A gangue collecting device for top cutting and lane retaining and its working method

Abstract

A gangue collecting device for top cutting and lane retention includes a plurality of hydraulic supports and net bags, each hydraulic support is arranged at intervals on the left and right sides of the coal mining face, a return air chute is arranged on the left side of the coal mining face, and a transport chute is arranged on the right side of the coal mining face. The net bag is arranged on the top of each hydraulic support and contacts the lower surface of the roof of the goaf, the right side of the net bag is fixed to the left side of the roof of the transport chute, and the left side of the net bag is naturally placed on the upper part of a hydraulic support far away from the transport chute. The structure of the present invention is simple. As the coal mining face advances, the gangue falling from the adjacent transport chute is blocked by the gangue blocking cloth between the gangue blocking beams. At the same time, the net bag can be tensioned to catch the gangue falling from the goaf to prevent the gangue from bending the gangue blocking beams, effectively covering and protecting the transport chute, so as to achieve the purpose of using the transport chute as the return air chute of the next section.

Description

Technical Field

[0001] The invention relates to the technical field of coal mining, in particular to a gangue collecting device for top cutting and lane retaining and a working method thereof. Background Art

[0002] In order to recycle the protective coal pillars left in the traditional mining method, certain technical means are used to re-support the transport chute of the previous section and leave it for the next section to use as a return air chute. This method of retaining a lane is to retain it along the edge of the goaf at the original transport chute position, which is called goaf-side lane retention. Goaf-side lane retention can maximize resource recovery and avoid coal body loss, but due to the pressure phenomenon in the goaf, the retained lanes need to be effectively protected to prevent gangue from falling and damaging the retained lanes. Therefore, a gangue-collecting device for top cutting and lane retention is urgently needed. Summary of the invention

[0003] The purpose of the present invention is to provide a gangue collecting device for top cutting and lane retention and a working method thereof. The present invention has a simple structure. As the coal mining face advances, the gangue falling from the adjacent transport chute is blocked by the gangue blocking cloth between the gangue blocking beams. At the same time, the net bag can be tensioned to catch the gangue falling from the goaf to prevent the gangue from bending the gangue blocking beams, effectively covering and protecting the transport chute, so as to achieve the purpose of using the transport chute as the return air chute of the next section.

[0004] To achieve the above object, the present invention adopts the following technical solution:

[0005] A gangue collecting device for top cutting and lane retention includes a plurality of hydraulic supports and net bags. The hydraulic supports are arranged at intervals on the left and right sides of the coal mining face. A return air chute is arranged on the left side of the coal mining face, and a transport chute is arranged on the right side of the coal mining face. The net bag is arranged on the top of each hydraulic support and contacts the lower surface of the roof of the goaf. The right side of the net bag is fixed to the left side of the roof of the transport chute, and the left side of the net bag is naturally placed on the upper part of a hydraulic support far away from the transport chute.

[0006] The net bag includes a wire mesh, a plurality of first steel wire ropes and a plurality of second steel wire ropes. The wire mesh is arranged below the roof of the goaf and contacts the lower surface of the roof of the goaf. Each first steel wire rope is arranged along the left-right direction and arranged side by side front and back. Each second steel wire rope is arranged along the front-back direction and arranged side by side left and right. Each first steel wire rope and each second steel wire rope are crisscrossed to form a wire rope net skeleton structure. The cross intersections of each first steel wire rope and each second steel wire rope are fixedly connected by a snap structure. The wire mesh covers the wire rope net skeleton and is tied and fixedly connected to the wire rope net skeleton. The left-right width of the wire mesh is approximately equal to the sum of the left-right widths of 3 to 4 hydraulic supports. The length of the first steel wire rope is approximately equal to the sum of the left-right widths of 7 to 8 hydraulic supports.

[0007] A number of rock-blocking beams are fixedly arranged at intervals in front and behind on one side of the transport chute adjacent to the goaf. The rock-blocking beams are arranged vertically, and the two ends of the rock-blocking beams are respectively fixed on the top plate and the bottom plate of the transport chute. A rock-blocking cloth is fixedly connected between two adjacent rock-blocking beams. A limiting beam is arranged in the front and rear horizontal directions on one side of the top plate of the transport chute adjacent to the goaf. The limiting beam is divided into several sections in front and behind, and the limiting beam is fixed to the top plate of the transport chute through an anchor cable structure used for supporting the top plate of the transport chute.

[0008] The right end of each first steel wire rope is connected to the limit beam from left to right, and the left end of each first steel wire rope is naturally placed on the upper part of a hydraulic support away from the transport chute and is covered with an anti-slip sheet. The right and left ends of each first steel wire rope are fixed with locks, and the lock on the right side is pressed tightly against the right side of the limit beam, and the lock on the left side is pressed tightly against the left side of the anti-slip sheet.

