Flexible mold bag unfolding device and method in underground goaf of coal mine

Abstract

The invention discloses a device and method for unfolding a flexible mold bag in an underground goaf of a coal mine, and belongs to the technical field of coal mine safety, the device comprises an anchor rod group used for fixing the flexible mold bag on a roadway coal wall and a suspension part fixed on a roadway top plate, the anchor rod group comprises a plurality of anchor rods, and the suspension part is used for fixing the flexible mold bag on the roadway coal wall. One end of the flexible mold bag is fixedly connected with the roadway coal wall through a plurality of anchor rods; one end of the suspension part is mounted at the top of a roadway coal wall, the other end of the suspension part is mounted on a roadway top plate far away from the roadway coal wall, a plurality of hanging rings are arranged on the suspension part, and the suspension part hangs the top of the flexible mold bag through the hanging rings; a rotating mechanism is arranged on the roadway top plate beside the hanging piece, a traction rope is arranged on the rotating mechanism, one end of the traction rope is connected with a hanging ring used for hanging the top of the other end of the flexible mold bag, and the other end of the traction rope is reserved outside the wind shielding curtain; according to the invention, the flexible mold bag can be conveniently, quickly and effectively unfolded in a dangerous environment in a goaf in a safe area of a roadway.

Description

Technical Field

[0001] The present invention belongs to the technical field of coal mine safety, and specifically relates to a flexible formwork bag deployment device and method in the goaf underground in a coal mine; in particular, it relates to the treatment of air leakage in the working face by using a flexible formwork bag in the goaf area at the corner of the working face. Background Technique

[0002] When shallow-buried coal seams are mined underground in a coal mine, fractures develop to the ground surface, resulting in relatively large air leakage on the ground surface; at the same time, the goaf at the corner of the working face does not collapse in time, there is a certain degree of hanging roof, and the air current leaks into or out of the goaf through the corner of the working face. Affected by these multiple air leakage factors above and below the well, the oxidation zone in the goaf becomes wider, and the risk of spontaneous combustion of residual coal increases; moreover, it is also easy to cause frequent occurrences of low oxygen phenomena in the return air corner of the working face, seriously threatening the safety of the staff in the mine.

[0003] Currently, the main technical measures for treating air leakage in the corner area are: hanging windbreak curtains, piling up sandbag walls, constructing high-level boreholes in the goaf at the corner for grouting and plugging, flexible formwork bag filling and plugging air leakage, etc. Among them, flexible formwork bag filling and plugging air leakage is to suspend the flexible formwork bag in the plugging area behind the support, connect the outlet of the grouting pipeline with the inlet of the formwork bag, and form a plugging and isolation wall by pouring isolation filling materials into the bag, so as to effectively cut off the gas migration channel in the goaf and effectively achieve the effect of reducing air leakage in the goaf.

[0004] Since the area behind the support is the goaf, which is a high-risk area; therefore, the area behind the windbreak curtain at the corner of the mine is a prohibited entry area, which makes it very difficult to hang a flexible formwork bag in the goaf. Even if the hanging is completed, it cannot be effectively deployed, and it cannot meet the ideal standards and requirements, thus resulting in an inability to achieve a good air leakage plugging effect. Summary of the Invention

[0005] The present invention aims at the above problems, makes up for the deficiencies of the prior art, and provides a brand-new flexible formwork bag deployment method and device in the goaf underground in a coal mine; to solve the problems raised in the above background technique: when using flexible formwork bag filling and plugging air leakage, due to the goaf behind the support being a prohibited entry area, the flexible formwork bag cannot be effectively deployed, resulting in great limitations when using this method for plugging air leakage, and it can no longer meet the safe and efficient production of the mine.

[0006] To achieve the above object, the present invention adopts the following technical solutions.

[0007] A flexible mold bag deployment device in a goaf underground in a coal mine provided by the present invention includes: an anchor rod group for fixing a flexible mold bag to a roadway coal wall respectively, and a suspension member fixed to the roadway roof. The anchor rod group includes a plurality of anchor rods, and one end of the flexible mold bag is fixedly connected to the roadway coal wall through the plurality of anchor rods; one end of the suspension member is installed at the top of the roadway coal wall, and the other end is installed on the roadway roof away from the roadway coal wall. A plurality of hanging rings are arranged on the suspension member, and the suspension member hangs the top of the flexible mold bag through the plurality of hanging rings; a rotating mechanism is arranged on the roadway roof beside the suspension member, and a traction rope is arranged on the rotating mechanism. One end of the traction rope is connected to the hanging ring for hanging the other end of the flexible mold bag at the top, and the other end of the traction rope is left outside the wind curtain.

