A coal mine underground deep hole blasting drainage, charging and plugging device and method

Abstract

The application discloses a kind of coal mine underground deep hole blasting drainage, charging, plugging device and method, device includes compressed air system, charging system and plugging component;Compressed air system includes compressor, air pipe and compressed air valve;Charging system includes charging box, air supply pipe and medicine pipe, charging box is connected with medicine box air inlet pipe and medicine box air outlet pipe, medicine box air inlet pipe is equipped with medicine box air inlet valve, and medicine box air outlet pipe is equipped with medicine box air outlet valve, and the top of charging box is equipped with sealing cover, and the bottom is equipped with medicine outlet pipe, and the medicine outlet pipe is equipped with medicine valve, and the air outlet end of air pipe is connected with medicine box air inlet pipe and air supply pipe respectively, and the inlet end of air supply pipe is equipped with air supply pipe air inlet valve, and air supply pipe is equipped with a branch and is connected with medicine outlet pipe, and plugging component is used to plugging blast hole orifice when draining.The application improves the drainage, charging, plugging rate of deep hole blasting, improves the hard rock speed of coal winning machine and fully mechanized heading machine, stabilizes coal production, relieves mining succession tension, and guarantees the high yield and high efficiency production of coal mine.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of underground coal mine blasting, in particular to a coal mine underground deep hole blasting drainage, charging and plugging device and method. BACKGROUND

[0002] Coal has experienced a long geological tectonic movement in the ore-forming process, resulting in many geological structures of different sizes in the coalfield. The geological structures that have a greater impact on fully mechanized mining include faults, collapse columns, intrusive rocks, etc., and their mechanical parameters such as strength and hardness are much greater than those of coal seams. When the geological structure is cut by the shearer, the cutting pick is severely consumed, and the advancing speed is greatly reduced, which seriously affects the continuity of production and the yield. To solve the problem of shearer advancing difficulty, the working face is currently moved, detoured, and assisted by shallow hole blasting. Moving and detouring will cause production to stop or greatly reduce, and are easy to cause damage to fully mechanized mining equipment. Shallow hole blasting generally uses 1.5-3.0m drilling for pre-splitting blasting, which weakens the medium range, has more blasting cycles, and has a long auxiliary operation, resulting in low efficiency of coal mining, and the negative risks and impacts caused by the large number of blasting times also greatly increase.

[0003] Therefore, in order to improve the working efficiency of the working face passing through the geological structure, control the production cost, and reduce the number of blasting, it is very necessary to use near-horizontal deep hole blasting technology to fully pre-split the geological structure belt on the shearer cutting track, reduce the shearer cutting pick consumption, improve the shearer cutting speed, stabilize the coal production, and ensure the production safety.

[0004] On the other hand, coal mining in China is mainly underground mining, and the tunneling speed directly affects the mining speed of the coal mine. When the tunneling working face passes through hard rock, problems such as slow cutting speed of the fully mechanized tunneling machine, cutting head damage, high maintenance cost, long maintenance time, etc. often occur, which seriously affects the tunneling footage. Similarly, using near-horizontal deep hole blasting technology to pre-split the hard rock on the cutting track of the fully mechanized tunneling machine can reduce the cutting pick consumption of the fully mechanized tunneling machine, improve the cutting speed of the fully mechanized tunneling machine, alleviate the tight mining and tunneling connection, and ensure the high-yield and high-efficiency production of the coal mine.

[0005] However, the deep hole blasting of the mining and tunneling face in the coal mine has the characteristics of deep hole depth, difficult drainage, large charge quantity and poor sealing. The following problems are prone to occur during charging: (1) water in the hole, which causes charging difficulty, affects the performance of explosives and the stability of the blasting network; (2) discontinuous charging, which is difficult to propagate; (3) long hole sealing length, large workload and poor sealing. At present, in the existing technology: Chinese patent (CN112696999A) discloses a charging device and method for deep hole blasting, which specifically pushes a plurality of charging pipes, filling pipes, pulling ropes, rope cards, and plug plugs to the set position by using a cannon stick. The charging pipe is filled with emulsion explosive, and the filling pipe is filled with filling material. The device has a complex structure, many operation steps, and consumes time and effort. Chinese patent (CN108106506A) discloses a deep hole blasting intrinsically safe type rapid charging device, which specifically uses a conical guide head at the front end of the device and a PVC pipe to send emulsion explosive to the designated position. During the charging process, the length of the PVC pipe is 2m, and when the hole is not straight or there are residual coal and rock debris in the hole, the PVC pipe will be stuck in the hole. Chinese patent (CN110196003B) provides a deep hole blasting rapid charging device and method, which specifically comprises a plurality of charging units connected end to end, the charging unit comprising a charging pipe, a detonating cord and an explosive roll, and a closing plug is arranged at the head and tail of the charging device respectively. Then manually push it into the drill hole quickly, and then use the through hole device to push the charging device to the predetermined position in the drill hole again. When pushing the charging device, it is easy to get stuck in the hole, and the charging length of the deep hole blasting is very long, so it is difficult to push the charging device to the predetermined position by the through hole device.

