A kind of microbial modification filling coal mining method

A technology of microbial modification and filling coal mining, which is applied to filling materials, mining equipment, earthwork drilling and mining, etc., can solve problems such as poor filling effect and violent movement of roof strata, and achieve stable supporting capacity, strength and supporting capacity, and control Effects of rock movement and surface subsidence

Active Publication Date: 2019-04-02
CHINA UNIV OF MINING & TECH
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Problems solved by technology

For the deep mining environment, the filling body is fully compacted and the roof subsidence is further increased, resulting in poor filling effect and violent movement of the roof strata. It is necessary to improve the filling material to deal with the problems caused by high ground stress and high osmotic pressure.

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  • A kind of microbial modification filling coal mining method

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Embodiment Construction

[0010] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0011] A microbial modified filling coal mining method of the present invention, the operation steps include ground microbial calcification of the filling material, transporting the calcified filling material to the goaf for compact filling, and then performing microbial grouting on the filling body to complete mining at each step Microbial g...

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Abstract

A microbial modification filling-based coal mining method, comprising the operation steps of performing ground microbial calcification on a filling material, conveying the calcified filling material to a goaf for tamping and filling, and then performing microbial grouting on a filling body, where microbial grouting and filling is performed after each step of coal mining is completed. By means of microbial filling, the compressive strength of the filling body is effectively improved, environment-friendliness is realized, and the biochemical mechanism-based microbial filling-based coal mining technology in a high-stress deep part is taken to a new direction.

Description

technical field [0001] The invention relates to a microbial modified filling coal mining method, which belongs to the technical field of solid filling coal mining. Background technique [0002] With the increase of mining depth, the deep mining of coal resources is gradually going deep. For the deep mining environment, the filling body is fully compacted and the roof subsidence is further increased, resulting in poor filling effect and violent movement of the roof strata. It is necessary to improve the filling material to deal with the problems caused by high ground stress and high osmotic pressure. [0003] In order to adapt to the deep mining environment, the filling material is prepared and improved by microbial solidification. Microbial solidification, that is, microbial-induced calcium carbonate precipitation technology, is a new type of soil solidification technology. Its principle is to provide nitrogen sources and calcium ion sources to certain specific microorganis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F15/00
CPCE21F15/005
Inventor 张强张吉雄齐文跃李猛孙凯
Owner CHINA UNIV OF MINING & TECH
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