[0008] As a preferred solution of the present invention, the suspension member includes a steel wire rope and a rope end fixing member. The rope end fixing members are respectively installed at the top of the roadway coal wall and on the roadway roof away from the roadway coal wall. The steel wire rope is fixedly connected between the two rope end fixing members, and a plurality of hanging rings are threaded on the steel wire rope, and the plurality of hanging rings can slide on the steel wire rope.

[0009] As another preferred solution of the present invention, the rope end fixing member includes an anchor bolt, an anchor rod body, a mounting seat and a fixing gasket. The anchor bolt is connected to the anchor rod body, and the anchor bolt and the anchor rod body are both threaded through the mounting seat. The anchor rod body is respectively embedded and fixed in the roadway coal wall and the roadway roof through the anchor bolt. The fixing gasket is sleeved on the anchor bolt. The rod body part of the anchor bolt between the mounting seat and the fixing gasket is a winding shaft, and the end of the steel wire rope is wound and fixed on the winding shaft. The mounting seat and the fixing gasket are fixedly connected through a fastening bolt and a nut.

[0010] As another preferred solution of the present invention, the rotating mechanism includes a pulley structure and an anchor plate. The anchor plate is fixedly installed on the roadway roof through an anchor rod, and the pulley structure is rotatably connected below the anchor plate through a rotating shaft. The traction rope is wound and connected to the pulley structure.

[0011] As another preferred solution of the present invention, the pulley structure includes a wheel body and wheel end baffles, and the wheel end baffles are connected to both ends of the wheel body.

[0012] A method for deploying a flexible mold bag in a goaf underground in a coal mine provided by the present invention includes:

[0013] In the roadway ahead of the working face, the flexible mold bag is arranged in advance. The top of the flexible mold bag is hung through the hanging rings on the suspension member arranged between the top of the roadway coal wall and the roadway roof, and one end of the flexible mold bag is fixed to the roadway coal wall through an anchor rod;

[0014] One end of the traction rope connected to the hanging ring is led out through the rotating mechanism, and a certain length is reserved to meet the subsequent folding and pulling requirements of the flexible mold bag;

[0015] After the flexible mold bag and the towing rope are both arranged, the flexible mold bag is folded on the roadway coal wall in a regular geometric manner. At the same time, one end of the towing rope connected to the hanging ring is also led to the roadway coal wall, and the other end of the towing rope is left outside the windbreak curtain.

[0016] As the working face advances, the pre-fixed flexible mold bag gradually enters the goaf. When it enters the goaf behind the support, by pulling the towing rope left outside the windbreak curtain, the flexible mold bag folded on the roadway coal wall can be effectively unfolded.

[0017] Advantages of the present invention:

[0018] 1. A flexible mold bag unfolding device and method in the goaf underground in a coal mine provided by the present invention can realize the convenient, rapid and effective unfolding of the flexible mold bag under dangerous environmental conditions in the goaf by personnel in the safe area of the roadway, eliminate the high-risk operation mode of workers in the goaf behind the support, improve the effect of gob corner plugging in the coal mine, and effectively ensure the safety of operators.

[0019] 2. The present invention is applicable to different geological conditions and roadway sizes. By arranging the flexible mold bag and the rotating mechanism in advance, the flexible mold bag can be fully unfolded in the goaf, improving the work efficiency, having strong versatility and operability, and promoting the method of filling and plugging air leakage with the flexible mold bag.

[0020] 3. The present invention uses anchor bolts, anchoring bolts and bolt bodies to fix the flexible mold bag, hanging parts and rotating mechanism, making the whole system stable and reliable, and greatly improving the success rate of filling and plugging air leakage with the flexible mold bag. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the description of the embodiments of the present application will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a schematic diagram of the overall structure of a flexible mold bag unfolding device in the goaf underground in a coal mine of the present invention.

[0023] Figure 2 It is Figure 1 A partial enlarged schematic diagram of A in

[0024] Figure 3 It is Figure 1 A partial enlarged schematic diagram of B in

[0025] Figure 4This is the top view of a flexible mold bag deployment device in the gob area underground in a coal mine after implementation underground in a coal mine according to the present invention.