[0006] In view of this, we propose a coal mine underground near-horizontal deep hole blasting drainage, charging and sealing device and method to solve the technical problems existing in the above-mentioned prior art. SUMMARY

[0007] The purpose of the present application is to provide a coal mine deep hole blasting drainage, charging and sealing device and method to solve the problems existing in the above-mentioned prior art, improve the drainage, charging and sealing rate of deep hole blasting, improve the speed of coal mining machine and fully mechanized heading machine through hard rock, stabilize coal production, alleviate the tension of mining and excavation connection, and ensure the high yield and efficient production of coal mine.

[0008] To achieve the above-mentioned purpose, the present application provides the following solutions:

[0009] The present application provides a coal mine deep hole blasting drainage, charging and sealing device, which comprises a compressed air system, a charging system and a sealing component;

[0010] The compressed air system comprises a compressed air fan, an air pipe and a compressed air valve, the air inlet end of the air pipe is connected with the air outlet of the compressed air fan, and the compressed air valve is arranged at the air inlet end of the air pipe.

[0011] The charging system comprises a charging box, an air feeding pipe and a medicine feeding pipe, the charging box is connected with a medicine box air inlet pipe and a medicine box air outlet pipe, the medicine box air inlet pipe is provided with a medicine box air inlet valve, the medicine box air outlet pipe is provided with a medicine box air outlet valve, the top of the charging box is provided with a sealable sealing cover, the bottom of the charging box is provided with a medicine outlet pipe, the medicine outlet pipe is provided with a medicine outlet valve, the air outlet end of the air pipe is divided into two paths, one path is connected with the inlet end of the medicine box air inlet pipe, and the other path is connected with the inlet end of the air feeding pipe, the air pipe is detachably connected with the medicine box air inlet pipe and the air feeding pipe, the inlet end of the air feeding pipe is provided with an air feeding pipe air inlet valve, one branch of the air feeding pipe is connected with the medicine outlet pipe, the connection between the medicine outlet pipe and the air feeding pipe is located on the downstream side of the air feeding pipe air inlet valve, and the outlet end of the air feeding pipe is detachably connected with one end of the medicine feeding pipe.

[0012] The plugging component is used for plugging the blast hole orifice when draining water.

[0013] In an embodiment, the inlet ends of the medicine box air inlet pipe and the air feeding pipe are merged into one path and connected with the air pipe through a first joint.

[0014] In an embodiment, the outlet end of the air feeding pipe is connected with the medicine feeding pipe through a second joint.

[0015] In an embodiment, the plugging component comprises a hollow soft rubber plug.

[0016] The application also provides a coal mine underground deep hole blasting, charging and plugging method based on the above-mentioned coal mine underground deep hole blasting, charging and plugging device, which comprises the following steps:

[0017] S1: according to the properties of the coal mine underground roof, floor and working face to be blasted, complete the design of the underground deep hole blasting, and complete the drilling work of the working face according to the design requirements, and prepare the explosives and hole sealing materials;

[0018] S2: one end of the medicine delivery tube is inserted into the bottom of the blast hole, and the other end is set as a free end, the air outlet end of the air pipe is inserted into the blast hole, the blast hole is blocked by the blocking part, the air compressor and the air valve are opened, the water in the blast hole is blown to the bottom of the blast hole and then discharged from the medicine delivery tube by air pressure, then the air compressor and the air valve are closed; the free end of the medicine delivery tube is connected with the outlet end of the air pipe, the blocking part of the blast hole is removed, the air outlet end of the air pipe is connected with the air inlet pipe of the medicine box and the inlet end of the air pipe, the air compressor and the air valve are opened, the air outlet valve of the medicine box is closed, the air inlet valve of the medicine box, the medicine outlet valve and the air inlet valve of the air pipe are opened, the water at the bottom of the blast hole is blown out along the blast hole by air pressure, and then the air compressor and the air valve are closed;

