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Hole sealing method for coal bed gas drainage drill hole

A coal seam gas and hole sealing device technology, which is applied in the direction of gas discharge, earthwork drilling, sealing/seal, etc., can solve the problems of gas leakage at the orifice, poor sealing of drilling holes, and clogging of coal dust, so as to improve the sealing hole depth, improve gas drainage rate, and avoid the effect of lax hole sealing

Inactive Publication Date: 2015-01-28
HUAIYIN INSTITUTE OF TECHNOLOGY +1
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AI Technical Summary

Problems solved by technology

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a hole sealing method for coal seam gas drainage drilling, which solves the problem of coal dust clogging in the process of gas drainage, and avoids the problem of drilling hole sealing. Strict, orifice gas leakage phenomenon, greatly improving the drilling gas drainage rate

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  • Hole sealing method for coal bed gas drainage drill hole
  • Hole sealing method for coal bed gas drainage drill hole
  • Hole sealing method for coal bed gas drainage drill hole

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] as attached figure 2 , 3 As shown in and 4, the drilling radial hole sealer involved in the present invention includes a coupling piece 9, a main suction pipe 1, an auxiliary suction pipe 2, a rear pocket 4, a front pocket 3, a grouting pipe 5, and a grout return Pipe 7 and blasting valve 8, one end of the main drawing pipe 1 is connected to the coupling 9, the length of the main drawing pipe 1 is 3-10m, the outer diameter and inner diameter are 50mm and 48mm respectively, the pipe wall of the main drawing pipe 1 Circular holes 18 are distributed around, the connector 9 is in the shape of a cone, and the surface of the connector 9 is distributed with oval holes 19. The other end of the main suction pipe 1 is connected to the secondary suction pipe 2, and the secondary suction pipe 2 The length is 5-20m, and the outer diameter and inner diameter are 50mm and 4...

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Abstract

The invention discloses a hole sealing method for a coal bed gas drainage drill hole, which is suitable for tightly closing the gas drainage drill hole in a high-gas coal mine. The hole sealing device mainly comprises a main pumping pipe, an auxiliary pumping pipe, a front bag, a rear bag, a grouting pipe, a perforated pipe, a connecting piece, a grout return pipe and an explosion valve. The method can greatly increase the hole sealing depth, solve the coal dust blocking problem during the gas extraction process, ensure high density and strength of the filled clearance between the drill hole wall and the pumping pipe groups by the grout coagulation body, avoid the phenomena that the drill hole is not tightly sealed or the gas is leaked from the hole, and greatly increase the drill hole gas drainage rate.

Description

technical field [0001] The invention is used in the field of sealing boreholes for gas drainage in high-gas coal mines, and in particular relates to a drilling sealing method for gas drainage in coal seams. Background technique [0002] Among the five major disasters of gas, dust, fire, water and roof in my country, the coal seam gas disaster has become one of the most serious accident types in the coal mine production process in recent years due to its characteristics of large damage, many casualties, and high accident frequency. Drilling and pre-drainage methods are commonly used in coal mines to reduce coal seam gas concentration. Under certain conditions of gas adsorption, extraction equipment and other influencing factors, the drainage rate is directly related to the sealing effect of drilling. The existing sealing methods mainly include: cement mortar sealing, yellow mud sealing, polyurethane sealing and traditional hole sealing. However, although the cement mortar or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/10E21F7/00
CPCE21B33/10E21F7/00
Inventor 任建红严红殷伟
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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