A kind of gas extraction method of plugging and concentration

A technology of gas drainage and gas drainage, which is applied in the field of gas drainage for plugging and enrichment, can solve the problems of reducing gas drainage efficiency, increasing gas drainage costs, and safety hazards of drainage concentration, and achieves good airtight effect , low cost, and the effect of improving the extraction concentration

Active Publication Date: 2022-03-22
CHINA UNIV OF MINING & TECH (BEIJING)
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Problems solved by technology

The low-concentration gas extracted not only reduces the efficiency of gas extraction and increases the cost of gas extraction, but also brings many safety hazards due to the substandard extraction concentration

Method used

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  • A kind of gas extraction method of plugging and concentration
  • A kind of gas extraction method of plugging and concentration
  • A kind of gas extraction method of plugging and concentration

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Embodiment Construction

[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below, obviously, the described embodiments are only some of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention belong to the protection scope of the present invention.

[0040] The present invention will be described in detail below in conjunction with examples. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0041] The present invention can drill holes, drill back, seal holes, inject liquid (inject cement mortar) along the direction of the coal body through the thousand-meter drilling rig system 1, wherein the components of the cement mortar include cement, water and fine aggregate. After the cement mortar i...

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Abstract

The invention provides a gas drainage method for plugging and enriching gas, which belongs to the field of mining technology and includes: drilling along the coal body, and removing chips after the drilling is completed; surrounding the drilling plugging material on the outer wall of the grouting pipe, and The slurry pipe and the drilling plugging material are sent into the predetermined hole sealing depth together. After the drilling plugging material expands, the hole plugging and the installation of the grouting pipe are completed; the cement mortar and cement are injected into the drilling through the grouting pipe. The mortar seeps in the coal body, and the seepage radius is R; the cement mortar and the coal body condense to form a plugging wall; the gas drainage pipe is installed along the coal body, so that the gas drainage pipe passes through the plugging wall, and the gas drainage pipe is installed in place Finally, the gap between the outer wall of the gas drainage pipe and the coal body is blocked to extract gas. The invention can realize the effective plugging of coal wall air leakage in the mining area during the gas extraction process, increase the extraction concentration, prolong the extraction time, optimize the extraction system and reduce the potential safety hazard of gas exceeding the limit during extraction, and improve the Recovery efficiency.

Description

technical field [0001] The invention belongs to the technical field of mining, and in particular relates to a gas drainage method for leak plugging and concentration enhancement. Background technique [0002] Mine gas is one of the main natural factors that seriously threaten the safe production of coal mines. Gas explosions and coal and gas outbursts may cause a large number of casualties and huge property losses. Reducing mine gas content through gas drainage is one of the common technical means for coal mine safety production. one. However, low gas extraction efficiency has become a common problem due to high gas content, strong adsorption, low pressure, and poor gas permeability of coal seams. The improvement of gas drainage efficiency can not only reduce the amount of gas gushing out during the mining process and prevent gas accumulation, but also make use of the extracted gas to turn harm into benefit. [0003] In order to improve the concentration and efficiency of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/00E21B7/04E21B7/20E21B33/13
CPCE21B43/006E21B7/04E21B7/20E21B33/13
Inventor 秦跃平毋凡刘伟张凤杰徐浩褚翔宇赵政舵周禹军刘晓薇梁书菲陈伟
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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