Control and pumping drainage device for poisonous and harmful gas generated by blasting

Abstract

The utility model belongs to the technical field of mine safety equipment, and particularly discloses a control and pumping drainage device for poisonous and harmful gas generated by blasting, which comprises a drill hole, a gas collector and a pumping drainage main pipe, a hole sealing component is filled with hole sealing cement and loess stemming alternately, and a compressible buffer structure and an adjustable anchoring device are arranged at a hole opening; the gas collector adopts a modular design and is connected with the pumping and discharging system through a multi-channel flow guide pipe; the pumping drainage system is connected with a mine pumping drainage pipeline in a matched mode through a rapid flange plate. According to the device, gas dissipation is restrained through the elastic sealing and directional flow guide technology, and the blasting gas treatment efficiency and the practicability of the device are remarkably improved in combination with the modular pumping and discharging design.

Description

Technical Field

[0001] This utility model relates to the field of mine safety equipment technology, specifically to a device for controlling and extracting toxic and harmful gases generated during blasting. Background Technology

[0002] In the coal mining process, the longwall mining face needs to carry out roof cutting operations, which are often carried out by blasting. This can weaken or break the roof rock in advance, so that the roof can collapse in time during the coal mining process, thereby shortening the pressure step distance of the old roof during the initial mining, reducing the area of ​​the roof hanging in the initial mining, and improving the coal mining efficiency. However, underground blasting operations generate a large amount of toxic and harmful gases, and the treatment of toxic and harmful gases generated by blasting is of paramount importance.

[0003] Chinese patent application publication CN221964834U discloses a gas extraction device, including a support base with a support column mounted on its lower surface. The support column provides support for the support base, and the bottom end of the support column is equipped with fixed casters. It also includes an extraction mechanism and a filter box. This gas extraction device, with its filter box and gas detector, can monitor the gas concentration in a timely manner, facilitating timely reduction of the gas concentration to prevent explosions. The mobile cleaning component can clean the surface of the filter plate, preventing long-term accumulation and blockage, eliminating the need for frequent filter plate replacements. The collection box and spray pipe can further enhance the gas filtration effect, facilitating subsequent gas reuse.

[0004] The aforementioned equipment can extract gases such as methane from mine shafts, but it can only extract harmful gases generated during drilling and blasting after the gases have already diffused within the mine shaft; it cannot prevent the spread of harmful gases. Utility Model Content

[0005] The purpose of this invention is to provide a device for controlling and extracting toxic and harmful gases generated during blasting, so as to solve the problem of harmful gases generated during drilling and blasting.

[0006] To achieve the above objectives, the basic solution provided by this utility model is as follows: a device for controlling and extracting toxic and harmful gases generated by blasting, comprising a borehole, a gas collector, and an extraction main pipe. The borehole is alternately filled with sealing cement and loess mud. A buffer layer is pressed against the borehole opening, and a pressure plate is pressed against the buffer layer. A steel plate is fixedly installed on the pressure plate. Several anchor rods penetrate the pressure plate and the steel plate and are tightened by nuts. The anchor rods are fixedly connected to the tunnel roof. A lifting ring is provided at the top of the gas collector, and a hook is fixedly connected to the tunnel roof. The gas collector is hung on the hook via the lifting ring. A multi-channel guide pipe is welded to the bottom of the gas collector. A steel wire hose is fixedly connected to the guide pipe via a clamp. A steel pipe is fixedly connected to the other end of the steel wire hose via a clamp. A quick-connect flange is welded to the end of the steel pipe. The extraction main pipe is connected to the steel pipe via the quick-connect flange, and the quick-connect flange is provided with a leak-proof sealing ring.

