A drainage system for goaf areas in syncline mining areas

Abstract

The invention discloses a drainage system for goaf areas in a syncline structure mining area. The mining area includes goaf layers, rock layers and coal layers from top to bottom in sequence. A plurality of coal pillars are left in the goaf layers, and the coal pillars divide the goaf layers into a plurality of goaf areas. A return air chute and a transport chute are opened in the coal layer, and a connecting lane is opened to connect the return air chute and the transport chute. A drainage pipeline is arranged between any two adjacent goaf areas, and the drainage pipeline is connected with an upstream drainage pipe assembly, a connecting water pipe and a downstream drainage pipe assembly in sequence from upstream to downstream, and the upstream drainage pipe assembly and the downstream drainage pipe assembly are both installed in the drainage through hole. The invention has the beneficial effects of forming a self-flowing drainage system from top to bottom in the goaf areas of the entire mining area, and designing a unified water tank, thereby reducing the number of water tanks and forming a more unified drainage system, simplifying the complex, saving the cost of drainage equipment and drainage personnel, and improving the mining efficiency.

Description

Technical field:

[0001] The invention relates to the technical field of extraction equipment, and in particular to a drainage system for a goaf area in a syncline structure mining area. Background technology:

[0002] In the process of mining in syncline coal seam underground mines, water will accumulate in the goaf after the upper coal seam is mined. In order to ensure production safety, it is necessary to drain this part of the accumulated water. In the prior art, a mining area usually includes multiple coal seams from top to bottom. The existing drainage process requires the construction of a water tank in each return air chute or transport chute, and then the accumulated water is discharged through the water tank. This drainage system has the following disadvantages: 1. There are too many water tanks, and the water tanks are designed below the tunnel, which seriously affects the excavation progress, increases costs, and reduces mining efficiency; the drainage system is complicated, which increases equipment costs and manual management; 2. The construction of drainage holes in the drainage system is a construction of the drainage system. The difficulty is that, because the drainage hole is very deep, the drainage pipe laid in the drainage hole is composed of many sections. In the prior art, in order to ensure the concentricity of the drainage pipe, the aperture of the drainage hole needs to be very close to the diameter of the drainage pipe, which makes the laying of the drainage pipe extremely difficult (since the gap between the drainage hole and the drainage pipe is very small, the drainage pipe is often stuck or damaged during the laying process, the construction efficiency is low, and the construction quality of the drainage pipe is difficult to guarantee; if the diameter of the drainage hole is much larger than the diameter of the drainage pipe, when laying the drainage pipe in the drainage hole, adjacent drainage pipes are likely to be misaligned, resulting in water leakage, posing a huge safety hazard). Summary of the invention:

[0003] The purpose of the present invention is to provide a drainage system for goaf areas in syncline mining areas.

[0004] The content of the present invention is: a drainage system for goaf areas in a syncline structure mining area, the mining area includes goaf layers, rock layers and coal seams from top to bottom in sequence, a number of coal pillars are left in the goaf layers, the coal pillars divide the goaf layers into a number of goaf areas, a return air chute and a transport chute are opened in the coal seam, a connecting lane is opened between the return air chute and the transport chute, a drainage pipeline is arranged between any two adjacent goaf areas, the drainage pipeline is connected with an upstream drainage pipe assembly, a connecting water pipe and a downstream drainage pipe assembly in sequence from upstream to downstream, the upstream drainage pipe assembly and the downstream drainage pipe assembly are both installed in a drainage through hole, the top of the drainage through hole is connected to the goaf area, and the bottom of the drainage through hole is connected to the The return air chute or the transport chute or the connecting tunnel are interconnected, the connecting water pipe is located in the return air chute or the transport chute or the connecting tunnel, a water valve and a flow meter are installed on the connecting water pipe, a main drainage hole is vertically opened in the goaf at the lowest position, the main drainage hole has the same structure as the drainage through hole, the bottom end of the main drainage hole is connected to the goaf of the next layer, a drainage pipe assembly is installed in the main drainage hole, the upstream drainage pipe assembly, the downstream drainage pipe assembly and the drainage pipe assembly have the same structure, the drainage pipe assembly located at the lowest end is connected to the water tank, an external drainage pipeline is installed obliquely upward in the water tank, the external drainage pipeline is installed in the main tunnel, and a water pump is installed on the external drainage pipeline.

