A drilling type full wind pressure ventilation strip type coal mining device and coal mining method

Abstract

The present invention discloses a drilling type full wind pressure ventilation strip type coal mining device and a coal mining method, comprising a coal mining area and a tunnel, wherein the coal mining area is provided with a plurality of coal seam strips and a plurality of coal seam coal pillars distributed in the interlayers of the coal seam strips, an air inlet tunnel of the tunnel is provided at the lower part of the coal mining area, and a return air tunnel is provided at the upper part of the coal mining area; ventilation holes which are connected with the air inlet tunnel and the return air tunnel up and down are drilled by a drilling rig in the coal seam strips, an upper air door and an adjusting air window are provided in the upper return air tunnel of the coal pillar close to one side of the strip with the ventilation hole, and a lower air door and an adjusting air window are provided in the lower air inlet tunnel of the coal pillar, which are used for controlling the wind to flow up and down from the ventilation eyes; the present invention mainly arranges the working face according to the strip type branch tunnel in the whole coal mining section, and after the working face is formed, no local ventilator is needed for ventilation during the mining process, but effective full wind pressure ventilation is realized by the ventilation system of the whole mine; full wind pressure ventilation is realized in the strip type branch tunnel coal mining, and safe production is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of coal mining, and in particular to a drilling type full wind pressure ventilation strip type coal mining device and a coal mining method. Background Art

[0002] In actual mining, strip-type branch lane coal mining always needs to use local ventilators for ventilation. When the dual power supplies and dual fans of ventilation cannot be turned on for some reason, it will cause the mining to be unable to ventilate, resulting in the inability to remove harmful gases such as gas, and the inability of on-site workers to breathe oxygen, thus causing major hidden dangers and accidents. When mining operations are carried out in a dead-end lane such as a strip-type branch lane, a local ventilator must be used. Therefore, the strip-type branch lane coal mining method is not a full-pressure ventilation mining method. In fact, it is excavation instead of mining, which is very unfavorable for coal mine safety production. Therefore, it is urgent to design a drilled full-pressure ventilation strip-type coal mining device and coal mining method to solve the hidden dangers and accidents caused by poor ventilation in the coal mining process. Summary of the invention

[0003] In view of the problems existing in the prior art, the object of the present invention is to provide a drilling type full wind pressure ventilation strip type coal mining device and a coal mining method.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a drilled full-wind pressure ventilation strip-type coal mining device, including a coal mining area and a roadway, the coal mining area is provided with a plurality of coal seam strips, and a plurality of coal seam coal pillars distributed with the coal seam strip interlayers, the coal seam strips are provided with but not limited to strip one, strip two, strip three, strip four, and strip five, the coal seam coal pillars and between the strips one, strip two, strip three, strip four, and strip five are provided but not limited to coal pillar one, coal pillar two, coal pillar three, and coal pillar four, an air inlet roadway of the roadway is provided at the lower part of the coal mining area, a return air roadway is provided at the upper part of the coal mining area, one end of the return air roadway is connected to the return air roadway connecting roadway, a mining area uphill coal transportation roadway with the coal transportation direction upward is provided outside one side of the coal mining area, the mining area uphill coal transportation roadway is connected to the air inlet roadway and is staggered with the return air roadway;

[0005] Ventilation holes connecting the air inlet and return air lanes up and down are drilled in the coal seam strip by a drilling rig. An upper air door and an adjusting air window are provided in the upper return air lane of the coal pillar close to the side of the strip with the ventilation eyes, and a lower air door and an adjusting air window are provided in the lower air inlet lane of the coal pillar, which are used to control the upward and downward flow of air through the ventilation eyes.

[0006] Specifically, the coal mining area is mined in an overhand mining manner according to the inclination of the coal seam. The inclination of the coal seam is an overhand mining inclination, and the overhand mining inclination adopts a range of 4-20 degrees.

[0007] Specifically, the mining direction of the upward mining method is from the air inlet tunnel to the return air tunnel.

[0008] Specifically, the mining length of the coal seam strip from bottom to top is 50-80m, and the mining width of the coal seam strip is 4-15m.

[0009] Specifically, the mining angle between the coal seam strip and the air intake tunnel is 110-140 degrees.

[0010] Specifically, coal transportation equipment is installed in the uphill coal transportation tunnel and the air intake tunnel in the mining area to transport coal in the direction of coal transportation.

