Water gun clay explosion-proof device for railway gas tunnel face blasting

Abstract

The utility model discloses a railway gas tunnel face blasting water mortar explosion -proof device, including setting in the water mortar bag body of blast hole outside explosive outside, the outside of water mortar bag body is equipped with the liquid filling pipe for extending to blast hole outside and used to the water of water mortar bag body, be equipped with one -way liquid inlet valve on the liquid filling pipe, the top of water mortar bag body still is equipped with the pressure -relief valve of the gas of water mortar bag body in -out, the utility model discloses can effectively solve the problem that traditional water mortar bag body is easy to be scraped in the process of being inserted into blast hole under the water -filled state.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction and blasting safety technology, and in particular to a water-based mud explosion-proof device for blasting at the working face of a railway gas tunnel. Background Technology

[0002] In railway gas tunnel construction, face blasting is a critical step in the excavation process, but it also carries extremely high safety risks. When gas gushing from the tunnel mixes with air, it can easily trigger a catastrophic explosion upon encountering an open flame, high temperature, or shock wave. Water-based mud, a mature and effective explosion-proof measure in blasting operations, works by utilizing the heat absorption of water vaporization during blasting to reduce the blast temperature, suppress sparks, dilute the gas concentration, and effectively reduce dust. However, traditional water-based mud bags (usually plastic film bags) are typically filled with water and then stuffed into the blast hole. During this process, they are easily torn by the rough rock surface or sharp protrusions on the inner wall of the blast hole, causing premature water leakage and rendering the bag ineffective at the critical blasting moment, severely weakening its explosion-proof effect. Summary of the Invention

[0003] The purpose of this utility model is to provide an explosion-proof device for water-filled mud in railway gas tunnel face blasting, so as to solve the problem mentioned in the background art that the traditional water-filled mud bag is easily torn when it is stuffed into the blast hole in a water-filled state.

[0004] To address this, the present invention provides a water-based mud explosion-proof device for blasting at the face of a gas tunnel in a railway, comprising a water-based mud bag body disposed outside the explosive in the blast hole, a filling pipe extending to the outside of the blast hole for filling the water-based mud bag body with water, a one-way inlet valve on the filling pipe, and a pressure relief valve at the top of the water-based mud bag body for venting the gas inside the water-based mud bag body.

[0005] Specifically, a rubber retaining ring is integrally formed on the outer peripheral wall of the water cannon mud bag body, which abuts against the inner wall of the cannon hole.

[0006] Specifically, the pressure relief valve is located near the outer side of the water cannon mud bag body, and multiple rubber retaining rings are arranged along the axial direction of the water cannon mud bag body, with the multiple rubber retaining rings located inside the pressure relief valve.

[0007] Specifically, the borehole is provided with drilling mud on the outside of the water-filled drilling mud bag.

[0008] Specifically, the inlet end of the filling tube is provided with a connecting thread.

[0009] Compared with the prior art, the present invention has the following beneficial effects: by improving the water cannon mud bag body, the water cannon mud bag body can be filled with water inside the cannon hole. First, the empty and shriveled bag body is safely placed into the cannon hole, and then water is filled into it through the external pipe, thereby avoiding damage to the water-filled bag body during the insertion process of the traditional method. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the explosion-proof device structure of this utility model; In the diagram: 1. Blasting hole; 2. Explosive; 3. Water-filled mud bag; 4. Filling pipe; 5. One-way inlet valve; 6. Pressure relief valve; 7. Rubber retaining ring; 8. Blasting mud. Detailed Implementation

[0011] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0012] See Figure 1 A water-filled mud explosion-proof device for blasting at the working face of a railway gas tunnel includes a water-filled mud bag 3 installed outside the explosive 2 inside the blast hole 1. A filling pipe 4 extending outside the blast hole 1 is provided on the outside of the water-filled mud bag 3 for filling the water-filled mud bag 3 with water. A one-way liquid inlet valve 5 is provided on the filling pipe 4. A pressure relief valve 6 is also provided on the top of the water-filled mud bag 3 to discharge the gas inside the water-filled mud bag 3.