[0005] Furthermore, the upstream drain pipe assembly is connected with a plurality of drain pipe units in sequence from top to bottom, and the drain pipe unit located at the lowest end is connected to the receiving pipe, and the drain pipe unit includes a drain pipe body, an upper joint cone is fixedly installed concentrically at one end of the drain pipe body, a center through hole is concentrically opened at the center of the upper joint cone, a chamfer is opened at the opening of the center through hole, a plurality of first water holes are evenly distributed in the circumferential direction on the end face of the upper joint cone, a sealing ring groove is also opened on the outer edge of the end face of the upper joint cone, and an elastic sealing ring is installed in the sealing ring groove; a lower joint cone is fixedly installed concentrically at the other end of the drain pipe body, second water holes matching the first water holes are evenly distributed in the circumferential direction on the end face of the lower joint cone, and a raised column is fixedly installed concentrically on the end face of the lower joint cone. The diameter of the raised column is smaller than the diameter of the central through hole, and three sliding grooves are evenly distributed along the circumferential direction on the outer circumferential surface of the raised column, and a sliding block is slidably connected in the sliding groove, and the outer end of the sliding block is arc-shaped, and three spring grooves are evenly distributed along the circumferential direction on the end surface of the raised column, and the spring groove is connected with the sliding groove, and a limiting block is vertically installed on the sliding block, and the limiting block is slidably connected with the spring groove, and a compression spring is installed in the spring groove, the outer end of the compression spring contacts the limiting block, and the inner end of the compression spring contacts the spring groove, and the outer end of the sliding block is provided with a guide angle; when the raised column is inserted into the central through hole of the adjacent drainage pipe unit and the end face of the sliding block contacts the end face of the upper joint cone, the elastic sealing ring is squeezed by the lower joint cone.

[0006] Furthermore, the drainage hole is a two-step stepped hole, the upper end diameter of the drainage hole is larger than the lower end diameter of the drainage hole, and the drainage pipe unit located at the bottom is in contact with the step surface of the drainage hole.

[0007] Furthermore, a distance between adjacent first water holes is less than times the diameter of the first water holes.

[0008] Furthermore, a sealing ring is fixedly installed on the top of the receiving tube, and the sealing ring is in contact with the drainage pipe unit located at the lowest end. An anchor ring is fixedly installed on the outer circumferential surface of the receiving tube, and a plurality of anchor holes are opened on the anchor ring. The anchor ring is anchored at the bottom end of the rock formation.

[0009] Furthermore, the upper joint cone at the top is located in the goaf, a sealing cover is screwed on the outer circumferential surface of the upper joint cone at the top, a water inlet groove is opened at the top of the sealing cover, and a filter screen is installed in the sealing cover.

[0010] The beneficial effects of the present invention are as follows: 1. The present invention forms a top-down gravity drainage system for the entire mining goaf by designing upstream drainage pipe assemblies, connecting water pipes, downstream drainage pipe assemblies, drainage pipe assemblies and other pipelines, and designs a unified water tank, which reduces the number of water tanks and forms a more unified drainage system, simplifying the complex, saving the economic cost of drainage equipment and drainage personnel, reducing the maintenance and management cost of equipment, and improving mining efficiency; at the same time, flow meters, water valves and other control and detection devices are installed on the pipeline, so that the amount of water accumulated in the goaf can be observed and pre-controlled; 2. A special drainage pipe assembly with automatic centering and automatic sealing functions is designed, which makes the construction of the drainage through hole easier and allows the construction diameter of the drainage through hole to be appropriately increased, which not only effectively increases the construction efficiency of the drainage pipeline, but also effectively guarantees the construction quality of the drainage pipeline, and is worthy of large-scale promotion and use. Description of the drawings:

[0011] Figure 1 It is a schematic diagram of the drainage system structure of the present invention;

[0012] Figure 2 It is a schematic diagram of the structure of the local drainage system of the present invention;

[0013] Figure 3 is a cross-sectional view of an upstream drain pipe assembly of the present invention;

[0014] Figure 4 for Figure 3 A schematic diagram of the enlarged structure of part A;

[0015] Figure 5 for Figure 3 A schematic diagram of the enlarged structure of part B;

[0016] Figure 6 for Figure 3 Schematic diagram of the enlarged structure of part C;

[0017] Figure 7 is a perspective view of a drainage pipe unit of the present invention;