[0011] Specifically, the diameter of the ventilation eye is 0.4-1m.

[0012] A coal mining method using a drilling type full-wind pressure ventilation strip type coal mining device, comprising the following steps:

[0013] 1) The mining area completes strip one in an upward mining manner according to the inclination of the coal seam, installs a lower air door and an adjustable air window at the lower end of the coal pillar one, and installs an upper air door and an adjustable air window at the upper end of the coal pillar one; normal ventilation is from the air inlet lane to the lower air door and the adjustable air window, through the goaf of strip one to the upper air door and the adjustable air window, through the return air lane to the return air lane connecting lane, forming full air pressure ventilation;

[0014] 2) During the construction of mining strip 2, the drill is installed at the position of the air inlet tunnel facing the mining strip 2 and ventilation holes are drilled. The drill is drilled upward along the working surface of strip 2 until the entire strip 2 is penetrated;

[0015] 3) When the coal seam is hard and not prone to collapse, after the ventilation hole of strip 2 is penetrated and the drill rod is ready to be withdrawn, the short pipe is installed in the direction of the drill rod withdrawal as the drill rod is withdrawn. When the drill rod is completely withdrawn, the ventilation pipeline has been installed and laid in the entire borehole to form a ventilation hole;

[0016] 4) When the coal seam has a low hardness and is prone to collapse, the second strip is drilled from bottom to top through the drilling rig to drill a ventilation hole while the short pipe is placed on the outside of the drill rod and extended into the borehole along the direction of the drill rod. The drill rod is connected to increase the length. After drilling a section of the drill rod, the short pipe of the same length is installed at the same time. The ventilation pipeline has been fully installed and laid in the entire borehole to form a ventilation hole;

[0017] 5) At the same time, close the lower air door and the regulating air window, the upper air door and the regulating air window, and the fresh air flows along the air inlet lane, through the ventilation pipe in the second mining strip, and then through the return air lane, and then enters the return air lane connecting lane, thus forming full wind pressure ventilation;

[0018] 6) At the position of the air inlet roadway corresponding to the mining strip 2, mining equipment is used to carry out coal mining operations. As mining progresses, all the coal around the ventilation pipeline is mined. Every time the pipeline connection is mined, the ventilation pipeline is removed, and then coal mining continues. This is repeated until the entire strip 2 is mined. Full air pressure ventilation is always used during the mining of the entire strip 2;

[0019] 7) After strip 2 is mined, lower air doors and regulating air windows, upper air doors and regulating air windows are set at the upper and lower ends of coal pillar 2, which are the same as those at the upper and lower ends of coal pillar 1, so that the entire working face retains normal full-pressure ventilation;

[0020] 8) Install the drill rig at the position of the air inlet tunnel facing the mining strip three and start drilling ventilation holes. Repeat steps 2) to 7) to mine strip three. Repeat this process to complete strip mining of strip four, strip five, and even the entire working face.

[0021] The present invention has the following beneficial effects:

[0022] The drilled full-pressure ventilation strip coal mining device and method designed in the present invention mainly arranges the working face according to the strip-type branch tunnels in the entire coal mining section. After the working face is formed, no local fan is needed for ventilation during the mining process, but effective full-pressure ventilation is achieved by the ventilation system of the entire mine. There is no problem of ventilation failure when the dual power supplies and dual fans cannot be turned on for some reason when using local ventilation. Full-pressure ventilation is achieved in strip-type branch tunnel coal mining, which eliminates the risks and safety hazards brought by the use of local fans for ventilation to implement mining operations, achieves safe ventilation, and ensures safe production. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a drilled full-wind pressure ventilation strip-type coal mining device.

[0024] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure along the AA direction.

[0025] Figure 3 yes Figure 1 Schematic diagram of the cross-sectional structure along the BB direction.