[0013] When using the above-mentioned device for tunnel face blasting, first, drill a blast hole 1 on the tunnel face according to the design requirements. Then, check that the water-filled mud bag 3, filling pipe 4, one-way inlet valve 5, and pressure relief valve 6 are properly connected and undamaged; at this point, the bag should be in a deflated, unfilled state. Next, load the explosive roll 2 into the bottom of the blast hole 1 according to the designed loading structure. Then, gently insert the deflated water-filled mud bag 3 into the blast hole 1, positioning it outside the explosive roll 2 (i.e., between the explosive roll 2 and the blast hole opening). Carefully lead the filling pipe 4 out of the blast hole 1 and connect it to the water-filling equipment. Simultaneously, ensure that the pressure relief valve 6 is located at the top of the water-filled mud bag 3 to allow for timely gas release. Using the water-filling equipment, inject the set amount of water into the water-filled mud bag 3 through the filling pipe 4, causing the water-filled mud bag 3 to expand and adhere to the borehole wall. During the water filling process, the air inside the bag will be compressed by the water and discharged from the pressure relief valve 6 at the top. After filling with water, remove the filling equipment. At this point, the water inside the bag will not flow back due to the one-way inlet valve 5. Finally, on the outside of the water-filled mud bag 3 (i.e., the side closer to the borehole 1), use traditional clay mud 8 or other specified plugging materials to fill and compact it. After confirming that all boreholes 1 have been filled according to this procedure, connect the detonation wire according to the procedure and prepare for detonation.

[0014] This embodiment improves the water cannon mud bag 3 so that the water cannon mud bag 3 can be filled with water in the cannon hole 1. Because the water cannon mud bag 3 is not filled with water and is shriveled, it encounters little resistance when inserted into the cannon hole 1 and can be easily inserted into the cannon hole, thereby avoiding the problem of it being easily torn after being filled with water.

[0015] See Figure 1 In some embodiments, a rubber retaining ring 7 is integrally formed on the outer peripheral wall of the water cannon mud bag 3, which abuts against the inner wall of the borehole 1. This design allows water and explosion products to mix to the greatest extent, can quickly absorb the heat of the explosion, significantly reduce the temperature of the explosion gas and fragments, and greatly reduce the possibility of igniting underground gas or coal dust.

[0016] See Figure 1 In the actual design, the pressure relief valve 6 is set close to the outside of the water cannon mud bag body 3, and multiple rubber retaining rings 7 are set along the axial direction of the water cannon mud bag body 3. The multiple rubber retaining rings 7 are located inside the pressure relief valve 6. This design not only further ensures the reliability of the seal, but also does not affect the venting of the pressure relief valve 6.

[0017] Specifically, a mud 8 is provided inside the blast hole 1 on the outside of the water-filled mud bag 3, and the inlet end of the filling pipe 4 is provided with a connecting thread. The filling pipe 4 is quickly connected to the water filling equipment through the connecting thread.

[0018] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A water-based mud explosion-proof device for blasting at the face of a railway gas tunnel, comprising a water-based mud bag (3) disposed outside the explosive (2) inside the blast hole (1), characterized in that: The outer side of the water cannon mud bag body (3) is provided with a filling pipe (4) extending to the outside of the cannon hole (1) for filling the water cannon mud bag body (3) with water. The filling pipe (4) is provided with a one-way liquid inlet valve (5). The top of the water cannon mud bag body (3) is also provided with a pressure relief valve (6) for venting the gas inside the water cannon mud bag body (3).

2. The explosion-proof device for water-based mud blasting at the face of a railway gas tunnel according to claim 1, characterized in that: The outer peripheral wall of the water cannon mud bag body (3) is integrally formed with a rubber retaining ring (7) that abuts against the inner wall of the cannon hole (1).

3. The explosion-proof device for water-based mud blasting at the face of a railway gas tunnel according to claim 2, characterized in that: The pressure relief valve (6) is located near the outer side of the water cannon mud bag body (3), and multiple rubber retaining rings (7) are arranged along the axial direction of the water cannon mud bag body (3), with the multiple rubber retaining rings (7) located inside the pressure relief valve (6).

4. The explosion-proof device for water-based mud blasting at the face of a railway gas tunnel according to any one of claims 1-3, characterized in that: Inside the borehole (1), outside the water-filled mud bag (3), there is also a mud (8).

5. The explosion-proof device for water-based mud blasting at the face of a railway gas tunnel according to any one of claims 1-3, characterized in that: The liquid inlet end of the filling tube (4) is provided with a connecting thread.

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