[0009] A working method of a gangue collecting device for top cutting and lane retaining, comprising the following steps:

[0010] (1) Arrange net bags, rock-blocking beams, rock-blocking cloths and limit beams under the roof of the goaf;

[0011] (2) As the coal mining face construction progresses, the roof of the goaf begins to collapse, and the collapsed gangue covers and presses on the net bag;

[0012] (3) The construction of the coal mining face is further advanced, and net bags, rock-blocking beams, rock-blocking cloths and limit beams are continuously arranged under the roof of the goaf to cover and protect the entire transport drift;

[0013] (4) Repeat steps (2) and (3).

[0014] Step (1) is specifically as follows: start to arrange the net bag, the net bag is located as a whole below the roof of the goaf and contacts the lower surface of the roof of the goaf, each rock retaining beam is fixed at intervals in front and back between the roof and the bottom plate on the side of the transport chute adjacent to the goaf, a rock retaining cloth is fixedly connected between two adjacent rock retaining beams, a limit beam is fixed to the top plate of the transport chute along the front and rear horizontal direction through an anchor cable structure for supporting the top plate of the transport chute, the right end of each first steel wire rope is connected to the limit beam from left to right and fixed by a lock, and the left end of each first steel wire rope is naturally placed on the upper part of a hydraulic support away from the transport chute.

[0015] Step (2) is specifically as follows: as the coal mining face advances, the net bag on the hydraulic support falls from the roof of the goaf to the bottom of the goaf. As the coal mining face further advances, the top of the goaf begins to collapse, and the collapsed gangue covers and presses on the net bag. The side of the net bag away from the transport chute is pressed against the bottom of the goaf. The gangue gradually presses the wire mesh, making the net bag a curved net with a lower left side and a higher right side and concave downward. The gangue falling from the adjacent transport chute is blocked by the gangue blocking cloth between the gangue blocking beams. The left end of each first steel wire rope slides to the right. After the anti-skid sheet on the left end of each first steel wire rope is pressed by the gangue, it is fixed to the bottom of the goaf under the action of the lock, so that the net bag is tensioned to hold the gangue falling from the goaf, avoiding the gangue from bending the gangue blocking beam, effectively covering and protecting the transport chute, so as to achieve the purpose of using the transport chute as the return air chute of the next section.

[0016] The present invention has a simple structure. With the advancement of the coal mining face, the gangue falling from the adjacent transport chute is blocked by the gangue blocking cloth between the gangue blocking beams. At the same time, the net bag can be tightened to catch the gangue falling from the goaf to prevent the gangue from bending the gangue blocking beams, effectively covering and protecting the transport chute, so as to achieve the purpose of using the transport chute as the return air chute of the next section. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a top view schematic diagram of the arrangement of the present invention in a coal mining working face.

[0018] Figure 2 It is a partial top view of one side of the adjacent transport chute of the present invention.

[0019] Figure 3 yes Figure 2 AA section view.

[0020] Figure 4 yes Figure 2 Middle BB section view.

[0021] Figure 5 yes Figure 2 CC section view.

[0022] Figure 6 yes Figure 2 Middle DD section view.

[0023] Figure 7 It is a structural schematic diagram of the wire mesh of the present invention.

[0024] Figure 8 It is a structural schematic diagram of the steel wire rope net skeleton structure of the present invention. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are further described below with reference to the accompanying drawings.

[0026] like Figure 1-8 As shown, a gangue collecting device for top cutting and lane retaining includes a plurality of hydraulic supports 1 and net bags. The hydraulic supports 1 are arranged at intervals on the left and right sides of a coal mining face 2. A return air chute 3 is arranged on the left side of the coal mining face 2, and a transport chute 4 is arranged on the right side of the coal mining face 2. The net bag is arranged on the top of each hydraulic support 1 and contacts the lower surface of the roof of the goaf. The right side of the net bag is fixed to the left side of the roof of the transport chute 4, and the left side of the net bag is naturally placed on the upper part of a hydraulic support 1 away from the transport chute 4.

[0027] The net bag includes a wire mesh 5, a plurality of first steel wire ropes 6 and a plurality of second steel wire ropes 7. The wire mesh 5 is arranged below the roof of the goaf and in contact with the lower surface of the roof of the goaf. Each first steel wire rope 6 is arranged along the left-right direction and arranged side by side front and back. Each second steel wire rope 7 is arranged along the front-back direction and arranged side by side left and right. Each first steel wire rope 6 and each second steel wire rope 7 are crisscrossed to form a wire rope net skeleton structure. The cross intersections of each first steel wire rope 6 and each second steel wire rope 7 are fixedly connected by a snap structure 8. The wire mesh 5 covers the wire rope net skeleton and is tied and fixedly connected to the wire rope net skeleton. The left and right width of the wire mesh 5 is approximately equal to the sum of the left and right widths of 3 to 4 hydraulic supports 1, and the length of the first steel wire rope 6 is approximately equal to the sum of the left and right widths of 7 to 8 hydraulic supports 1.

