Roof cutting and pressure relief roadway protection structure for coal mine roof fracturing

Abstract

The utility model relates to the technical field of pressure relief roadway protection, in particular to a coal mine roof fracturing roof cutting pressure relief roadway protection structure, which comprises a first support arm and a second support arm, the inner wall of the first support arm is rotatably connected with the second support arm, and the inner wall of the first support arm is rotatably connected with a first hydraulic cylinder. The ground cone is inserted into the second fixing hole and the first fixing hole, so that the fixing base and the fixing plate are fixed to the ground of a coal mine, the top plate is supported through the supporting column and the auxiliary supporting column at the same time, the direction of roadway protection supporting force of the top plate on the coal mine is increased, and meanwhile the supporting leg drives the auxiliary supporting column to deflect on the supporting column; and when the auxiliary supporting column stops supporting the upper end of the coal mine, the second hydraulic cylinder contracts to pull the supporting column, and the end part of the supporting column drags the top plate to deflect on the second supporting arm, so that the surface of the upper end of the top plate relieves pressure on the top of the coal mine, the supporting strength of top plate fracturing, top cutting, pressure relief and roadway protection on the upper end at multiple angles is ensured, and the safety performance is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field technical field of pressure relief and roadway protection, and specifically relates to a coal mine roof fracturing roof cutting pressure relief and roadway protection structure. BACKGROUND

[0002] The roof cutting pressure relief coal pillarless mining technology is to use blasting technology to pre-split the roof, cut the roof along the empty mining area using the mining area pressure, form a short arm beam, use the broken and expanded collapsed rock in the empty mining area to support the structure of the overlying old roof rock mass, control the rotation and subsidence deformation of the old roof, and realize pressure relief.

[0003] For example, the special hydraulic support suitable for the roof cutting pressure relief automatic roadway forming coal pillarless mining technology with the authorization publication number "CN109113775A", although it solves the problem that the rear half of the machine tail is hysteresis due to the unilateral stress of the front half of the existing special hydraulic support suitable for the roof cutting pressure relief automatic roadway forming coal pillarless mining technology, the above-mentioned linkage connection method of the hydraulic system pipeline of the side pushing mechanism reduces the number of rubber pipes and valve groups, improves the automation degree of the hydraulic support, reduces the operation difficulty, and has good popularization prospect, but the existing special hydraulic support suitable for the roof cutting pressure relief automatic roadway forming coal pillarless mining technology only uses the hydraulic system to support the upper end without other structures for support, which cannot guarantee the state of the roof fracturing roof cutting pressure relief and roadway protection supporting force of the hydraulic system to the upper end, resulting in low safety performance. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the problem that the existing special hydraulic support suitable for the roof cutting pressure relief automatic roadway forming coal pillarless mining technology cannot guarantee the state of the roof fracturing roof cutting pressure relief and roadway protection supporting force of the hydraulic system to the upper end, resulting in low safety performance, and proposes a coal mine roof fracturing roof cutting pressure relief and roadway protection structure.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a coal mine roof fracturing roof cutting pressure relief and roadway protection structure, which comprises a first supporting arm and a second supporting arm, the inner wall of the first supporting arm is rotationally connected with the second supporting arm, the inner wall of the first supporting arm is rotationally connected with a first hydraulic cylinder, the output end of the first hydraulic cylinder is rotationally connected with the second supporting arm, and the inner wall of the first supporting arm is connected with a fixing mechanism.

[0006] Preferably, the fixing mechanism comprises a fixing seat, the outer wall of the fixing seat is rotationally connected with the first supporting arm, the inner wall of the fixing seat is slidingly connected with a fixing plate, the outer side of the fixing strip is fixedly connected with a square strip, the outer wall of the square strip is slidingly connected with the fixing seat, and the inner wall of the fixing plate is processed with a first fixing hole.

[0007] Preferably, the outer wall of the fixing base is fixedly connected with a connecting block, the inner wall of the connecting block is processed with a second fixing hole, and the end of the second supporting arm is connected with a pressure relief mechanism.

[0008] Preferably, the pressure relief mechanism comprises a top plate, the end of the top plate is rotationally connected with the second supporting arm, the lower end of the top plate is rotationally connected with a supporting column, the outer wall of the supporting column is fixedly connected with an auxiliary supporting column, and the end of the auxiliary supporting column is fixedly connected with a supporting leg.

