Bag type gas extraction hole plugging device

Abstract

The invention relates to a hole plugging device used for plugging a coal gas extraction hole, in particular to a bag type gas extraction hole plugging device which is suitable for all kinds of drill holes, is good in plugging effect and can adjust the depth of plugging the hole. The pocket type gas extraction hole plugging device comprises a bag body which is made of fabric with breathable and water seepage properties and a slurry injecting connector which is arranged on one end of the bag body which is of a hollow barrel structure; the bag body is sleeved outside a gas extraction pipe and comprises plugging sections and a slurry injecting section; the plugging sections are located at the two ends of the bag body; the slurry injecting section is arranged between the plugging sections; the outer diameter of the plugging sections is larger than the diameter of the gas extraction drill hole to be plugged; the outer diameter of the slurry injecting section is smaller than the diameter of the gas extraction drill hole to be plugged; slurry outlet holes are formed radially in the slurry injecting section; a hoop is sleeved on the opening of each end of the bag body; the inner diameter of the slurry injecting connector is 12mm; the number of the slurry outlet holes is ten; and the pore diameter of each slurry outlet hole is 2-3mm. The bag type gas extraction hole plugging device has the advantages that the structure is simple, the operation is convenient, the depth of plugging the hole is adjustable, the bag body is tightly fitted with a coal bed, and the plugging is tight.

Description

technical field [0001] The invention relates to a hole sealing device for sealing coal mine gas drainage holes, in particular to a bag-type gas drainage hole sealing device which is suitable for various types of drilling, has a good sealing effect and can adjust the sealing depth device. Background technique [0002] With the extension of mine mining depth, many mines have gradually changed from gas mines to high gas or even outburst mines, and the gas problem has become one of the main problems restricting the development of mining areas. The key to gas control is the gas drainage efficiency, and the sealing quality of the drainage borehole is the main factor determining the drainage efficiency. At present, the commonly used sealing devices for gas drainage drilling are complex in structure, inconvenient to install and use, and not very practical underground, and cannot solve the problem of sealing coal fissures generated during drilling well, resulting in poor sealing ef...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the disadvantages of the existing sealing device, which is complex in structure, inconvenient to use, and unable to seal coal fissures, and to provide a simple structure, easy to use, capable of sealing coal fissures, and realizing gas protection. Effective grouting and sealing of drainage holes, better prevention of air leakage cracks around the drilling of the sealing section, bag-type gas drainage hole sealing device with adjustable sealing depth

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