Mining blasting drilling hole sealing device

Abstract

The utility model discloses a mining blasting drill hole sealing device which comprises an extraction pipe, a grouting pump and a grouting pipe, and the grouting pipe extends into a blasting drill hole. A plurality of one-way valves are arranged on the grouting pipe between the opening of the blasting drill hole and the deepest position of the inner side of the blasting drill hole at intervals; the outer side of each one-way valve is connected with an expansion bag, the grouting pipe introduces expansion slurry into the expansion bags, an explosion valve is arranged on the wall of the grouting pipe between every two adjacent expansion bags, a slurry outlet of the grouting pipe is formed in the last expansion bag, and an elastic sealing plug matched with an inlet in size is arranged at the position, located at the inlet of the explosion drill hole, of the grouting pipe. The extraction pipe penetrates through the expansion bag and is inserted into the whole explosion drill hole. The grouting material is used for conducting pressurized grouting on the hole sealing section, the hole sealing section is tightly filled with the grouting material, uniformity and leakproofness are good, safety is high, and efficient and rapid sealing can be achieved. When the device is used for hole sealing, the whole process flow can be completed only by 1-2 persons, and the labor cost and the labor intensity are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of equipment, in particular to a hole - sealing device for mine blasting drilling. Background Art

[0002] In traditional coal mine blasting processes in China, coal electric drills or air - coal drills are mostly used with drill pipes for drilling operations. After inserting explosive detonators into the drilled holes, stemming is used for hole - sealing. In the traditional stemming hole - sealing process for coal mine blasting, manual labor is used to stuff stemming into the holes and a stemming rod is used to compact the stemming. After the sealing is completed, there are many pores left in the holes, with low strength, poor compactness, and difficulty in complete sealing, making it difficult to meet the requirements of deep - hole blasting with large hole diameters and large charge amounts in current coal mine underground. In addition, the traditional hole - sealing method uses manual labor to stuff stemming into the holes for sealing, which requires a large amount of manpower and the hole - sealing quality is unstable, making it difficult to meet the requirements of deep - hole blasting with large diameters and depths. Poor hole - sealing quality not only causes blasting failure but may even lead to perforation accidents, resulting in greater losses. Content of the Utility Model

[0003] To solve the technical problems mentioned in the background art, the utility model provides a hole - sealing device for mine blasting drilling.

[0004] The utility model adopts the following technical scheme: A hole - sealing device for mine blasting drilling includes a gas drainage pipe, a grouting pump, and a grouting pipe; the grouting pipe extends into the blasting drilling hole; several check valves are arranged at intervals between the opening of the blasting drilling hole and the deepest part inside the blasting drilling hole; an expansion bladder is connected to the outside of each check valve, and the grouting pipe injects expansion slurry into the expansion bladder; a blasting valve is arranged on the grouting pipe wall between two adjacent expansion bladders; the slurry outlet of the grouting pipe is arranged inside the last expansion bladder; an elastic sealing plug adapted to the size of the entrance is arranged at the entrance of the grouting pipe in the blasting drilling hole; the gas drainage pipe penetrates through the expansion bladder and is inserted into the whole blasting drilling hole for gas drainage.

[0005] Further, the outside of the expansion bladder is fixed by winding with a wire loop.

[0006] Further, the distance between two adjacent expansion bladders is 1 - 1.5 m.

[0007] Compared with the prior art, the advantages of the utility model are as follows:

[0008] The hole - sealing device for mine blasting drilling designed by the utility model uses grouting material to perform pressure grouting on the hole - sealing section. The slurry in the hole - sealing section is filled tightly, with good uniformity and airtightness, high safety, and can achieve efficient and rapid sealing. Using this device for hole - sealing, only 1 - 2 people can complete the entire process, reducing labor costs and labor intensity. Description of the Drawings

[0009] Figure 1 This is the overall structural schematic diagram of the mine blasting hole sealing device of the present utility model.

[0010] Among them:

[0011] 1 - extraction pipe, 2 - grouting pump, 3 - grouting pipe, 4 - blasting hole, 5 - one-way valve, 6 - expansion bladder, 7 - blasting valve, 8 - elastic sealing plug, 9 - wire ring. Specific implementation manner

[0012] Hereinafter, in order to facilitate the understanding of the technical solution of the present utility model by those skilled in the art, further description will be made with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present utility model.