[0019] S3: repeat step S2 to complete the drainage work of each blast hole one by one;

[0020] S4: after the coal mine permissible explosive is sieved, it is poured into the charging box;

[0021] S5: one end of the detonating cord is inserted into the medicine delivery tube, and the detonating cord is sent to the bottom of the hole by the medicine delivery tube; then the medicine delivery tube is moved out of the blast hole one by one, and each time the medicine delivery tube is moved out, the blast hole section corresponding to the distance moved out by the medicine delivery tube is filled with explosive by the air pressure system and the charging system, until the charging work of the blast hole is completed;

[0022] S6: repeat step S5 to complete the charging work of each blast hole one by one;

[0023] S7: after the hole sealing material is sieved, it is poured into the charging box;

[0024] S8: the medicine delivery tube is inserted into the blast hole until it contacts the explosive, and then the medicine delivery tube is moved out of the blast hole one by one, and each time the medicine delivery tube is moved out, the blast hole section corresponding to the distance moved out by the medicine delivery tube is filled with hole sealing material by the air pressure system and the charging system, until the sealing work of the blast hole is completed;

[0025] S9: repeat step S8 to complete the sealing work of each blast hole one by one.

[0026] In an embodiment, in step S7, the hole sealing material is one, two or three of loess, sand and cement.

[0027] In an embodiment, in step S5, each time the explosive is filled, the medicine delivery tube is pulled out 3m from the bottom of the hole, the sealing cover, the air supply pipe inlet valve, the medicine outlet valve and the medicine tank outlet valve are closed, the air compressor, the air compressor valve and the medicine tank inlet valve are opened, after the sealing cover is tightly closed under the action of air pressure, the air supply pipe inlet valve is opened, after the air pressure of the medicine delivery tube is stable, the medicine outlet valve is opened, the explosive is filled into the blast hole until the 3m blast hole section is completely filled with explosive, and then the medicine outlet valve is closed.

[0028] In an embodiment, in step S8, each time the hole sealing material is filled, the medicine delivery tube is pulled out 1.5m from the bottom of the hole, the sealing cover, the air supply pipe inlet valve, the medicine outlet valve and the medicine tank outlet valve are closed, the air compressor, the air compressor valve and the medicine tank inlet valve are opened, after the sealing cover is tightly closed under the action of air pressure, the air supply pipe inlet valve is opened, after the air pressure of the medicine delivery tube is stable, the medicine outlet valve is opened, the hole sealing material is filled into the blast hole until the 1.5m blast hole section is completely filled with hole sealing material, and then the medicine outlet valve is closed.

[0029] In an embodiment, in step S5, when the explosive in the medicine tank is used up, the medicine tank inlet valve is closed, the medicine tank outlet valve is opened, and after there is no air pressure in the medicine tank, the screened explosive is poured into the medicine tank.

[0030] In an embodiment, in step S8, when the hole sealing material in the medicine tank is used up, the medicine tank inlet valve is closed, the medicine tank outlet valve is opened, and after there is no air pressure in the medicine tank, the screened hole sealing material is poured into the medicine tank.

[0031] The present application has the following technical effects compared with the prior art:

[0032] The coal mine underground deep hole blasting drainage, charging and plugging device and method provided by the present application uses the compressed air system to cooperate with the charging system and the plugging component to complete the drainage, charging and plugging of the underground deep hole, has good drainage effect and high efficiency, the charging operation is simple, time-saving and labor-saving, the "stuck" phenomenon of the blast hole does not occur compared with other devices, continuous charging and safe sympathetic detonation can be ensured, the plugging speed is fast and the plugging is compact, the deep hole blasting is not easy to punch, the drainage, charging and plugging rate of deep hole blasting is improved, the speed of the coal mining machine and the fully-mechanized coal mining machine passing hard rock is improved, the coal production is stabilized, the tension of mining and excavation connection is relieved, and the high-yield and high-efficiency production of the coal mine is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Fig. 1 This is a schematic diagram illustrating the use of the deep-hole blasting drainage, charging, and sealing device in a coal mine embodiment of the present invention.