[0018] Figure 8 It is a stereoscopic view of the drainage pipe unit of the present invention from other viewing angles;

[0019] In the figure, goaf 1, rock layer 2, coal seam 3, coal pillar 4, goaf 5, return air chute 6, transport chute 7, connecting tunnel 8, upstream drainage pipe assembly 9, connecting water pipe 10, downstream drainage pipe assembly 11, drainage through hole 12, drainage pipe assembly 13, water tank 14, external discharge pipeline 15, drainage pipe unit 16, receiving pipe 17, upper joint cone 18, center through hole 19, first water hole 20, elastic sealing ring 21, lower joint cone 22, second water hole 23, raised column 24, sliding block 25, water inlet trough 26, limit block 27, compression spring 28, guide angle 29, sealing ring 30, anchor ring 31, sealing cover 32, filter screen 33, drainage pipe body 34. Specific implementation method:

[0020] like Figure 1 and Figure 2 As shown, a drainage system for goaf areas in a syncline structure mining area, the mining area includes goaf 1, rock layer 2 and coal seam 3 from top to bottom, a plurality of coal pillars 4 are left in the goaf 1, the coal pillars 4 divide the goaf 1 into a plurality of goaf areas 5, a return air chute 6 and a transport chute 7 are opened in the coal seam 3, a connecting lane 8 is opened between the return air chute 6 and the transport chute 7, a drainage pipeline is arranged between any two adjacent goaf areas 5, the drainage pipeline is connected with an upstream drainage pipe assembly 9, a connecting water pipe 10 and a downstream drainage pipe assembly 11 from upstream to downstream, the upstream drainage pipe assembly 9 and the downstream drainage pipe assembly 11 are both installed in a drainage through hole 12, the top of the drainage through hole 12 is connected to the goaf 5, and the bottom of the drainage through hole 12 is connected to the return air chute 6. The trough 6 or the transport chute 7 or the connecting lane 8 are connected, the connecting water pipe 10 is located in the return air chute 6 or the transport chute 7 or the connecting lane 8, a water valve and a flow meter are installed on the connecting water pipe, a drainage main hole is opened vertically downward in the goaf 5 at the lowest position, the drainage main hole has the same structure as the drainage through hole 12, the bottom end of the drainage main hole is connected to the goaf 5 of the next layer, a drainage pipe assembly 13 is installed in the drainage main hole, the upstream drainage pipe assembly 9, the downstream drainage pipe assembly 11, and the drainage pipe assembly 13 have the same structure, the drainage pipe assembly 13 located at the lowest end is connected to the water tank 14, the water tank 14 is inclined upward with an external discharge pipeline 15, the external discharge pipeline 15 is installed in the main lane, and a water pump is installed on the external discharge pipeline 15; Figures 3 to 8As shown, the upstream drain pipe assembly 9 is connected with a plurality of drain pipe units 16 in sequence from top to bottom, the drain pipe unit 16 at the lowermost end is connected with the receiving pipe 17, the drain pipe unit 16 comprises a drain pipe body 34, an upper joint cone 18 is fixedly installed concentrically at one end of the drain pipe body 34, a central through hole 19 is concentrically provided at the center of the upper joint cone 18, a chamfer is provided at the opening of the central through hole 19, a plurality of first water holes 20 are uniformly distributed along the circumferential direction on the end face of the upper joint cone 18, a sealing ring groove is also provided on the outer edge of the end face of the upper joint cone 18, an elastic sealing ring 21 is installed in the sealing ring groove; a plurality of first water holes 20 are uniformly distributed along the circumferential direction on the end face of the upper joint cone 18, a sealing ring groove is provided on the outer edge of the end face of the upper joint cone 18, an elastic sealing ring 21 is installed in the sealing ring groove; a plurality of first water holes 20 are uniformly distributed along the circumferential direction on the end face of the upper joint cone 18, ... A lower joint truncated cone 22 is fixedly installed, and a second water hole 23 matching the first water hole 20 is evenly distributed on the end surface of the lower joint truncated cone 22 in the circumferential direction. A raised column 24 is fixedly installed concentrically on the end surface of the lower joint truncated cone 22, and the diameter of the raised column 24 is smaller than the diameter of the central through hole 19. Three sliding grooves are evenly distributed on the outer circumferential direction of the raised column 24, and a sliding block 25 is slidably connected in the sliding groove. The outer end of the sliding block 25 is arc-shaped, and three spring grooves are evenly distributed on the end surface of the raised column 24 in the circumferential direction. The spring grooves are connected to the sliding grooves, and a limit block 27 is vertically installed on the sliding block 25. The limit The block 27 is slidably connected with the spring groove, and a compression spring 28 is installed in the spring groove. The outer end of the compression spring 28 contacts the limit block 27, and the inner end of the compression spring 28 contacts the spring groove. The outer end of the sliding block 25 is provided with a guide angle 29; when the protruding column 24 is inserted into the central through hole 19 of the adjacent drainage pipe unit 16 and the end face of the sliding block 25 contacts the end face of the upper joint cone 18, the elastic sealing ring 21 is squeezed by the lower joint cone 22; the drainage through hole 12 is a two-step stepped hole, the upper end diameter of the drainage through hole 12 is larger than the lower end diameter of the drainage through hole 12, and the drainage pipe unit 16 located at the bottom is connected to the drainage through hole 1 2; the spacing between adjacent first water holes 20 is less than 2 times the diameter of the first water holes 20; a sealing ring 30 is fixedly installed on the top of the receiving tube 17, and the sealing ring 30 is in contact with the drainage pipe unit 16 located at the lowest end, and an anchoring ring 31 is fixedly installed on the outer circumferential surface of the receiving tube 17, and a plurality of anchoring holes are opened on the anchoring ring 31, and the anchoring ring 31 is anchored at the bottom end of the rock formation 2; the upper joint cone 18 at the top is located in the goaf 5, and a sealing cover 32 is screwed on the outer circumferential surface of the upper joint cone 18 at the top, and a water inlet groove 26 is opened on the top of the sealing cover 32, and a filter screen 33 is installed in the sealing cover 32.