[0026] Markings in the figure: 1. Roadway coal wall; 2. Anchor bolt; 3. Roadway roof; 4. Steel wire rope; 5. Suspension ring; 6. Traction rope; 7. Flexible mold bag; 8. Nut; 9. Mounting seat; 10. Winding shaft; 11. Fastening bolt; 12. Anchor bolt body; 13. Anchor bolt; 14. Fixed gasket; 15. Wheel body; 16. Rotating shaft; 17. Wheel end baffle; 18. Anchor plate; 19. Anchor hole; 20. Support; 21. Gob area; 22. Wind curtain. Specific implementation manners

[0027] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clear and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners. It should be understood that the specific implementation manners described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] As Figures 1 to 4 shown, a flexible mold bag deployment device in the gob area underground in a coal mine provided by an embodiment of the present invention includes: an anchor bolt group for fixing the flexible mold bag 7 to the roadway coal wall 1 respectively, and a suspension member fixed to the roadway roof 3. The anchor bolt group includes a plurality of anchor bolts 2. One end of the flexible mold bag 7 is fixedly connected to the roadway coal wall 1 through the plurality of anchor bolts 2, which can ensure the maximum fixing strength; one end of the suspension member is installed at the top of the roadway coal wall 1, and the other end is installed on the roadway roof 3 far from the roadway coal wall 1. A plurality of suspension rings 5 are provided on the suspension member, and the suspension member hangs the top of the flexible mold bag 7 through the plurality of suspension rings 5; a rotating mechanism is provided on the roadway roof 3 beside the suspension member, and a traction rope 6 is provided on the rotating mechanism. One end of the traction rope 6 is connected to the suspension ring 5 for hanging the other end top of the flexible mold bag 7, and the other end of the traction rope 6 is left outside the wind curtain 22.

[0029] Further, the suspension member includes a steel wire rope 4 and rope end fixing members. The rope end fixing members are respectively installed at the top of the roadway coal wall 1 and on the roadway roof 3 far from the roadway coal wall 1. The steel wire rope 4 is fixedly connected between the two rope end fixing members, and a plurality of suspension rings 5 are threaded on the steel wire rope 4, and the plurality of suspension rings 5 can slide on the steel wire rope 4.

[0030] Further, the rope end fixing member includes an anchor bolt 13, an anchor rod body 12, a mounting seat 9 and a fixing gasket 14. The anchor bolt 13 is connected to the anchor rod body 12. Both the anchor bolt 13 and the anchor rod body 12 are inserted through the mounting seat 9. The anchor rod body 12 is respectively embedded and fixed in the roadway coal wall 1 and the roadway roof 3 through the anchor bolt 13. The fixing gasket 14 is sleeved on the anchor bolt 13. The rod body part of the anchor bolt 13 between the mounting seat 9 and the fixing gasket 14 is the winding shaft 10. The end of the fixing steel wire rope 4 is wound and fixed on the winding shaft 10. The mounting seat 9 and the fixing gasket 14 are fixedly connected through a fastening bolt 11 and a nut 8.

[0031] Further, the rotating mechanism includes a pulley structure and an anchor plate 18. The anchor plate 18 is fixedly installed on the roadway roof 3 through an anchor bolt 2. The pulley structure is rotatably connected below the anchor plate 18 through a rotating shaft 16. The towing rope 6 is wound and connected to the pulley structure.

[0032] Further, the pulley structure includes a wheel body 15 and wheel end baffles 17. The wheel end baffles 17 are connected to both ends of the wheel body 15.

[0033] In addition, a method for unfolding a flexible formwork bag in a gob area underground in a coal mine provided by an embodiment of the present invention includes:

[0034] In a roadway ahead of the working face, a flexible formwork bag 7 is arranged in advance. The top of the flexible formwork bag 7 is hung by a hanging ring 5 on a hanging member between the top of the roadway coal wall 1 and the roadway roof 3, and one end of the flexible formwork bag 7 is fixed to the roadway coal wall 1 through an anchor bolt 2.

[0035] One end of the towing rope 6 connected to the hanging ring 5 is led out through the rotating mechanism, and a certain length is reserved to meet the subsequent folding and pulling requirements of the flexible formwork bag 7.

[0036] After the flexible formwork bag 7 and the towing rope 6 are both arranged, the flexible formwork bag 7 is folded on the roadway coal wall 1 in a regular geometric manner. At the same time, one end of the towing rope 6 connected to the hanging ring 5 is also led to the roadway coal wall 1. The other end of the towing rope 6 is left outside the windbreak curtain 22.