[0035] Fig. 2 This is a schematic diagram of the structure of a deep-hole blasting drainage, charging, and sealing device in a coal mine according to an embodiment of the present invention.

[0036] In the diagram: 1-Air compressor, 2-Air duct, 3-Air compressor valve, 4-Packing box, 5-Air supply pipe, 6-Packing pipe, 7-Packing box air inlet pipe, 8-Packing box air outlet pipe, 9-Packing box air inlet valve, 10-Packing box air outlet valve, 11-Sealing cover, 12-Packing pipe, 13-Packing valve, 14-Air supply pipe air inlet valve, 15-Blast hole, 16-First joint, 17-Second joint, 18-Sealing component, 19-Top plate, 20-Bottom plate, 21-Working face, 22-Rock to be blasted, 23-Explosive, 24-Sealing material. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] The purpose of this invention is to provide a device and method for drainage, charging, and sealing in deep-hole blasting in coal mines, so as to solve the problems existing in the prior art, improve the drainage, charging, and sealing rate of deep-hole blasting, increase the speed of coal mining machines and roadheaders through hard rock, stabilize coal production, alleviate the tension of mining and tunneling continuity, and ensure high-yield and high-efficiency production in coal mines.

[0039] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] Example 1

[0041] like Figs. 1-2 As shown, this embodiment provides a deep-hole blasting drainage, charging, and sealing device for coal mines, including a compressed air system, a charging system, and a sealing component 18; the compressed air system can provide stable air energy for blast hole drainage and the charging system;

[0042] The compressed air system includes a compressor 1, a duct 2, and a compressed air valve 3. The air inlet of the duct 2 is connected to the air outlet of the compressor 1, and the compressed air valve 3 is located at the air inlet of the duct 2.

[0043] The drug loading system includes a drug loading box 4, an air supply pipe 5, and a drug delivery pipe 6. The drug loading box 4 is connected to a drug box inlet pipe 7 and a drug box outlet pipe 8. The drug box inlet pipe 7 is equipped with a drug box inlet valve 9, and the drug box outlet pipe 8 is equipped with a drug box outlet valve 10. The top of the drug loading box 4 is equipped with an openable and closable sealing cover 11, and the bottom is equipped with a drug outlet pipe 12. The drug outlet pipe 12 is equipped with a drug outlet valve 13. The outlet end of the air pipe 2 is divided into two paths. One path is connected to the inlet end of the drug box inlet pipe 7, and the other path is connected to the inlet end of the air supply pipe 5. The air pipe 2 can be detachably connected to the drug box inlet pipe 7 and the air supply pipe 5. The inlet end of the air supply pipe 5 is equipped with an air supply pipe inlet valve 14. A branch of the air supply pipe 5 is connected to the drug outlet pipe 12. The connection between the drug outlet pipe 12 and the air supply pipe 5 is located downstream of the air supply pipe inlet valve 14. The outlet end of the air supply pipe 5 can be detachably connected to one end of the drug delivery pipe 6.

[0044] The sealing component 18 is used to seal the opening of the blast hole 15 during drainage. The sealing component 18 includes a hollow soft rubber plug.

[0045] In this embodiment, the inlet ends of the medicine box air inlet pipe 7 and the air supply pipe 5 are connected together and then connected to the air pipe 2 through the first connector 16, which facilitates disassembly and assembly.

[0046] In this embodiment, the outlet end of the air supply pipe 5 is connected to the drug delivery pipe 6 through the second connector 17, which facilitates disassembly and assembly.

[0047] Example 2

[0048] like Figs. 1-2 As shown, this embodiment provides a method for deep-hole blasting drainage, charging, and sealing in coal mines. Based on the aforementioned deep-hole blasting drainage, charging, and sealing device for coal mines, it includes the following steps:

[0049] S1: Based on the properties of the rock 22 to be blasted in the underground roof 19, floor 20 and working face 21 of the coal mine, complete the design of deep hole blasting in the mine, and complete the drilling work of the working face 21 according to the design requirements, and prepare the explosives 23 and sealing materials 24.

