprises the following steps:

s1, the extreme temporary support equipment is converted from the support state to the contraction state:

s1-1, the upright post lifting oil cylinder 2-3 falls back to the zero stroke position, and the overall height of the top beam assembly and the upright post assembly 2 is reduced;

s1-2, the first supporting oil cylinder 6-2 extends to a maximum stroke position, meanwhile, the second supporting oil cylinder 6-4 retracts to a zero stroke position, the second top beam 4 rotates inwards around the top beam connecting lug seat 5-1 to drive the self-moving base part 1 and the upright post part 2 on two sides of the extreme temporary supporting equipment to synchronously move inwards, the overall width of the extreme temporary supporting equipment is narrowed, the overall width of the extreme temporary supporting equipment in a contraction state is smaller than that of the extreme temporary supporting equipment in a support state, and the height of the top beam assembly is larger than that of the top beam assembly after the action of the step S1-1 and lower than that of the top beam assembly in the support state, so that the top beam assembly can smoothly pass through the lower part of the front support group;

s2, walking the most tail end temporary supporting equipment to the most front end position of the whole group of temporary supporting equipment:

s2-1, extending a piston rod of a first traveling oil cylinder 1-5 of the extreme temporary supporting equipment to push a right lifting base 1-3 to move forwards;

s2-2, lifting the base lifting oil cylinder 1-2-2, pushing the outer lifting frame to lift, and simultaneously synchronously lifting the sliding base 1-1, the upright post assembly 2 and the top beam assembly;

s2-3, retracting the first walking oil cylinder 1-5, extending the second walking oil cylinder 1-6, synchronously sliding the sliding base 1-1 forwards along with the second walking oil cylinder 1-6, and sliding the top beam assembly and the upright post assembly 2 of the temporary support equipment at the tail end forwards integrally;

s2-4, retracting the base lifting oil cylinder 1-2-2, descending the linkage outer lifting frame, synchronously descending the sliding base, and falling the top beam assembly and the upright post assembly 2 of the temporary support equipment at the tail end to the lowest position;

s2-5, retracting the second walking oil cylinder 1-6, synchronously sliding the left lifting base 1-2 forwards, and completing forward movement of the tail end temporary supporting equipment by one step;

s2-6, repeating the steps S2-1 to S2-5, and enabling the tail-most temporary supporting equipment to walk to the foremost position of the whole group of temporary supporting equipment, namely to the head-on position of the working face;

s3, the extreme temporary support equipment is converted from a contraction state to a support state: sequentially and reversely operating the steps S1-2 and S1-1 until the extreme temporary supporting equipment reaches the preset supporting height, lifting and supporting, and supporting the exposed top plate and two sides in time;

s4, repeating the steps S1-S3 by the temporary support equipment at the tail end after the heading machine cuts two coal.

The one-frame temporary support equipment has two steps of contraction action, five steps of walking action and two steps of support action, and the total nine steps of movement are taken as a complete movement cycle of one-time frame moving of the one-frame temporary support equipment. The whole group of temporary supporting equipment is moved from back to front alternately and circularly along with the coal cutting propulsion of the tunneling machine, so that the safe and efficient operation is ensured.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.