[0026] In the figure: 1-uphill coal transportation tunnel in the mining area; 2-return air tunnel connecting tunnel; 3-inlet air tunnel; 4-return air tunnel; 5-mining direction; 6-upward mining inclination; 7-mining angle; 8-coal transportation direction; 9-lower air door and adjustable air window; 10-upper air door and adjustable air window; 11-ventilation eye; 12-strip one; 13-strip two; 14-strip three; 15-strip four; 16-strip five; 17-coal pillar one; 18-coal pillar two; 19-coal pillar three; 20-coal pillar four. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely further describe the technical solutions in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] like Figure 1-3 As shown, a drilled full-wind pressure ventilation strip-type coal mining device comprises a coal mining area and a roadway, wherein the coal mining area is provided with a plurality of coal seam strips and a plurality of coal seam coal pillars distributed in the interlayers of the coal seam strips, the coal seam strips are provided with but not limited to strip one 12, strip two 13, strip three 14, strip four 15, strip five 16 and are arranged in sequence and so on, and the coal pillars of the coal seam are sandwiched between the strips one 12, strip two 13, strip three 14, strip four 15, strip five 16 and are provided with but not limited to coal pillar one 17, coal pillar two 18, coal pillar three 19, coal pillar four 20 and are arranged in sequence and so on, an air inlet roadway 3 of the roadway is provided at the lower part of the coal mining area, a return air roadway 4 is provided at the upper part of the coal mining area, one end of the return air roadway 4 is connected to the return air roadway connecting roadway 2, and a mining area uphill coal transportation roadway 1 with the coal transportation direction upward is provided on the outside of one side of the coal mining area.

[0029] A ventilation hole 11 is drilled in the strip of the coal seam by a drilling rig to connect the air inlet lane 3 and the return air lane 4 up and down. An upper air door and an adjusting wind window 10 are provided in the upper return air lane 4 of the coal pillar close to the side of the strip with the ventilation hole 11, and a lower air door and an adjusting wind window 9 are provided in the lower air inlet lane 3 of the coal pillar, which are used to control the upward and downward flow of air from the ventilation eye 11.

[0030] The uphill coal transportation tunnel 1 in the mining area is connected to the air intake tunnel 3 and is staggered with the return air tunnel 4, so that wind enters the air intake tunnel 3 from the uphill coal transportation tunnel 1 in the mining area, and then enters the return air tunnel 4 through the lower air gate and regulating air window 9, the mined strip, the upper air gate and regulating air window 10 (or through the ventilation eye 11), and finally enters the return air tunnel connecting tunnel 2 to form full wind pressure ventilation.

[0031] The coal mining area is mined in an upward mining manner according to the inclination of the coal seam. The inclination of the coal seam is an upward mining inclination angle 6, and the upward mining inclination angle 6 is 4-20 degrees. In this way, when the drill rig drills holes, the coal powder and particles can be timely and automatically come out with the rotation of the drill rod under the inclination state. It is arranged in the manner of the air intake tunnel 3 at the bottom and the return air tunnel 4 at the top; when mining strips, construction is carried out from bottom to top, that is, the mining direction from the air intake tunnel 3 to the return air tunnel 4 is arranged into an upward mining strip mining working face, that is, mining in the direction indicated by the mining direction 5; the length of the strip working face is determined according to 50-80m, and the width is determined according to 4-15m according to the conditions of the top and bottom plates. The mining angle 7 between the mining strip and the air intake tunnel 3 is arranged at an angle between 110 and 140 degrees, mainly to ensure that the mining equipment has enough turning radius to smoothly enter the mining strip working face. Coal transportation equipment is installed in the uphill coal transportation tunnel and the air intake tunnel in the mining area to transport coal out in the coal transportation direction. The diameter of the ventilation hole is 0.4-1m, and the length of the drill rod and the length of the ventilation pipeline are consistent, both 3-6m.

[0032] A coal mining method using a drilling type full-wind pressure ventilation strip type coal mining device, comprising the following steps:

[0033] 1) The mining area completes the strip 12 in an upward mining manner according to the inclination of the coal seam, installs a lower air door and an adjustable air window 9 at the lower end of the coal pillar 17, and installs an upper air door and an adjustable air window 10 at the upper end of the coal pillar 17; to ensure normal ventilation from the air inlet lane 3 to the lower air door and the adjustable air window 9, through the goaf of the strip 12 to the upper air door and the adjustable air window 10, through the return air lane 4 to the return air lane connecting lane 2, forming full wind pressure ventilation;

[0034] 2) During the construction of mining strip 2 13, the drilling rig is installed at the position of the air inlet lane 3 facing the mining strip 2 13 and the ventilation hole 11 is started. The drilling rig drills the ventilation hole 11 in the upward direction along the working surface of strip 2 13 until the entire strip 2 13 is penetrated;