[0028] A plurality of rock-blocking beams 9 are fixedly arranged at intervals in front and behind on one side of the transport chute 4 adjacent to the goaf. The rock-blocking beams 9 are vertically arranged, and the two ends of the rock-blocking beams 9 are respectively fixed on the top plate and the bottom plate of the transport chute 4. A rock-blocking cloth 10 is fixedly connected between two adjacent rock-blocking beams 9. A limiting beam 11 is arranged in the front and rear horizontal direction on one side of the top plate of the transport chute 4 adjacent to the goaf. The limiting beam 11 is divided into several sections in the front and rear, and the limiting beam 11 is fixed to the top plate of the transport chute 4 through an anchor cable structure 15 used for supporting the top plate of the transport chute 4.

[0029] The right end of each first steel wire rope 6 is connected to the limiting beam 11 from left to right, and the left end of each first steel wire rope 6 is naturally placed on the upper part of a hydraulic support 1 away from the transport chute 4 and is provided with an anti-slip sheet 12. The right and left ends of each first steel wire rope 6 are fixedly provided with locks 13, and the lock 13 on the right side is pressed tightly against the right side surface of the limiting beam 11, and the lock 13 on the left side is pressed tightly against the left side surface of the anti-slip sheet 12.

[0030] In order to reduce the budget for purchasing equipment, the anti-slip sheet 12 generally uses the anchor cable or anchor rod end gasket used in mines.

[0031] A working method of a gangue collecting device for top cutting and lane retaining, comprising the following steps:

[0032] (1) Arrange net bags, rock-blocking beams 9, rock-blocking cloths 10 and limit beams 11 below the roof of the goaf;

[0033] (2) As the coal mining face construction progresses, the roof of the goaf begins to collapse, and the collapsed gangue 14 covers and presses on the net bag;

[0034] (3) The construction of the coal mining face is further advanced, and net bags, rock-blocking beams 9, rock-blocking cloths 10 and limit beams 11 are continuously arranged under the roof of the goaf to cover and protect the entire transport drift 4;

[0035] (4) Repeat steps (2) and (3).

[0036] Step (1) is specifically as follows: start to arrange the net bag, the net bag is located as a whole below the roof of the goaf and contacts the lower surface of the roof of the goaf, each rock retaining beam 9 is fixedly stood at intervals between the roof and the bottom plate of the transport chute 4 on the side adjacent to the goaf, a rock retaining cloth 10 is fixedly connected between two adjacent rock retaining beams 9, a limiting beam 11 is fixed to the top plate of the transport chute 4 along the front and rear horizontal direction through the anchor cable structure 15 used for supporting the top plate of the transport chute 4, the right end of each first steel wire rope 6 is connected to the limiting beam 11 from left to right and fixed by a lock 13, and the left end of each first steel wire rope 6 is naturally placed on the upper part of a hydraulic support 1 away from the transport chute 4.

[0037] Step (2) specifically includes: as the coal mining face 2 advances, the net bag on the hydraulic support 1 falls from the top plate of the goaf to the bottom plate of the goaf. As the coal mining face 2 further advances, the top plate of the goaf begins to collapse, and the collapsed gangue 14 covers and presses on the net bag, and the side of the net bag away from the transport chute 4 is pressed on the bottom plate of the goaf. The gangue 14 gradually presses the wire mesh 5, so that the net bag is low on the left and high on the right and concave downward. The gangue 14 falling from the adjacent transport chute 4 is The gangue blocking cloth 10 between the root gangue blocking beams 9 blocks the left end of each first steel wire rope 6 and slides to the right. The anti-slip sheet 12 on the left end of each first steel wire rope 6 is pressed by the gangue 14 and then fixed on the bottom plate of the goaf under the action of the lock 13, so that the net bag is tightened to catch the gangue 14 falling from the goaf, avoiding the gangue 14 from bending the gangue blocking beams 9, effectively covering and protecting the transport chute 4, so as to achieve the purpose of using the transport chute 4 as the return air chute 3 of the next section.