[0021] Working principle: During operation, the accumulated water in the goaf 5 enters the adjacent low-level goaf through the upstream drainage pipe assembly 9, the connecting water pipe 10, and the downstream drainage pipe assembly 11 in turn, and is finally collected in the water tank 14 through the drainage pipe assembly 13 for unified discharge; when constructing the drainage hole 12 and laying the drainage pipe assembly, first construct the stepped drainage hole 12, and then install several drainage pipe units 16 in the drainage hole 12. During installation, one end of the raised column 24 of the drainage pipe unit 16 is installed vertically downward. When the first drainage pipe unit 16 is placed, the lower joint truncated cone 22 is aligned with the drainage hole 12. The installation is completed when the through holes 12 are in contact, and then the other drainage pipe units 16 are installed in turn. During installation, as the raised column 24 and the sliding block 25 are inserted into the center through hole 19, when the lower joint cone 22 is felt to be against the upper joint cone 18 below, it is necessary to press down hard so that the elastic sealing ring 21 is compressed and sealed. At this time, the sliding block 25 just disengages from the center through hole 19 and is clamped on the lower end surface of the upper joint cone 18, thereby achieving limiting. During this installation process, the elastic sliding block 25 plays a good centering and sealing limiting role, ensuring that the pipeline is laid quickly and efficiently.

[0022] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A drainage system for a goaf area in a syncline structure mining area, wherein the mining area comprises a goaf layer (1), a rock layer (2) and a coal seam (3) from top to bottom, a plurality of coal pillars (4) are left in the goaf layer (1), and the coal pillars (4) divide the goaf layer (1) into a plurality of goaf areas (5), a return air chute (6) and a transport chute (7) are opened in the coal seam (3), and a connecting tunnel (8) is opened to connect the return air chute (6) and the transport chute (7), characterized in that: A drainage pipeline is provided between any two adjacent goafs (5), and the drainage pipeline is connected with an upstream drainage pipe assembly (9), a connecting water pipe (10) and a downstream drainage pipe assembly (11) in sequence from upstream to downstream. The upstream drainage pipe assembly (9) and the downstream drainage pipe assembly (11) are both installed in a drainage hole (12). The top end of the drainage hole (12) is connected to the goaf (5), and the bottom end of the drainage hole (12) is connected to the return air chute (6) or the transport chute (7) or the connecting tunnel (8). The connecting water pipe (10) is located in the return air chute (6) or the transport chute (7) or the connecting tunnel (8). A water valve and a flow meter are provided. A drainage main hole is opened vertically downward in the goaf (5) at the lowest position. The drainage main hole has the same structure as the drainage through hole (12). The bottom end of the drainage main hole is connected to the goaf (5) of the next layer. A drainage pipe assembly (13) is installed in the drainage main hole. The upstream drainage pipe assembly (9), the downstream drainage pipe assembly (11) and the drainage pipe assembly (13) have the same structure. The drainage pipe assembly (13) at the lowest end is connected to a water tank (14). An external discharge pipeline (15) is installed in the water tank (14) in an inclined manner. The external discharge pipeline (15) is installed in the main tunnel. A water pump is installed on the external discharge pipeline (15).