[0007] The principle and beneficial effects of this invention are as follows: Sealing cement prevents gas leakage during blasting and drilling. When filling boreholes with loess mud, it can adaptively expand with the deformation of rock fissures, compensating for the sealing failure problem caused by rock movement in traditional rigid sealing materials. The multi-channel guide pipe of the gas collector disperses the gas flow, avoiding blockage in a single pipe, and the steel wire hose absorbs pipeline vibration, preventing cracking at connections. The structure is simple and allows for quick connection.

[0008] Option 2, a preferred embodiment of the basic option, involves a buffer layer composed of multiple layers of elastic rubber material, with air guide grooves on the surface of the pressure plate. When under pressure, the multiple layers of elastic buffer deform layer by layer, evenly dispersing the gas pressure impact and preventing localized stress concentration that could lead to seal failure. The air guide grooves on the pressure plate direct the gas flow towards the collector, reducing gas stagnation at the orifice.

[0009] Option 3, a preferred option of the basic scheme, involves a gas collector equipped with several guide vanes. These guide vanes divert the gas to different channels, reducing turbulence and lowering local flow velocities, thus preventing gas accumulation due to high-speed flow.

[0010] Option 4, a preferred option of the basic scheme, features a sealing ring made of corrosion-resistant elastic material for the quick-connect flange, and a conical airflow stabilizing chamber at the connection between the steel pipe and the main extraction pipe. This airflow stabilizing chamber reduces gas velocity by increasing the cross-sectional area, balances pressure fluctuations in the extraction system, reduces extraction resistance, improves the operational stability of the extraction system, and prevents equipment overload due to sudden pressure changes.

[0011] Option 5, a preferred option of the basic scheme, involves a wing nut threaded onto the anchor bolt, which is tightly fitted against the tunnel roof. The wing nut limits the anchor bolt's extension length, preventing excessive length from interfering with other equipment. It also allows for fine-tuning of the anchor bolt's position in the vertical direction, adapting to borehole offsets or uneven roof conditions, while facilitating quick disassembly and maintenance. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a device for controlling and extracting toxic and harmful gases generated by blasting according to this utility model;

[0013] Figure 2 This is a front view of a device for controlling and extracting toxic and harmful gases generated during blasting, according to this utility model.

[0014] Figure 3 This utility model relates to a drilling and extraction device for controlling and removing toxic and harmful gases generated during blasting. Figure 2 Sectional view at point A in the middle;

[0015] Figure 4 yes Figure 3 Sectional view at point B;

[0016] Figure 5 yes Figure 3 A magnified view of a section at point C. Detailed Implementation

[0017] The present invention will be further described in detail below through specific embodiments:

[0018] The reference numerals in the accompanying drawings include: 1-Drill hole, 2-Sealing cement, 3-Loess blasting mud, 4-Tunnel roof, 5-Hook, 6-Anchor bolt, 7-Airflow pressure stabilizing chamber, 8-Lifting ring, 9-Buffer layer, 10-Pressure plate, 11-Steel plate, 12-Gas collector, 13-Guide pipe, 14-Guide vane, 15-Clamping clamp, 16-Wire hose, 17-Quick flange, 18-Sealing ring, 19-Exhaust main pipe, 20-Steel pipe, 21-Air duct, 22-Wing nut.

