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Gas drainage method with gas adsorption structure being changed by magnetic water

A gas drainage and adsorption structure technology, which is applied in the field of gas drainage where magnetic fluid changes the gas adsorption structure, can solve the problem of low gas drainage rate in mines, and achieve the effect of improving the gas drainage rate

Inactive Publication Date: 2018-09-28
CHINA UNIV OF MINING & TECH (BEIJING)
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Problems solved by technology

[0004] The purpose of the present invention is to provide a new idea to enhance the effect of gas drainage, and to provide a gas drainage method that microscopically changes the adsorption structure of coal pores, so as to solve the problem of low mine gas drainage rate at present

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  • Gas drainage method with gas adsorption structure being changed by magnetic water
  • Gas drainage method with gas adsorption structure being changed by magnetic water
  • Gas drainage method with gas adsorption structure being changed by magnetic water

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with accompanying drawings and examples of implementation.

[0023] Due to the high gas content, poor air permeability, and strong adsorption capacity of coal to gas in the No. 15 coal seam of a mine, although the conventional gas drainage method has been tested many times, it is difficult to improve the drainage effect, and the gas drainage rate is very low. Low.

[0024] According to the coal seam thickness, coal seam inclination, gas content, gas pressure, coal seam permeability and working face oblique length at the mine construction site, the construction drilling is designed. Both the upper row and the lower row of drill holes are drilled in layers, the radius of the gas drainage drill hole is R=90mm, and its depth is D=60m; the radius of the magnetic injection water hole is r=45mm, and its depth is d=60m; the distance between the upper and lower rows of drill holes 2m; the distance between the ...

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Abstract

The invention provides a gas drainage method with a gas adsorption structure being changed by magnetic water, and relates to the technical field of coal and rock gas drainage. The gas drainage methodis characterized in that two rows drilling holes are distributed on a coal seam with low gas drainage efficiency, the upper row drilling holes are gas drainage drilling holes, and the lower row drilling holes are injecting magnetized water holes; a certain amount of magnetized water is injected in the lower row drilling holes, alternating electric field is added on the both sides of a coal seam roadway, and the magnetic water quickly flows in the coal seam by action of the alternating electric field; and the magnetic water has a surface-active action, the gas adsorption structure of coal porous media can be changed, namely, activation energy changes, ability of coal to gas adsorption is reduced, so that gas is infiltrated from coal seam gaps, the extraction rate of the gas is improved, andthe magnetized water plays a role of falling dust in the exploitation process.

Description

technical field [0001] The invention relates to a gas drainage method in which magnetized water changes the gas adsorption structure, and belongs to the technical field of coal and rock gas drainage, in particular to a gas drainage method in which magnetic fluid changes the gas adsorption structure. Background technique [0002] In recent years, my country's coal production has been increasing, the depth of coal mining has been deepening, the gas content in coal seams has increased, and the amount of gas emitted in coal seams has increased during the excavation process. Some coal mines have even significantly increased the risk of outbursts, which seriously threaten the safe and efficient production of coal mines. Coal seam gas is drained to reduce the amount of gas gushing out during mining to ensure safe production. [0003] Gas, also known as coalbed methane, is a clean energy source. Extracting gas from coal seams can not only reduce the release of gas in coal mines and r...

Claims

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Application Information

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IPC IPC(8): E21F7/00E21F17/00
CPCE21F7/00E21F17/00
Inventor 解北京严正李成武
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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