2. The drainage system for goaf in a syncline mining area according to claim 1, characterized in that: The upstream drainage pipe assembly (9) is connected to a plurality of drainage pipe units (16) in sequence from top to bottom, the drainage pipe unit (16) at the lowest end is connected to a receiving pipe (17), the drainage pipe unit (16) comprises a drainage pipe body (34), an upper joint truncated cone (18) is fixedly mounted concentrically at one end of the drainage pipe body (34), a central through hole (19) is concentrically opened at the center of the upper joint truncated cone (18), a chamfer is opened at the opening of the central through hole (19), and a chamfer is opened at the end surface of the upper joint truncated cone (18) along the circumference. A plurality of first water holes (20) are evenly distributed in the direction, and a sealing ring groove is also provided on the outer edge of the end surface of the upper joint truncated cone (18), and an elastic sealing ring (21) is installed in the sealing ring groove; a lower joint truncated cone (22) is fixedly installed concentrically at the other end of the drainage pipe body (34), and second water holes (23) matching the first water holes (20) are evenly distributed in the circumferential direction on the end surface of the lower joint truncated cone (22), and a protruding column (24) is fixedly installed concentrically on the end surface of the lower joint truncated cone (22), and the protruding column (24) is fixedly installed concentrically on the end surface of the lower joint truncated cone (22). The diameter of the column (24) is smaller than the diameter of the central through hole (19); three sliding grooves are evenly distributed along the circumferential direction on the outer circumferential surface of the protruding column (24); a sliding block (25) is slidably connected in the sliding groove; the outer end of the sliding block (25) is arc-shaped; three spring grooves are evenly distributed along the circumferential direction on the end surface of the protruding column (24); the spring grooves are connected to the sliding grooves; a limit block (27) is vertically installed on the sliding block (25); the limit block (27) is slidably connected to the spring groove; The spring groove is provided with a compression spring (28), the outer end of the compression spring (28) is in contact with the limit block (27), the inner end of the compression spring (28) is in contact with the spring groove, and the outer end of the sliding block (25) is provided with a guide angle (29); when the protruding column (24) is inserted into the central through hole (19) of the adjacent drainage pipe unit (16) and the end face of the sliding block (25) is in contact with the end face of the upper joint cone (18), the elastic sealing ring (21) is squeezed by the lower joint cone (22).

3. The drainage system for goaf in a syncline mining area according to claim 2, characterized in that: The drainage hole (12) is a two-step stepped hole, the upper end diameter of the drainage hole (12) is larger than the lower end diameter of the drainage hole (12), and the drainage pipe unit (16) located at the bottom contacts the step surface of the drainage hole (12).

4. The drainage system for goaf in a syncline mining area according to claim 2, characterized in that: The distance between adjacent first water through holes (20) is less than twice the diameter of the first water through holes (20).

5. The drainage system for goaf in a syncline mining area according to claim 2, characterized in that: A sealing ring (30) is fixedly installed on the top of the receiving pipe (17), and the sealing ring (30) is in contact with the drainage pipe unit (16) located at the lowest end. An anchoring ring (31) is fixedly installed on the outer circumferential surface of the receiving pipe (17), and a plurality of anchoring holes are opened on the anchoring ring (31). The anchoring ring (31) is anchored to the bottom end of the rock layer (2).

6. The drainage system for goaf in a syncline mining area according to claim 2, characterized in that: The upper joint cone (18) at the top is located in the goaf (5), a sealing cover (32) is screwed on the outer circumferential surface of the upper joint cone (18) at the top, a water inlet groove (26) is provided at the top of the sealing cover (32), and a filter screen (33) is installed in the sealing cover (32).

Images