[0050] S2: Connect one end of the delivery pipe 6 to the bottom of the borehole 15, and set the other end as a free end. Insert the air outlet end of the air pipe 2 into the borehole 15 (insert it about 2m in). Seal the borehole 15 opening with the sealing component 18. Turn on the air compressor 1 and the air valve 3. Use the air pressure to blow the water in the borehole 15 to the bottom of the hole and then discharge it from the delivery pipe 6. Then turn off the air compressor 1 and the air valve 3. By sealing the borehole 15 opening with the sealing component 18, it is ensured that the air pressure can push the water from the borehole 15 to the bottom of the hole and then discharge it through the delivery pipe 6.

[0051] Next, connect the free end of the delivery pipe 6 to the outlet end of the air supply pipe 5, remove the sealing component 18 from the borehole 15, connect the air outlet end of the air pipe 2 to the air inlet pipe 7 of the medicine box and the inlet end of the air supply pipe 5, turn on the air compressor 1 and the air compressor valve 3, close the air outlet valve 10 of the medicine box, open the air inlet valve 9 of the medicine box, the discharge valve 13 and the air supply pipe inlet valve 14, use the air pressure to blow the water at the bottom of the borehole 15 out along the borehole 15, further drain the water in the borehole 15, and then turn off the air compressor 1 and the air compressor valve 3.

[0052] S3: Repeat step S2 to complete the drainage work of each blast hole 15 one by one;

[0053] S4: After sieving the permitted powdered emulsion explosive 23 for coal mines, pour it into the charging box 4 to prevent the explosive 23 from clumping and blocking the delivery pipe 6 during the charging process. The amount of explosive should not exceed four-fifths of the charging box 4.

[0054] S5: Insert one end of the detonating cord into the delivery pipe 6, and use the delivery pipe 6 to send the detonating cord to the bottom of the hole; then move the delivery pipe 6 outward from the bottom of the borehole 15 one by one. Each time the delivery pipe 6 moves outward, the compressed air system and the charging system are used to fill the borehole section corresponding to the outward movement distance of the delivery pipe 6 with explosives 23, until the charging work of one borehole 15 is completed; specifically, each loading of explosives includes: pulling the delivery pipe 6 outward 3m from the bottom of the hole, closing the sealing cover 11, and opening the air supply pipe. Air valve 14, explosive discharge valve 13 and explosive box air outlet valve 10, air compressor 1, compressed air valve 3 and explosive box air inlet valve 9 are opened. After the sealing cover 11 is completely closed under the action of air pressure, the air supply pipe air inlet valve 14 is opened. After the air pressure of the delivery pipe 6 is stable, the explosive discharge valve 13 is opened. The explosive 23 is discharged from the explosive discharge valve 13 under the action of air pressure. Then, the explosive 23 is loaded into the borehole 15 through the delivery pipe 6 until the 3m borehole section is completely filled with explosive 23. Then the explosive discharge valve 13 is closed.

[0055] S6: Repeat step S5 to complete the charging of each blast hole one by one;

[0056] S7: After sieving the sealing material 24, pour it into the medicine loading box 4;

[0057] S8: Insert the propellant delivery pipe 6 into the borehole 15 until it contacts the explosive 23. Then, gradually move the propellant delivery pipe 6 out of the borehole 15. Each time the propellant delivery pipe 6 moves outward, fill the borehole section corresponding to the outward movement distance of the propellant delivery pipe 6 with sealing material 24 through the compressed air system and the charging system until the sealing work of the borehole 15 is completed. Specifically, each filling of the sealing material 24 includes: pulling the propellant delivery pipe 6 outward from the bottom of the hole by 1.5m, closing the sealing cap 11 and the air inlet valve 1 of the air supply pipe. 4. Open the discharge valve 13 and the air outlet valve 10 of the medicine box, open the air compressor 1, the air compressor valve 3 and the air inlet valve 9 of the medicine box. After the sealing cover 11 is completely closed under the action of air pressure, open the air inlet valve 14 of the air supply pipe. After the air pressure of the delivery pipe 6 is stable, open the discharge valve 13 and fill the blast hole 15 with sealing material 24 until the 1.5m blast hole section is completely filled with sealing material 24. Then close the discharge valve 13. The sealing length is set to 1.5m each time to better ensure the sealing quality.

[0058] S9: Repeat step S8 to complete the sealing work of each blast hole 15 one by one.