[0037] As the working face advances, the pre-fixed flexible formwork bag 7 gradually enters the gob area 21. When it enters the gob area 21 behind the support 20, by pulling the towing rope 6 left outside the windbreak curtain 22, the flexible formwork bag 7 folded on the roadway coal wall 1 is effectively unfolded to achieve the best blocking space; that is, it realizes that people can conveniently, quickly and effectively unfold the flexible formwork bag 7 under dangerous environmental conditions in the gob area 21 outside the windbreak curtain 22 (i.e., the safe area) in the roadway.

[0038] Specifically, a flexible formwork bag 7 is arranged in advance in the roadway ahead of the working face to ensure that the formwork bag 7 can gradually enter the goaf 21 as the working face advances; one end of the flexible formwork bag 7 is fixed to the roadway coal wall 1 by a bolt 2, and the fixing method of the bolt 2 is optimized to ensure that the flexible formwork bag 7 will not fall off or shift during the unfolding process, achieving the maximum fixing strength; the top of the flexible formwork bag 7 is hung on a steel wire rope 4 fixed to the roadway roof 3 through a hanging ring 5. One end of the steel wire rope 4 is fixed to the top of the roadway coal wall 1 through a rope end fixing piece, and the other end is fixed to the roadway roof 3 through a rope end fixing piece; before fixing, the bolt body 12 is embedded in the predetermined position through an anchor bolt 13, the steel wire rope 4 is wound around a winding shaft 10, and is fastened through a fastening bolt 11, a nut 8 and a fixing gasket 14 to ensure the stability of the steel wire rope 4. The length of the steel wire rope 4 between the two rope end fixing pieces corresponds to the length of the fully unfolded flexible formwork bag 7. One end of a towing rope 6 is connected and fixed to the hanging ring 5 at the top of the other end of the flexible formwork bag 7, and the towing rope 6 is led out through a pulley structure and a certain length is reserved; the rotating mechanism is composed of a pulley structure, a rotating shaft 16 and an anchor plate 18. The pulley structure is fixed to the roadway roof 3 through the anchor plate 18 and the bolt 2 to ensure that the towing rope 6 can slide smoothly and reduce the friction force; the length of the towing rope 6 is accurately calculated to ensure that it can extend to the roadway coal wall 1 after the flexible formwork bag 7 is folded, facilitating subsequent operations. After the flexible formwork bag 7 and the towing rope 6 are arranged, the flexible formwork bag 7 is folded on the roadway coal wall 1 in a regular geometric manner, and at the same time the towing rope 6 is led to the roadway coal wall 1. The folding method is optimized to ensure that the formwork bag 7 can be quickly and evenly spread out when unfolded. As the working face advances, the pre-fixed flexible formwork bag 7 gradually enters the goaf. When the flexible formwork bag 7 enters the goaf 21 behind the support 20, by pulling the towing rope 6, the flexible formwork bag 7 folded on the roadway coal wall 1 is effectively unfolded. The pulling operation of the towing rope 6 is realized through the pulley structure to ensure the smoothness and controllability of the unfolding of the formwork bag 7.

[0039] The working principle of the present invention: Based on the reasonable arrangement, fixing and unfolding method of the flexible formwork bag 7; determine the arrangement position of the flexible formwork bag 7 in advance in the roadway, and install fixing devices such as bolts 2, hanging parts and rotating mechanisms; fix one end of the flexible formwork bag 7 to the roadway coal wall 1 by a bolt 2, and hang the top of the flexible formwork bag 7 on the steel wire rope 4 of the hanging part through a hanging ring 5; connect a towing rope 6 to the hanging ring 5 at the top of the other end of the flexible formwork bag 7 and lead it out through the pulley structure of the rotating mechanism, and reserve an appropriate length; fold the flexible formwork bag 7 on the roadway coal wall 1 in a regular geometric manner, and lead the towing rope 6 to the roadway coal wall 1; as the working face advances, when the flexible formwork bag 7 enters the goaf 21 behind the support 20, unfold the flexible formwork bag 7 by pulling the towing rope 6.

