Mining main draw shaft blockage dredging construction device

Abstract

The utility model relates to the technical field of mine blasting, in particular to a mining main draw shaft blockage dredging construction device which comprises a supporting assembly and a blasting assembly detachably connected to the top end of the supporting assembly, and the supporting assembly comprises a first steel pipe, a second steel pipe located in a main draw shaft and a nylon rope penetrating through an inner cavity of the first steel pipe and an inner cavity of the second steel pipe. One end of the nylon rope is fixedly connected with the first steel pipe, the other end of the nylon rope freely extends out of the second steel pipe, the first steel pipe is connected with the second steel pipe end to end through a universal joint, and the second steel pipe enters the second steel pipe through a contact drill hole in the chute wall. The blasting assembly can be accurately placed below a blocked ore body through manual operation only by drilling a small hole in the draw shaft wall, the damage degree of accurate blasting and drilling operation to the draw shaft wall is small, secondary potential safety hazards such as collapse and impact are avoided, damage to a shaft structure is effectively reduced, the service life of a main draw shaft is prolonged, and the working efficiency is improved. And the blasting operation is simple and easy to operate.

Description

Technical Field

[0001] This utility model relates to the field of mining blasting technology, and in particular to a construction device for clearing blockages in a mine main chute. Background Technology

[0002] In deep well mining operations, main ore passes often experience blockages due to factors such as high ore moisture content, uneven blockage size, and structural defects in the wellbore, resulting in complex blockage patterns such as arching and agglomeration. Traditional main ore pass unblocking techniques mainly rely on three methods: manual tamping, blasting, and high-pressure water jetting. Among these, blasting involves dropping explosive charges at the wellhead. While this method can handle blockages at greater depths, it suffers from drawbacks such as uncontrollable detonation locations, low energy utilization in rock breaking, and a high risk of secondary damage to the wellbore or ore splashing.

[0003] Chinese utility model patent CN 219531837 U discloses a blasting device for clearing blockages in a chute, comprising a lifting assembly and a support rod. The support rod is disposed inside the chute, and the lifting assembly is disposed within a connecting passage of the chute. The lifting assembly includes a winch, a lifting bracket, and a wire rope. One end of the wire rope is connected to the winch, and the other end passes through the lifting bracket and is connected to the support rod. A fixing plate is provided at the top of the support rod, and a placement groove is formed above the fixing plate, in which an explosive charge is placed. A winding reel and a traction device are provided within the connecting passage of the chute. The above-disclosed scheme involves a winding wheel and a limiting ring, with a traction rope wound on the winding wheel. One end of the traction rope is connected to the winding wheel, and the other end passes through the limiting ring and the traction wheel to be fixedly connected to the support rod. The above-disclosed scheme allows the explosive charge fixed at the top of the support rod to be lifted to the target position where the blockage is located in the chute for targeted detonation. However, the above-disclosed scheme for lifting the explosive charge using a winding wheel, traction wheel, and limiting ring has a complex structure. In order to place the explosive, the chute wall between the chute and the chute connecting passage needs to be extensively excavated, which can easily lead to safety hazards such as collapse and impact during operation. Utility Model Content

[0004] Technical objective: In order to overcome the shortcomings of the existing technology, this utility model provides a construction device for clearing blockages in mine main chute.

[0005] Technical Solution: To achieve the above objectives, this utility model discloses a mine main chute blockage and unblocking construction device, including a support component and a blasting component detachably connected to its top. The support component includes a first steel pipe, a second steel pipe located inside the main chute, and a nylon rope penetrating the inner cavities of the first and second steel pipes. One end of the nylon rope is fixedly connected to the first steel pipe, and the other end extends freely to the outside of the second steel pipe. The first and second steel pipes are connected end to end by a universal joint, and the second steel pipe enters the chute through a connecting borehole on the chute wall.

[0006] Preferably, the blasting component is located at the top of the first steel pipe, and a probe is also provided between the first steel pipe and the blasting component.

[0007] Preferably, the blasting assembly includes a sleeve, the head of the sleeve is sealed with modified epoxy resin, the tail of the sleeve is connected to a sealing cover plate, the sealing cover plate is provided with a first thread that mates with the second thread at the end of the first steel pipe, and the sleeve contains a tubular emulsion explosive.

[0008] Preferably, the tubular emulsion explosive is provided with a conical shaped cap at its upper end.

[0009] Preferably, the connecting borehole is located on the wall of the connecting roadway section of the chute, and the diameter of the connecting borehole is φ32~45mm.

[0010] Preferably, the outer diameter of the sleeve is 5mm smaller than the diameter of the connecting borehole.

[0011] Preferably, the first steel pipe and the second steel pipe are both made of stainless steel, and the universal joint includes a protective plate and a cross shaft rotatably connected to both ends of the protective plate. The two sets of cross shafts are also rotatably connected to the ends of the first steel pipe and the second steel pipe, respectively.