[0059] In this embodiment, in step S7, the sealing material 24 is one, two, or three of loess, sand, and cement. It must be sieved before being loaded into the drug delivery box 4 to prevent the sealing material 24 from clumping and clogging the drug delivery pipe 6 during the sealing process.

[0060] In this embodiment, in step S5, after the explosive 23 in the explosive charging box 4 is used up, the air inlet valve 9 of the explosive charging box is closed, and the air outlet valve 10 of the explosive charging box is opened. After there is no air pressure in the explosive charging box 4, the sieved explosive 23 is poured into the explosive charging box 4. In step S8, after the sealing material 24 in the explosive charging box 4 is used up, the air inlet valve 9 of the explosive charging box is closed, and the air outlet valve 10 of the explosive charging box is opened. After there is no air pressure in the explosive charging box 4, the sieved sealing material 24 is poured into the explosive charging box 4.

[0061] When drilling near-horizontal deep holes in coal mines, water often accumulates at the bottom of the borehole due to moisture in the rock strata and during drilling and hole washing. Traditional methods using water pumps and single-pipe blowing cannot completely remove the water, leading to difficulties in charging explosives, explosive failure, and other adverse consequences, seriously affecting the safety of blasting operations and the progress of the project. This invention utilizes a compressed air system in conjunction with a charging system and sealing components to drain deep holes in the mine. The drainage effect is good and efficient, which facilitates subsequent charging work, avoids explosive failure, and ensures the safety of blasting operations and the progress of the project.

[0062] In deep-hole blasting in coal mines, conventional charging devices are complex to operate and take a long time to charge. This invention utilizes a compressed air system in conjunction with a charging system to quickly complete the charging process. It is simple to operate, saves time and effort, and compared to other devices, it does not cause the blast hole to "get stuck," ensuring continuous charging and safe detonation.

[0063] Deep-hole blasting in coal mines typically uses manual methods for sealing, which results in poor sealing quality and is time-consuming. This invention utilizes a compressed air system in conjunction with a charging system to seal the blast holes, achieving fast sealing speed and a tight seal, making it less prone to hole breaching during deep-hole blasting.

[0064] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A device for deep-hole blasting drainage, charging, and sealing in coal mines, characterized in that: Includes compressed air system, explosive loading system and sealing components; The compressed air system includes a compressor, a duct, and a compressed air valve. The air inlet of the duct is connected to the air outlet of the compressor, and the compressed air valve is located at the air inlet of the duct. The drug loading system includes a drug loading box, an air supply pipe, and a drug delivery pipe. The drug loading box is connected to a drug box inlet pipe and a drug box outlet pipe. The drug box inlet pipe is equipped with a drug box inlet valve, and the drug box outlet pipe is equipped with a drug box outlet valve. The top of the drug loading box is equipped with an openable and closable sealing cover, and the bottom is equipped with a drug outlet pipe. The drug outlet pipe is equipped with a drug outlet valve. The outlet end of the air duct is divided into two paths: one path is connected to the inlet end of the drug box inlet pipe, and the other path is connected to the inlet end of the air supply pipe. The air duct is detachably connected to the drug box inlet pipe and the air supply pipe. The inlet end of the air supply pipe is equipped with an air supply pipe inlet valve. A branch of the air supply pipe is connected to the drug outlet pipe. The connection point between the drug outlet pipe and the air supply pipe is located downstream of the air supply pipe inlet valve. The outlet end of the air supply pipe is detachably connected to one end of the drug delivery pipe. The sealing component is used to seal the borehole opening during drainage. After the explosive is loaded, the sealing material is sieved and poured into the charge box. The sealing material is then filled through the compressed air system and the charge system.

2. The deep-hole blasting drainage, charging, and sealing device for coal mines according to claim 1, characterized in that: The inlet ends of the medicine box air inlet pipe and the air supply pipe converge and are connected to the air duct through the first connector.

3. The deep-hole blasting drainage, charging, and sealing device for coal mines according to claim 1, characterized in that: The outlet end of the air supply pipe is connected to the drug delivery pipe via a second connector.

4. The deep-hole blasting drainage, charging, and sealing device for coal mines according to claim 1, characterized in that: The sealing component includes a hollow soft rubber plug.