[0035] 3) When the coal seam is hard and not prone to collapse, after the ventilation hole 11 of the strip 2 13 is penetrated and the drill rod is ready to be withdrawn, a multi-section short pipe with a diameter of 0.4-1m and a length of 3-6m is prepared at the position of the return air lane 4 corresponding to the mining strip 2 13; as the drill rod is withdrawn, the short pipe is installed in the direction of the drill rod withdrawal, and the diameter of the short pipe is connected by a thread. When the drill rod is completely withdrawn, the ventilation pipeline has been fully installed and laid in the entire borehole to form the ventilation hole 11;

[0036] 4) When the coal seam has a low hardness and is prone to collapse, the strip 2 13 is drilled from bottom to top through the drilling rig to drill the ventilation hole 11, and the short pipe is set on the outside of the drill rod, and is extended into the borehole along the direction of the drill rod. The drill rod is connected to increase the length. After drilling a section of the drill rod, the short pipe of the same length is installed at the same time. The ventilation pipeline has been fully installed and laid in the entire borehole to form the ventilation hole 11;

[0037] 5) At the same time, the lower air door and the regulating air window 9, the upper air door and the regulating air window 10 are closed, and the fresh air flows along the air inlet lane 3, through the ventilation pipe in the mining strip 2 13, and then through the return air lane 4, and then enters the return air lane connecting lane 2, thereby forming full wind pressure ventilation. At this time, in order to reduce the cross-wind of the goaf of strip 12 and the pressure of the roof after mining, the goaf of strip 12 can be filled with paste or high water material;

[0038] 6) At the position of the air inlet lane 3 corresponding to the mining strip 2 13, mining equipment is used to implement coal mining operations. As mining progresses, all the coal around the ventilation pipeline is mined. Every time the pipeline connection is mined, the ventilation pipeline is dismantled and removed, and then coal mining continues. This is repeated until the entire strip 2 13 is mined. Full wind pressure ventilation is always used during the mining of the entire strip 2 13;

[0039] 7) After strip 2 13 is mined, lower air doors and regulating air windows 9, upper air doors and regulating air windows 10 are set at the upper and lower ends of coal pillar 2 18, which are the same as those at the upper and lower ends of coal pillar 1 17, so that the whole working face maintains normal full-pressure ventilation;

[0040] 8) Install the drilling rig at the position of the air inlet tunnel 3 facing the mining strip three 14 and start drilling the ventilating hole 11, repeat steps 2) to 7), and mine the strip three 14. Repeat this process to complete the strip mining of strip four 15, strip five 16 and even the entire working face.

[0041] A drilling type full wind pressure ventilation strip coal mining device and a coal mining method mainly arrange the working face according to the strip-type branch tunnel in the whole coal mining section. After the working face is formed, no local fan is needed for ventilation during the mining process, but effective full wind pressure ventilation is achieved by the ventilation system of the whole mine; there is no ventilation failure caused by the use of local ventilation when both the dual power supply and the dual fan cannot be turned on for some reason.

[0042] The present invention is not limited to the above-mentioned implementation modes, and anyone should be aware of the structural changes made under the enlightenment of the present invention, and all those having the same or similar technical solutions as the present invention fall within the protection scope of the present invention.

[0043] The techniques, shapes, and structural parts not described in detail in the present invention are all well-known techniques.