[0013] In the following detailed description, for the sake of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present utility model. However, obviously, one or more embodiments can also be implemented without these specific details. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present utility model.

[0014] Please refer to Figure 1 , which is the overall structural schematic diagram of the mine blasting hole sealing device of the present utility model, including an extraction pipe 1, a grouting pump 2, and a grouting pipe 3. The grouting pipe 3 extends into the blasting hole 4, and several one-way valves 5 are arranged at intervals between the opening of the blasting hole 4 and the deepest part inside the blasting hole 4. An expansion bladder 6 is connected to the outside of each one-way valve 5. During specific implementation, the distance between adjacent expansion bladders 6 is 1 - 1.5 m, and the surface of the expansion bladder is waterproof to ensure that water does not seep into the space between adjacent bladders from the inside of the expansion bladder. The grouting pipe 3 injects expansion slurry into the expansion bladder 6. A blasting valve 7 is arranged on the wall of the grouting pipe 3 between two adjacent expansion bladders 6. The slurry outlet of the grouting pipe 3 is arranged inside the last expansion bladder 6. An elastic sealing plug 8 adapted to the size of the inlet is arranged at the inlet of the grouting pipe 3 at the entrance of the blasting hole 4 to seal the hole opening and play a role in fixing the pipeline. The extraction pipe 1 penetrates through the expansion bladder 6 and is inserted into the entire blasting hole 4 for gas extraction.

[0015] During specific implementation, after drilling is completed, explosives, detonators, and wires are loaded, and hole sealing is about to be carried out. The expansion bladder is connected to the one-way valve, blasting valve, and grouting pipe. The length of the grouting pipe is reasonably arranged according to the designed hole-sealing length, and the expansion bladder is placed into the hole-sealing section respectively before and after. The slurry enters the expansion bladder through the one-way valve along the grouting pipeline. The bladder expands and finally tightly adheres to the hole wall, blocking both ends of the hole-sealing section. When the slurry pressure in the pipeline reaches the limit of the blasting valve, the blasting valve is opened, and the slurry starts to fill the hole-sealing section between the expansion bladders. Due to the function of the one-way valve, the slurry in the expansion bladder will not flow out. The slurry completely fills the hole-sealing section, and when the grouting pressure reaches the design requirement, the grouting ends. When the slurry is completely solidified, the hole sealing of the blast hole is completed.

[0016] During the specific implementation of this embodiment, the outer side of the expansion bladder 6 is wound and fixed by a wire loop 9 to prevent the expansion bladder from slipping and ensure safe use.

[0017] In summary, for the hole-sealing device for mine blasting drills designed by the present utility model, pressure grouting is carried out on the hole-sealing section using grouting material. The slurry in the hole-sealing section is filled tightly, with good uniformity and tightness, high safety, and can achieve efficient and rapid sealing. Using this device for hole sealing, the entire process can be completed by only 1-2 people, reducing labor costs and labor intensity.

[0018] The above embodiments are only used to describe the preferred implementation manners of the present utility model, and do not limit the scope of the present utility model. Without departing from the design spirit of the present utility model, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present utility model shall fall within the protection scope determined by the claims of the present utility model.

Claims

1. A mining blasting drilling sealing device, characterized in that: The invention comprises an extraction pipe (1), a grouting pump (2), and a grouting pipe (3); the grouting pipe (3) extends into a blasting borehole (4); a plurality of one-way valves (5) are arranged at intervals between the opening of the blasting borehole (4) and the deepest part of the inner side of the blasting borehole (4); the outer side of each one-way valve (5) is connected to an expansion bag (6), and the grouting pipe (3) passes expansion slurry into the expansion bag (6); a blasting valve (7) is arranged on the wall of the grouting pipe (3) between two adjacent expansion bags (6); the slurry outlet of the grouting pipe (3) is arranged in the last expansion bag (6); an elastic sealing plug (8) matching the size of the entrance is arranged at the entrance of the blasting borehole (4); the extraction pipe (1) passes through the expansion bag (6) and is inserted into the entire blasting borehole (4) to extract gas.

2. The mining blasting drilling sealing device according to claim 1 is characterized in that: The outer side of the expansion bag (6) is wound and fixed by a wire ring (9).

3. The mining blasting drilling sealing device according to claim 2, characterized in that: The interval between adjacent expansion bags (6) is 1-1.5 m.

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