[0012] The beneficial effects of this utility model are:

[0013] 1. When using this device, only a small hole needs to be drilled in the ore pass wall to accurately place the blasting components under the blocked ore body through manual operation, enabling precise blasting. The drilling operation causes minimal damage to the ore pass wall, avoiding secondary safety hazards such as collapse and impact, effectively reducing damage to the shaft structure, extending the service life of the main ore pass, and the blasting operation is simple and easy to operate.

[0014] 2. The modified epoxy resin adhesive allows the blasting components to be adhered to the bottom of the blocked ore body. After the blasting components are fixed in position, by repeatedly pulling the second steel pipe, the universal joint drives the first steel pipe to rotate, so that the threads between the first steel pipe and the blasting components are loosened and disengaged, so that the support components can be smoothly withdrawn and reused.

[0015] 3. The probe provides real-time feedback on the position of the blasting component, which helps to adjust the angle of the first steel pipe to ensure accurate placement of the blasting component and significantly improves the success rate of the operation. Attached Figure Description

[0016] Figure 1 This is the main view of the application scenario of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the explosive component of this utility model;

[0019] Figure 4 Appendix to this utility model Figure 2 Enlarged view of area A in the middle;

[0020] Figure 5 This is a top view of the application scenario of this utility model.

[0021] In the diagram, 1. Ore blockage; 2. Blasting assembly; 201. Modified epoxy resin adhesive; 202. Conical shaped charge cap; 203. Tubular emulsion explosive; 204. Sleeve; 205. Sealing cover plate; 206. Clamp; 207. First thread; 3. Support assembly; 301. Second thread; 302. Probe; 303. Nylon rope; 304. First steel pipe; 305. Universal joint; 306. Second steel pipe; 307. Cross shaft; 308. Protective plate; 4. Connecting borehole; 5. Shaft wall; 6. Main ore pass; 7. Ore discharge gate; 8. Transport roadway; 9. Section roadway; 10. Ore pass connecting roadway; 11. Personnel shaft; 12. Ladder platform; 13. Personnel ladder; 14. Personnel shaft connecting roadway. Detailed Implementation

[0022] The following is in conjunction with the appendix Figure 1 To be continued Figure 5 The principles and features of this utility model are described, and the examples given are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0023] A device for clearing blockages in mine main chute, such as Figures 1-5 As shown, the system includes a support assembly 3 and a detachable blasting assembly 2 connected to its top. Further, the support assembly 3 includes a first steel pipe 304 and a second steel pipe 306 located within the main chute 6. Both the first and second steel pipes 304 and 306 are made of stainless steel; to reduce costs, 304 stainless steel is preferred in this embodiment. The blasting assembly 2 is located at the top of the first steel pipe 304. The first and second steel pipes 304 and 306 are connected end-to-end by a universal joint 305. The universal joint 305 includes a protective plate 308 and cross shafts 307 rotatably connected to both ends of the protective plate 308. The two sets of cross shafts 307 are also rotatably connected to the ends of the first and second steel pipes 304 and 306, respectively. The structural principle of the universal joint 305 is well-known to those skilled in the art and will not be described in detail here.

[0024] The second steel pipe 306 can enter the main chute 6 through the connecting borehole 4 on the chute wall 5. To minimize damage to the main chute 6 on site and avoid secondary safety hazards, the connecting borehole 4 has a diameter of φ32~45mm and can be drilled directly using a pneumatic drill. For ease of construction, the connecting borehole 4 is located on the chute wall 5 of section 10 of the chute connecting tunnel.

[0025] To facilitate adjustment of the blasting position of the blasting component 2 at the top of the first steel pipe 304, a nylon rope 303 is threaded through the inner cavities of the first steel pipe 304 and the second steel pipe 306. One end of the nylon rope 303 is fixed to the first steel pipe 304, and the other end extends freely to the outside of the second steel pipe 306. By pulling the free end of the nylon rope 303, the construction personnel can tighten the nylon rope 303, causing the first steel pipe 304 to swing to the right to adjust the position of the blasting component 2. By gradually loosening the nylon rope 303, the first steel pipe 304 can swing to the left. To enable real-time monitoring of the specific position of the blasting component 2 below the blocked ore body 1 and to precisely tighten or loosen the nylon rope 303 to ensure accurate placement of the blasting component 2 (ideally at the center of the blocked ore body 1), a probe 302 is also installed between the first steel pipe 304 and the blasting component 2.

[0026] Furthermore, the blasting assembly 2 includes a sleeve 204, the head of which is sealed with modified epoxy resin 201, and the tail of which is connected to a sealing cover plate 205. The sealing cover plate 205 has a first thread 207 that mates with the second thread 301 at the end of the first steel pipe 304. The sleeve 204 contains a tubular emulsion explosive 203. The upper end of the tubular emulsion explosive 203 is provided with a conical shaped charge cap 202. In order to pass smoothly through the connecting borehole 4, the outer diameter of the sleeve 204 is 5mm smaller than the diameter of the connecting borehole 4.