5. A method for deep-hole blasting drainage, charging, and sealing in coal mines, characterized in that, The coal mine deep-hole blasting drainage, charging, and sealing device according to any one of claims 1 to 4 includes the following steps: S1: Based on the properties of the roof, floor and working face of the coal mine, complete the deep hole blasting design, and complete the drilling work of the working face according to the design requirements, and prepare explosives and sealing materials. S2: Connect one end of the delivery pipe to the bottom of the borehole, and set the other end as a free end. Insert the air outlet end of the air pipe into the borehole opening. Seal the borehole opening with the sealing component. Turn on the air compressor and the air valve. Use air pressure to blow the water in the borehole to the bottom of the borehole and then discharge it from the delivery pipe. Then turn off the air compressor and the air valve. Connect the free end of the delivery pipe to the outlet end of the air supply pipe. Remove the sealing component from the borehole opening. Connect the air outlet end of the air pipe to the inlet end of the medicine box air inlet pipe and the air supply pipe. Turn on the air compressor and the air valve. Close the medicine box air outlet valve. Open the medicine box air inlet valve, the medicine outlet valve, and the air supply pipe air inlet valve. Use air pressure to blow the water at the bottom of the borehole out along the borehole. Then turn off the air compressor and the air valve. S3: Repeat step S2 to complete the drainage work of each blast hole one by one; S4: After sieving the permitted explosives for coal mines, pour them into the explosives loading box; S5: Insert one end of the detonating cord into the delivery tube, and use the delivery tube to send the detonating cord to the bottom of the hole; then move the delivery tube outward from the bottom of the borehole one by one. Each time the delivery tube moves outward, the compressed air system and the charging system fill the borehole section corresponding to the outward movement distance of the delivery tube with explosives until the charging work of the borehole is completed. S6: Repeat step S5 to complete the charging of each blast hole one by one; S7: After sieving the sealing material, pour it into the medicine loading box; S8: Insert the delivery tube into the borehole until it contacts the explosive, and then move the delivery tube out of the borehole one by one. Each time the delivery tube moves outward, the compressed air system and the charging system fill the borehole section corresponding to the outward movement distance of the delivery tube with sealing material until the sealing of the borehole is completed. S9: Repeat step S8 to complete the sealing work of each blast hole one by one.

6. The method for deep-hole blasting drainage, charging, and sealing in coal mines according to claim 5, characterized in that: In step S7, the sealing material is one, two, or three of loess, sand, and cement.

7. The method for deep-hole blasting drainage, charging, and sealing in coal mines according to claim 5, characterized in that: In step S5, each loading of explosives includes: pulling the delivery pipe outward 3m from the bottom of the hole, closing the sealing cap, the air inlet valve of the air supply pipe, the discharge valve, and the air outlet valve of the explosive box, opening the air compressor, the air compressor valve, and the air inlet valve of the explosive box, and after the sealing cap is completely closed under the action of air pressure, opening the air inlet valve of the air supply pipe, and after the air pressure of the delivery pipe is stable, opening the discharge valve, loading explosives into the borehole until the 3m borehole section is completely filled with explosives, and then closing the discharge valve.

8. The method for deep-hole blasting drainage, charging, and sealing in coal mines according to claim 5, characterized in that: In step S8, each filling of the sealing material includes: pulling the delivery pipe outward 1.5m from the bottom of the hole, closing the sealing cap, the air inlet valve of the air supply pipe, the delivery valve, and the air outlet valve of the medicine box, opening the air compressor, the air compressor valve, and the air inlet valve of the medicine box, and after the sealing cap is completely closed under the action of air pressure, opening the air inlet valve of the air supply pipe, and after the air pressure of the delivery pipe is stable, opening the delivery valve, filling the borehole with sealing material until the 1.5m borehole section is completely filled with sealing material, and then closing the delivery valve.

9. The method for deep-hole blasting drainage, charging, and sealing in coal mines according to claim 5, characterized in that: In step S5, after the explosives in the explosives box are used up, the air inlet valve of the explosives box is closed and the air outlet valve of the explosives box is opened. After there is no air pressure in the explosives box, the sieved explosives are poured into the explosives box.

10. The method for deep-hole blasting drainage, charging, and sealing in coal mines according to claim 5, characterized in that: In step S8, after the sealing material in the medicine box is used up, the air inlet valve of the medicine box is closed and the air outlet valve of the medicine box is opened. After there is no air pressure in the medicine box, the sieved sealing material is poured into the medicine box.

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