Drilling and sealing method for gas drainage from coal seam

A technology for extracting gas and coal seam, which is applied in the field of drilling and sealing for gas extraction in coal seams, can solve the problems of complicated sealing process, gas leakage in drilling, shallow sealing depth, etc., achieves good sealing and isolation effect, and avoids waste of resources. , The effect of large sealing depth

Inactive Publication Date: 2010-11-17
山西华阳集团新能股份有限公司
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  • Abstract
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Problems solved by technology

The coal seams in Yangquan Coal Mine Area, Shanxi Province generally have poor air permeability. The method of gas drainage is mainly used to seal holes with linen wrapped in polyurethane.
For example, the gas extraction concentration of mines such as Xinjing Mine, No. 1 Mine, and No. 2 Mine of Yangquan Coal Group is only about 5%-20%. The extraction concentration is too low, which not only affects the gas drainage effect, but also restricts the gas utilization in the Yangquan mining area.

Method used

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  • Drilling and sealing method for gas drainage from coal seam

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Embodiment Construction

[0014] Both ends of the tubular cloth bag 5 have two adhesive buttons 3, 4 and a snap ring 1 respectively, and the two adhesive buttons 3, 4 are located on both sides of the snap ring 1 respectively. The clasp 1 is made of a thin steel plate with a thickness of 0.3-0.5 mm and a width of 10 mm, and its size matches the outer circumference of the gas extraction pipe 2 .

[0015] The gas extraction pipe 2 penetrates through one end of the tubular cloth bag 5 and exits from the other end; fasten the adhesive buttons 3 and 4 at both ends of the tubular cloth bag 5 and fasten the snap ring 1 so that the tubular cloth bag 5 and the gas extraction The sampling pipes 2 are tightly connected together. The tubular cloth bag 5 is provided with two tightening belts 6 to prevent the cloth bag from falling down along three equal parts of the length direction. Open the zipper 7, quickly put the filling material with expansion properties into the tubular cloth bag 5, close the zipper 7, and q...

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Abstract

The invention discloses a drilling and sealing method for gas drainage from a coal seam, and aims to ensure simple process, easy operation, high sealing depth and good sealing and insulating effect. The method comprises the following steps of: drilling in the coal seam with a drill according to drill-hole arrangement parameters of the coal seam; allowing a gas drainage tube to pass through a cylindrical cloth bag; fastening sticking buttons and snapping a snap ring at the two ends of the cylindrical cloth bag so as to fixedly connect the cylindrical cloth bag and the gas drainage tube together; unzipping the cylindrical cloth bag and uniformly and rapidly packaging a filler with expansion property into the cylindrical cloth bag; zipping the bag and rapidly feeding the cylindrical cloth bag in which the filler is packaged and the gas drainage tube together into the drill hole; automatically and completely blocking the drill hole after the filler in the cylindrical cloth bag is expanded; and connecting the gas drainage tube to a gas drainage pump for gas drainage.

Description

technical field [0001] The invention relates to a coal mine gas control method, in particular to a coal seam gas drainage drilling and sealing method. Background technique [0002] Coal seam gas drainage generally uses a gas pump to extract high-concentration gas from the coal seam, and drains the high-concentration gas to the ground through a pipe network isolated from the roadway. Coal seam gas drainage is an effective method to solve the gas gushing out of the working face and prevent the gas from exceeding the limit. The vast majority of coal seams in my country are low-permeability coal seams. Due to factors such as drilling sealing and gas leakage, the gas extraction concentration of most low-permeable coal seam mines in my country is too low, and the low-concentration gas is difficult to use or the utilization cost is too high, causing the gas extracted in most mining areas to be directly discharged into the air. empty. Not only cause waste of resources, but also po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/13E21F7/00
Inventor 赵长春樊国成赵庆珍王徽宁韩志斌王在胜张嘉伟
Owner 山西华阳集团新能股份有限公司
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