Claims

1. A drilling type full wind pressure ventilation strip type coal mining device, characterized in that: It includes a coal mining area and a roadway, wherein the coal mining area is provided with a plurality of coal seam strips, and a plurality of coal seam coal pillars distributed in the interlayers of the coal seam strips, the coal seam strips are provided with but not limited to strip one, strip two, strip three, strip four, and strip five, and the coal pillars of the coal seam are sandwiched between strip one, strip two, strip three, strip four, and strip five with but not limited to coal pillar one, coal pillar two, coal pillar three, and coal pillar four, an air intake roadway of the roadway is provided at the lower part of the coal mining area, a return air roadway is provided at the upper part of the coal mining area, one end of the return air roadway is connected to the return air roadway connecting roadway, a mining area uphill coal transportation roadway with the coal transportation direction upward is provided outside one side of the coal mining area, the mining area uphill coal transportation roadway is connected to the air intake roadway and is staggered with the return air roadway; A ventilation hole is drilled in the strip of the coal seam to connect the air inlet lane and the return air lane up and down. An upper air door and an adjustable air window are arranged in the upper return air lane of the coal pillar close to one side of the strip with the ventilation hole, and a lower air door and an adjustable air window are arranged in the lower air inlet lane of the coal pillar to control the air flow up and down from the ventilation hole. The coal mining method of the drilled full-wind pressure ventilation strip type coal mining device comprises the following steps: 1) The mining area completes strip one in an upward mining manner according to the inclination of the coal seam, installs a lower air door and an adjustable air window at the lower end of the coal pillar one, and installs an upper air door and an adjustable air window at the upper end of the coal pillar one; normal ventilation is from the air inlet lane to the lower air door and the adjustable air window, through the goaf of strip one to the upper air door and the adjustable air window, through the return air lane to the return air lane connecting lane, forming full air pressure ventilation; 2) During the construction of mining strip 2, the drill is installed at the position of the air inlet tunnel facing the mining strip 2 and ventilation holes are drilled. The drill is drilled upward along the working surface of strip 2 until the entire strip 2 is penetrated; 3) When the coal seam is hard and not prone to collapse, after the ventilation hole of strip 2 is penetrated and the drill rod is ready to be withdrawn, the short pipe is installed in the direction of the drill rod withdrawal as the drill rod is withdrawn. When the drill rod is completely withdrawn, the ventilation pipeline has been installed and laid in the entire borehole to form a ventilation hole; 4) When the coal seam has a low hardness and is prone to collapse, the second strip is drilled from bottom to top through the drilling rig to drill a ventilation hole while the short pipe is placed on the outside of the drill rod and extended into the borehole along the direction of the drill rod. The drill rod is connected to increase the length. After drilling a section of the drill rod, the short pipe of the same length is installed at the same time. The ventilation pipeline has been fully installed and laid in the entire borehole to form a ventilation hole; 5) At the same time, close the lower air door and the regulating air window, the upper air door and the regulating air window, and the fresh air flows along the air inlet lane, through the ventilation pipe in the second mining strip, and then through the return air lane, and then enters the return air lane connecting lane, thus forming full wind pressure ventilation; 6) At the position of the air inlet roadway corresponding to the mining strip 2, mining equipment is used to carry out coal mining operations. As mining progresses, all the coal around the ventilation pipeline is mined. Every time the pipeline connection is mined, the ventilation pipeline is removed, and then coal mining continues. This is repeated until the entire strip 2 is mined. Full air pressure ventilation is always used during the mining of the entire strip 2; 7) After strip 2 is mined, lower air doors and regulating air windows, upper air doors and regulating air windows are set at the upper and lower ends of coal pillar 2, which are the same as those at the upper and lower ends of coal pillar 1, so that the entire working face retains normal full-pressure ventilation; 8) Install the drill rig at the position of the air inlet tunnel facing the mining strip three and start drilling ventilation holes. Repeat steps 2) to 7) to mine strip three. Repeat this process to complete strip four, strip five, and finally the strip mining of the entire working face.

2. The drilling type full wind pressure ventilation strip type coal mining device according to claim 1 is characterized in that: The coal mining area is mined in an overhand mining manner according to the inclination of the coal seam. The inclination of the coal seam is an overhand mining inclination, and the overhand mining inclination adopts a range of 4-20 degrees.

3. The drilling type full wind pressure ventilation strip type coal mining device according to claim 2 is characterized in that: The mining direction of the upward mining method is from the air inlet tunnel to the return air tunnel.

4. The drilling type full wind pressure ventilation strip type coal mining device according to claim 1 is characterized in that: The mining length of the coal seam strip from bottom to top is 50-80m, and the mining width of the coal seam strip is 4-15m.

5. The drilling type full wind pressure ventilation strip type coal mining device according to claim 1 is characterized in that: The mining angle between the coal seam strip and the air intake tunnel is 110-140 degrees.

6. The drilling type full wind pressure ventilation strip type coal mining device according to claim 1 is characterized in that: Coal transportation equipment is installed in the uphill coal transportation tunnel and the air intake tunnel in the mining area to transport coal in the direction of coal transportation.

7. The drilling type full wind pressure ventilation strip type coal mining device according to claim 1 is characterized in that: The diameter of the ventilation eye is 0.4-1m.

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