[0009] Preferably, the end of the supporting column is rotationally connected with a second hydraulic cylinder.

[0010] Preferably, the upper end of the fixing base is provided with the second hydraulic cylinder.

[0011] The coal mine roof fracturing roof cutting pressure relief and lane protection structure has the beneficial effects that the fixing base and the fixing plate are fixed to the coal mine ground through the insertion of the ground cone into the second fixing hole and the first fixing hole, the roof is supported by the supporting column and the auxiliary supporting column at the same time, the direction of the lane protection and support force of the roof to the coal mine is increased, the auxiliary supporting column is deflected on the supporting column driven by the supporting leg, the auxiliary supporting column stops supporting the upper end of the coal mine, the supporting column is pulled by the contraction of the second hydraulic cylinder, the end of the supporting column pulls the roof to deflect on the second supporting arm, the surface of the upper end of the roof releases the pressure of the top of the mine, the roof fracturing roof cutting pressure relief and lane protection supporting force of the upper end at multiple angles is ensured, and the safety performance is improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a structural schematic view of the utility model;

[0013] Figure 2 It is Figure 1 It is a structural schematic view of the utility model;

[0014] Figure 3 It is Figure 1 It is a structural schematic view of the utility model;

[0015] Figure 4 It is Figure 2 It is an enlarged structural schematic view of A in the utility model;

[0016] Figure 5 It is Figure 2 It is an enlarged structural schematic view of B in the utility model;

[0017] Figure 6 It is Figure 1 It is an enlarged structural schematic view of the first supporting arm in the utility model.

[0018] In the figure: 1, the first support arm, 2, the second support arm, 3, the first hydraulic cylinder, 4, the fixed mechanism, 401, the fixed seat, 402, the fixed plate, 403, the square bar, 404, the first fixed hole, 5, the connecting block, 6, the second fixed hole, 7, the pressure relief mechanism, 701, the top plate, 702, the support column, 703, the auxiliary support column, 704, the support leg, 8, the second hydraulic cylinder. DETAILED DESCRIPTION

[0019] The utility model will be further described below in combination with the drawings:

[0020] Example 1:

[0021] Please refer to Figures 1-6 : in this embodiment, a coal mine roof fracturing roof unloading and roadway protection structure, including first support arm 1 and second support arm 2, the inner wall of first support arm 1 is rotatably connected with second support arm 2, the inner wall of first support arm 1 is rotatably connected with first hydraulic cylinder 3, the model of first hydraulic cylinder 3 is according to actual demand, just meet the work, the output end of first hydraulic cylinder 3 is rotatably connected with second support arm 2, the inner wall of first support arm 1 is connected with fixed mechanism 4.

[0022] Fixed mechanism 4 includes fixed seat 401, is inserted into second fixed hole 6 and first fixed hole 404 through the ground cone, so that fixed seat 401 and fixed plate 402 are fixed with coal mine ground, the outer wall of fixed seat 401 is rotatably connected with first support arm 1, the inner wall of fixed seat 401 is slidably connected with fixed plate 402, the outer side of fixed plate 402 is fixedly connected with square bar 403, the outer wall of square bar 402 is slidably connected with fixed seat 401, and the inner wall of fixed plate 402 is processed with first fixed hole 404.

[0023] The outer wall of fixed seat 401 is fixedly connected with connecting block 5, the inner wall of connecting block 5 is processed with second fixed hole 6, the end of second support arm 2 is connected with pressure relief mechanism 7, the auxiliary support column 703 is deflected on the support column 702 by the support leg 704, and the support column 702 is rotatable at the lower end of the top plate 701, so that the top plate 701 loses the overall support force, and the effect of unloading the upper end of the top plate 701 is achieved, and the pressure relief mechanism 7 includes the top plate 701, the end of the top plate 701 is rotatably connected with the second support arm 2, the lower end of the top plate 701 is rotatably connected with the support column 702, the outer wall of the support column 702 is fixedly connected with the auxiliary support column 703, and the end of the auxiliary support column 703 is fixedly connected with the support leg 704.