[0040] In summary, through multiple designs such as fixing with bolts 2, hanging with steel wire ropes 4, and traction by pulley structures, the present invention ensures the stability and efficiency of the flexible formwork bag 7 during the unfolding process. The method for unfolding the flexible formwork bag in the goaf underground in coal mines of the present invention is to arrange the flexible formwork bag 7 in front of the working face by setting the steel wire rope 4, pulley structure, and traction rope 6. After the flexible formwork bag 7 enters the goaf 21 as the working face advances, people can conveniently, quickly, and effectively unfold the flexible formwork bag 7 under dangerous environmental conditions in the goaf 21 in the roadway (i.e., the safe area), improving the effect of sealing the corner in underground coal mines and effectively ensuring the safety of operators.

[0041] It can be understood that the above specific description of the present invention is only for explaining the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those of ordinary skill in the art should understand that the present invention can still be modified or equivalently replaced to achieve the same technical effects; as long as the use requirements are met, they are within the protection scope of the present invention.

Claims

1. A flexible formwork bag deployment device in the goaf underground in a coal mine, characterized in that: Including: An anchor rod group for fixing a flexible mold bag to the roadway coal wall respectively, and a suspension member fixed to the roadway roof. The anchor rod group includes a plurality of anchor rods, and one end of the flexible mold bag is fixedly connected to the roadway coal wall through the plurality of anchor rods; one end of the suspension member is installed at the top of the roadway coal wall, and the other end is installed on the roadway roof away from the roadway coal wall. A plurality of hanging rings are arranged on the suspension member, and the suspension member hangs the top of the flexible mold bag through the plurality of hanging rings; a rotating mechanism is arranged on the roadway roof beside the suspension member, and a towing rope is arranged on the rotating mechanism. One end of the towing rope is connected to the hanging ring for hanging the other end of the flexible mold bag at the top, and the other end of the towing rope is left outside the wind curtain.

2. The flexible mold bag deployment device in the goaf underground in a coal mine according to claim 1, characterized in that: The suspension member includes a steel wire rope and a rope end fixing member. The rope end fixing members are respectively installed at the top of the roadway coal wall and on the roadway roof away from the roadway coal wall. The steel wire rope is fixedly connected between the two rope end fixing members, and a plurality of hanging rings are threaded on the steel wire rope, and the plurality of hanging rings can slide on the steel wire rope.

3. The flexible mold bag deployment device in the gob area underground in a coal mine according to claim 2, characterized in that: The rope end fixing member includes an anchor bolt, an anchor rod body, a mounting seat and a fixing gasket. The anchor bolt is connected to the anchor rod body, and the anchor bolt and the anchor rod body are both threaded through the mounting seat. The anchor rod body is respectively embedded and fixed in the roadway coal wall and the roadway roof through the anchor bolt. The fixing gasket is sleeved on the anchor bolt. The rod body part of the anchor bolt between the mounting seat and the fixing gasket is a winding shaft, and the end of the steel wire rope is wound and fixed on the winding shaft. The mounting seat and the fixing gasket are fixedly connected through a fastening bolt and a nut.

4. A flexible mold bag deployment device in a gob area underground in a coal mine according to claim 3, characterized in that: The rotating mechanism includes a pulley structure and an anchor plate. The anchor plate is fixedly installed on the roadway roof through an anchor rod, and the pulley structure is rotatably connected below the anchor plate through a rotating shaft. The towing rope is wound and connected to the pulley structure.

5. The flexible mold bag deployment device in the gob area underground in a coal mine according to claim 3, wherein: The pulley structure includes a wheel body and wheel end baffles, and the wheel end baffles are connected to both ends of the wheel body.

6. A flexible mold bag deployment method in a gob area underground in a coal mine, characterized in that: Realized by using the flexible mold bag unfolding device in the goaf of the underground coal mine described in claim 1, including: In the roadway ahead of the working face, arrange the flexible mold bag in advance, hang the top of the flexible mold bag through the hanging rings on the suspension member between the top of the roadway coal wall and the roadway roof, and fix one end of the flexible mold bag to the roadway coal wall through an anchor rod; Lead out one end of the towing rope connected to the hanging ring through the rotating mechanism, and reserve a certain length to meet the subsequent folding and pulling requirements of the flexible mold bag; After the flexible mold bag and the towing rope are both arranged, fold the flexible mold bag on the roadway coal wall in a regular geometric manner. At the same time, one end of the towing rope connected to the hanging ring is also led to the roadway coal wall, and the other end of the towing rope is left outside the wind curtain; As the working face advances, the pre-fixed flexible mold bag gradually enters the goaf. When it enters the goaf behind the support, by pulling the towing rope left outside the wind curtain, the flexible mold bag folded on the roadway coal wall can be effectively unfolded.

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