A gas drainage-water injection integrated pressure grouting sealing device and method

Abstract

The invention discloses a gas drainage-water injection integrated pressure grouting sealing device and method. It includes a drainage pipe, an outer bag grouting pipe and a water injection sealing structure; the top of the drainage pipe is provided with a plurality of extraction pipe eyelets, and the front end and the rear end of the extraction pipe are respectively provided with an outer bag of the drainage pipe, and the drainage pipe An inner bag is arranged inside the front end and the back end of the extraction pipe; the outer bag grouting pipe is set outside the extraction pipe and runs through the two outer bags of the extraction pipe; the water injection sealing structure is set in the extraction pipe Inside the pipe, the water injection sealing structure includes an inner bag grouting pipe and a water injection steel pipe. The present invention can effectively utilize the drainage borehole, and proposes to use the bedding gas drainage hole for water injection in front of the working face. On the one hand, it can solve the construction problem of the water injection borehole and save a lot of drilling construction costs; on the other hand, it can also solve the problem of coal seam The space-time contradiction between gas drainage and coal seam water injection; and solve the problem of sealing holes with water injection on the basis of drainage sealing structure, and realize the integrated sealing of gas-water injection.

Description

technical field [0001] The invention relates to a gas drainage-water injection integrated pressure grouting sealing device and method, belonging to the field of coal mine safety. Background technique [0002] Coal mine dust and gas are two major disasters in mines. On the one hand, the production of coal mine dust can easily cause coal dust explosions in dry and geothermal environments, and on the other hand, it can also cause workers to suffer from pneumoconiosis, which seriously threatens the lives of workers. Physical and mental health. If the gas produced in the coal mining process accumulates beyond the limit, it will easily cause a gas explosion; and when the gas pressure and content in the coal seam are high, it will induce coal and gas outburst under the action of external disturbance. How to effectively prevent and control coal mine dust and gas is a hot issue concerned by scholars at home and abroad. [0003] At present, coal seam water injection to wet the coal ...

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Problems solved by technology

[0005] The object of the present invention is to provide a gas drainage-water injection integrated pressure grouting hole sealing device and method. The present invention can effectively utilize these drainage boreholes, and proposes to use bedding gas drainage holes for water injection in front of the working face On the one hand, it can solve the construction problem of water injection drilling and save a lot of drilling construction costs; on the other hand, it can also solve the space-time contradiction between coal seam gas drainage and coal seam water injection; Water injection to seal the hole to realize the problem of gas-water injection integrated hole sealing

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