[0038] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A working method of a gangue collecting device for top cutting and lane retaining, characterized in that: The gangue collecting device for top cutting and lane retention comprises a plurality of hydraulic supports and net bags, each hydraulic support is arranged at intervals on the left and right sides of the coal mining working face, a return air chute is arranged on the left side of the coal mining working face, and a transport chute is arranged on the right side of the coal mining working face. The net bag is arranged on the top of each hydraulic support and contacts the lower surface of the roof of the goaf, the right side of the net bag is fixed on the left side of the roof of the transport chute, and the left side of the net bag is naturally placed on the upper part of a hydraulic support far away from the transport chute; The net bag includes a wire mesh, a plurality of first steel wire ropes and a plurality of second steel wire ropes. The wire mesh is arranged below the roof of the goaf and contacts the lower surface of the roof of the goaf. Each first steel wire rope is arranged in the left-right direction and arranged side by side in the front and back directions. Each second steel wire rope is arranged in the front-back direction and arranged side by side in the left and right directions. Each first steel wire rope and each second steel wire rope are crisscrossed to form a steel wire rope net skeleton structure. The cross intersections of each first steel wire rope and each second steel wire rope are fixedly connected by a buckle structure. The wire mesh covers the steel wire rope net skeleton and is tied and fixedly connected to the steel wire rope net skeleton. The left and right width of the wire mesh is equal to the sum of the left and right widths of 3 to 4 hydraulic supports. The length of the first steel wire rope is equal to the sum of the left and right widths of 7 to 8 hydraulic supports. A plurality of rock-blocking beams are fixedly arranged at intervals at the front and rear sides of the transport chute adjacent to the goaf. The rock-blocking beams are arranged vertically, and the two ends of the rock-blocking beams are respectively fixed to the top plate and the bottom plate of the transport chute. A rock-blocking cloth is fixedly connected between two adjacent rock-blocking beams. A limiting beam is arranged horizontally in the front and rear directions on the side of the top plate of the transport chute adjacent to the goaf. The limiting beam is divided into several sections in the front and rear sides, and the limiting beam is fixed to the top plate of the transport chute through an anchor cable structure used for supporting the top plate of the transport chute. The right end of each first steel wire rope is connected to the limit beam from left to right, and the left end of each first steel wire rope is naturally placed on the upper part of a hydraulic support far away from the transport chute and is covered with an anti-slip sheet. The right and left ends of each first steel wire rope are fixedly provided with locks, and the right lock is pressed tightly against the right side of the limit beam, and the left lock is pressed tightly against the left side of the anti-slip sheet. The working method comprises the following steps: (1) Arrange net bags, rock-blocking beams, rock-blocking cloths and limit beams under the roof of the goaf; (2) As the coal mining face construction progresses, the roof of the goaf begins to collapse, and the collapsed gangue covers and presses on the net bag; (3) The construction of the coal mining face is further advanced, and net bags, rock-blocking beams, rock-blocking cloths and limit beams are continuously arranged under the roof of the goaf to cover and protect the entire transport drift; (4) Repeat steps (2) and (3).

2. The working method of the gangue collecting device for top cutting and lane retaining according to claim 1 is characterized in that: Step (1) is specifically as follows: start to arrange the net bag, the net bag is located as a whole below the roof of the goaf and contacts the lower surface of the roof of the goaf, each rock retaining beam is fixed at intervals in front and back between the roof and the bottom plate on the side of the transport chute adjacent to the goaf, a rock retaining cloth is fixedly connected between two adjacent rock retaining beams, a limit beam is fixed to the top plate of the transport chute along the front and rear horizontal direction through an anchor cable structure for supporting the top plate of the transport chute, the right end of each first steel wire rope is connected to the limit beam from left to right and fixed by a lock, and the left end of each first steel wire rope is naturally placed on the upper part of a hydraulic support away from the transport chute.

3. The working method of the gangue collecting device for top cutting and lane retaining according to claim 1 is characterized in that: Step (2) is specifically as follows: as the coal mining face advances, the net bag on the hydraulic support falls from the roof of the goaf to the bottom of the goaf. As the coal mining face further advances, the top of the goaf begins to collapse, and the collapsed gangue covers and presses on the net bag. The side of the net bag away from the transport chute is pressed against the bottom of the goaf. The gangue gradually presses the wire mesh, making the net bag a curved net with a lower left side and a higher right side and concave downward. The gangue falling from the adjacent transport chute is blocked by the gangue blocking cloth between the gangue blocking beams. The left end of each first steel wire rope slides to the right. After the anti-skid sheet on the left end of each first steel wire rope is pressed by the gangue, it is fixed to the bottom of the goaf under the action of the lock, so that the net bag is tensioned to hold the gangue falling from the goaf, avoiding the gangue from bending the gangue blocking beam, effectively covering and protecting the transport chute, so as to achieve the purpose of using the transport chute as the return air chute of the next section.

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