[0027] During construction, when a blockage ore body 1 forms within the main ore pass 6, the height of the blockage ore body 1 is determined using a goaf detection or visualization system. Utilizing existing mine transport roadways 8 or segment roadways 9, a manhole 11 and a connecting roadway 14 are constructed parallel to the main ore pass 6, 5 meters horizontally above the existing structure and from the ore discharge gate 7. The manhole 11 reaches near the lower surface of the blockage ore body 1. Cross-section widening is performed 0.5m to 2m below the height of the blockage ore body 1. The specific height of the manhole 11 from the blockage ore body 1 is determined by the arrangement of the ladder platform 12 within the manhole 11. The manhole 11 is then extended to the ore pass connecting roadway 10 with a cross-section of 1.5m × 2.0m, extending to the ore pass wall 5. Holes with dimensions of φ32-45mm are drilled into the ore pass wall 5 until they penetrate the wall, serving as connecting boreholes 4. A tubular emulsion explosive 203 is loaded into a sleeve 204. A conical shaped charge cap 202 is attached to the upper end of the tubular emulsion explosive 203. The head of the sleeve 204 is filled with modified epoxy resin 201. The tail of the sleeve 204 is fixed with a sealing cover plate 205 containing a sealing ring by a clamp 206. The loaded explosive assembly 2 is then connected to the second thread 301 at the end of the first steel pipe 304 by rotation. The support assembly 3, connected to the blasting component 2, is inserted into the main ore pass 6 through the connecting borehole 4. Real-time feedback is obtained via the probe 302. By pulling the nylon rope 303, the position of the first steel pipe 304 is adjusted in a timely manner, sending the blasting component 2 to the lower surface of the blocked ore body 1. After the blasting component 2 adheres to the blocked ore body 1, the second steel pipe 306 is repeatedly pulled, causing the universal joint 305 to rotate the first steel pipe 304, loosening and disengaging the threads between the first steel pipe 304 and the blasting component 2. This disconnects the support assembly 3 from the blasting component 2, removes the support assembly 3, seals the connecting borehole 4, evacuates personnel, and detonates the blasting component 2. In the application of this device, only a small hole needs to be drilled in the ore pass wall 5 to allow for precise placement of the blasting component 2 below the blocked ore body 1 via manual operation, enabling accurate blasting. The drilling operation causes minimal damage to the ore pass wall 5, avoiding secondary safety hazards such as collapse and impact, effectively reducing damage to the shaft structure, extending the service life of the main ore pass 6, and the blasting operation is simple and easy to operate.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for clearing blockages in a mine main chute, characterized in that: The system includes a support assembly (3) and a blasting assembly (2) detachably connected to its top. The support assembly (3) includes a first steel pipe (304), a second steel pipe (306) located inside the main chute (6), and a nylon rope (303) that passes through the inner cavities of the first steel pipe (304) and the second steel pipe (306). One end of the nylon rope (303) is fixed to the first steel pipe (304), and the other end extends freely to the outside of the second steel pipe (306). The first steel pipe (304) and the second steel pipe (306) are connected end to end by a universal joint (305). The second steel pipe (306) enters the main chute (6) through a connecting borehole (4) on the chute wall (5).

2. The mine main chute blockage and unblocking construction device according to claim 1, characterized in that: The blasting component (2) is located at the top of the first steel pipe (304), and a probe (302) is also provided between the first steel pipe (304) and the blasting component (2).

3. The mine main chute blockage clearing construction device according to claim 1, characterized in that: The blasting assembly (2) includes a sleeve (204), the head of which is sealed with modified epoxy resin adhesive (201), and the tail of which is connected to a sealing cover plate (205). The sealing cover plate (205) is provided with a first thread (207) that mates with the second thread (301) at the end of the first steel pipe (304). The sleeve (204) contains a tubular emulsion explosive (203).

4. The mine main chute blockage and unblocking construction device according to claim 3, characterized in that: The tubular emulsion explosive (203) is provided with a conical shaped cap (202) at the upper end.

5. The mine main chute blockage and unblocking construction device according to claim 1, characterized in that: The connecting borehole (4) is located on the chute wall (5) of the chute connecting tunnel (10) section, and the diameter of the connecting borehole (4) is φ32~45mm.

6. The mine main chute blockage and unblocking construction device according to claim 5, characterized in that: The outer diameter of the sleeve (204) is 5 mm smaller than the diameter of the connecting borehole (4).

7. The mine main chute blockage and unblocking construction device according to claim 1, characterized in that: The first steel pipe (304) and the second steel pipe (306) are both made of stainless steel. The universal joint (305) includes a guard plate (308) and a cross shaft (307) rotatably connected to both ends of the guard plate (308). The two sets of cross shafts (307) are also rotatably connected to the ends of the first steel pipe (304) and the second steel pipe (306), respectively.

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