[0024] The ground cone is inserted into the second fixing hole 6 and the first fixing hole 404, the fixing seat 401 and the fixing plate 402 are fixed with the coal mine ground, the roof 701 is supported through the support column 702 and the auxiliary support column 703, the direction of the roof 701 supporting the coal mine is increased, the auxiliary support column 703 is deflected on the support column 702 driven by the support leg 704, the auxiliary support column 703 stops supporting the upper end of the coal mine, and the support column 702 is pulled by the contraction of the second hydraulic cylinder 8, the end of the support column 702 deflects the roof 701 on the second support arm 2, the surface of the upper end of the roof 701 is relieved of the pressure on the top of the mine, the roof pressure cracking cutting and pressure relief support of the upper end at multiple angles is ensured, and the safety performance is improved.

[0025] The end of the support column 702 is rotationally connected with the second hydraulic cylinder 8, the model of the second hydraulic cylinder 8 meets the work requirement, and the upper end of the fixing seat 401 is provided with the second hydraulic cylinder 8.

[0026] Working principle:

[0027] The fixed plate 402 slides on the fixing seat 401, and the square bars 403 on the fixed plate 402 also slide in the fixing seat 401, so that the contact area of the fixing seat 401 and the fixed plate 402 with the coal mine ground is increased, the ground cone is inserted into the second fixing hole 6 and the first fixing hole 404, the fixing seat 401 and the fixed plate 402 are fixed with the coal mine ground, the roof 701 is supported through the support column 702 and the auxiliary support column 703, the roof 701 supports the coal mine, and the coal mine is prevented from being cracked, the support leg 704 is hammered, the auxiliary support column 703 is deflected on the support column 702 driven by the support leg 704, the auxiliary support column 703 stops supporting the upper end of the coal mine, at this time, the second hydraulic cylinder 8 is only controlled to work, the support column 702 is pulled by the contraction of the second hydraulic cylinder 8, the end of the support column 702 deflects the roof 701 on the second support arm 2, the surface of the upper end of the roof 701 stops supporting the top of the mine, and other positions are replaced for pressure relief work, and the first hydraulic cylinder 3 is contracted to reduce the included angle between the first support arm 1 and the second support arm 2, and the height of the first support arm 1 and the second support arm 2 is also reduced, so that the carrying and transportation are more convenient.

[0028] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A coal mine roof fracturing roof cutting pressure relief and roadway protection structure, comprising a first support arm (1) and a second support arm (2), the inner wall of the first support arm (1) is rotationally connected with the second support arm (2), characterized in that: The inner wall of the first support arm (1) is rotationally connected with a first hydraulic cylinder (3), the output end of the first hydraulic cylinder (3) is rotationally connected with a second support arm (2), and the inner wall of the first support arm (1) is connected with a fixing mechanism (4).

2. The coal mine roof fracturing top-removing pressure-releasing and roadway-protecting structure according to claim 1, characterized in that: The fixing mechanism (4) comprises a fixing seat (401), the outer wall of the fixing seat (401) is rotationally connected with the first support arm (1), the inner wall of the fixing seat (401) is slidingly connected with a fixing plate (402), the outer side of the fixing plate (402) is fixedly connected with a square strip (403), the outer wall of the square strip (403) is slidingly connected with the fixing seat (401), and the inner wall of the fixing plate (402) is processed with a first fixing hole (404).

3. The coal mine roof fracturing top-removing pressure-releasing and roadway-protecting structure according to claim 2, characterized in that: The outer wall of the fixing seat (401) is fixedly connected with a connecting block (5), the inner wall of the connecting block (5) is processed with a second fixing hole (6), and the end of the second support arm (2) is connected with a pressure relief mechanism (7).

4. The coal mine roof fracturing top-removing pressure-releasing and gateway-protecting structure according to claim 3, characterized in that: The pressure relief mechanism (7) comprises a top plate (701), the end of the top plate (701) is rotationally connected with the second support arm (2), the lower end of the top plate (701) is rotationally connected with a support column (702), the outer wall of the support column (702) is fixedly connected with an auxiliary support column (703), and the end of the auxiliary support column (703) is fixedly connected with a support leg (704).

5. The coal mine roof fracturing top-removing pressure-releasing and roadway-protecting structure according to claim 4, characterized in that: The end of the support column (702) is rotationally connected with a second hydraulic cylinder (8).

6. The coal mine roof fracturing top-removing pressure-releasing and entry-protecting structure according to claim 2, characterized in that: The upper end of the fixing seat (401) is provided with the second hydraulic cylinder (8).

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