[0019] Example

[0020] like Figures 1 to 5As shown: A device for controlling and extracting toxic and harmful gases generated during blasting includes a borehole 1, a gas collector 12, and an extraction main pipe 19. The borehole 1 is alternately filled with sealing cement 2 and loess drilling mud 3. A buffer layer 9 is pressed against the opening of the borehole 1. The buffer layer 9 is composed of multiple layers of elastic rubber material. A pressure plate 10 is pressed against the buffer layer 9. The surface of the pressure plate 10 is provided with gas guiding grooves 21. The gas guiding grooves 21 have a trapezoidal cross-section and are radially distributed. A steel plate 11 is fixedly installed on the pressure plate 10. Several anchor rods 6 pass through the pressure plate 10 and the steel plate 11 and are tightened by nuts. The anchor rods 6 are threaded with wing nuts 22. The wing nuts 22 are tightly attached to the roof 4 of the tunnel. The top of the gas collector 12... A lifting ring 8 is provided, and a guide vane 14 is provided inside the gas collector 12. A hook 5 is fixedly connected to the top plate (4) of the roadway. The gas collector 12 is hung on the hook (5) through the lifting ring 8. A multi-channel guide pipe 13 is welded to the bottom of the gas collector 12. A steel wire hose 16 is fixedly connected to the guide pipe 13 through a clamp 15. A steel pipe 20 is fixedly connected to the other end of the steel wire hose 16 through the clamp 15. A quick flange 17 is welded to the end of the steel pipe 20. The main exhaust pipe 19 is connected to the steel pipe 20 through the quick flange 17. The quick flange 17 is provided with a sealing ring 18. The sealing ring 18 is made of corrosion-resistant elastic material. A conical airflow pressure stabilizing chamber 7 is provided at the connection between the steel pipe 20 and the main exhaust pipe 19.

[0021] The implementation method of this embodiment is as follows: When blasting is required in borehole 1, after alternately filling the borehole 1 with sealing cement 2 and loess blasting mud 3, the buffer layer 9, the pressure plate 10 and the steel plate 11 are installed in sequence, and finally locked with anchor bolts 6 and nuts; the gas collector 12 is suspended from the top plate 4 of the roadway through the top lifting ring 8, the mine gas drainage pump is turned on in advance, and the steel pipe 20 is connected to the main drainage pipe 19 of the gas drainage pump through the quick flange 17. Through the high negative pressure formed by the pump station, the toxic and harmful substances generated by the blasting are discharged to the ground through the drainage pipeline.

[0022] The above are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A device for controlling and extracting toxic and harmful gases generated during blasting, characterized in that, The system includes a borehole (1), a gas collector (12), and a main exhaust pipe (19). The borehole (1) is alternately filled with sealing cement (2) and loess blasting mud (3). A buffer layer (9) is pressed into the borehole opening of the borehole (1). A pressure plate (10) is pressed into the buffer layer (9). A steel plate (11) is fixedly installed on the pressure plate (10). Several anchor rods (6) pass through the pressure plate (10) and the steel plate (11) and are tightened by nuts. The anchor rods (6) are fixedly connected to the tunnel roof (4). A lifting ring (8) is provided at the top of the gas collector (12). The tunnel roof (4) The gas collector (12) is fixedly connected to a hook (5), and is hung on the hook (5) by a lifting ring (8). The bottom of the gas collector (12) is welded with a multi-channel guide pipe (13). The guide pipe (13) is fixedly connected to a steel wire hose (16) by a clamp (15). The other end of the steel wire hose (16) is fixedly connected to a steel pipe (20) by a clamp (15). The end of the steel pipe (20) is welded with a quick flange (17). The main exhaust pipe (19) is connected to the steel pipe (20) through the quick flange (17). The quick flange (17) is provided with a sealing ring (18).

2. The device for controlling and extracting toxic and harmful gases generated during blasting according to claim 1, characterized in that... The buffer layer (9) is composed of multiple layers of elastic rubber material, and the surface of the pressure plate (10) is provided with air guide grooves (21).

3. The device for controlling and extracting toxic and harmful gases generated during blasting according to claim 1, characterized in that, The gas collector (12) is provided with several guide vanes (14).

4. The device for controlling and extracting toxic and harmful gases generated during blasting according to claim 1, characterized in that, The sealing ring (18) of the fast flange (17) is made of corrosion-resistant elastic material, and a conical airflow pressure stabilizing chamber (7) is provided at the connection between the steel pipe (20) and the main exhaust pipe (19).

5. A device for controlling and extracting toxic and harmful gases generated during blasting according to claim 1, characterized in that... The anchor bolt (6) is threaded with a wing nut (22), which is in close contact with the roof of the roadway (4).

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