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The Method of Utilizing Microorganisms to Control Coal Mine Gas

A technology for microbial control and coal mine gas, which is applied in separation methods, gas discharge, biosynthesis, etc., can solve the problems of coal seam air permeability coefficient reduction, gas drainage, difficult discharge, long drainage time, etc., to improve mining safety , reduce manpower consumption, and reduce operating costs

Active Publication Date: 2021-03-02
XINWEN MINING GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the mining speed in my country has accelerated and the mining depth has increased in recent years, the ground stress has continued to increase, the gas permeability coefficient of the coal seam has continued to decrease, and gas drainage and discharge have become more and more difficult.
In addition, the drainage time is long, the efficiency is low, a lot of manpower and material resources are wasted, and the effect is not obvious, which seriously restricts the safe production of coal mines.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] In a coal mine in Shandong, the methylotroph Methylophilus (ATCC39866AS1FtrpR) obtained from the American Type Culture Collection (ATCC) was used for gas control.

[0020] First of all, collect the existing data of the mine, including collecting basic information about the outburst history and outburst characteristics of the coal seam. It is found that the high and steep structural area of ​​the coal mine has dense faults, high horizontal stress, severe coal damage, firmness coefficient f value of only 0.4, coal compressive strength of 3-4MPa, extremely low water content of the coal seam, and cohesive properties. Poor, resulting in more coal seam gas outbursts.

[0021] On-site measurement found that the maximum gas content was 16.84m 3 / t, the gas pressure is as high as 4MPa, the limit adsorption capacity of the coal seam is 28.7m3 / t.r, and the gas permeability coefficient of the coal seam is only (0.9-2.3)×10 -4 mD.

[0022] The actual control area of ​​the coal mi...

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Abstract

The invention provides a method for controlling coal mine gas by using microorganisms, which uses microorganisms capable of degrading methane to eliminate gas in coal mines. Specifically, the microorganism capable of degrading methane is Methylophilus methylotrophus. The method of the present invention changes the borehole water injection in the conventional coal mine mining into the culture solution of microorganisms that can degrade methane, degrades the gas in the coal body, reduces the gas concentration, makes it unnecessary to perform gas drainage and discharge operations, and significantly reduces manpower consumption. , reduce operating costs and improve mining safety.

Description

technical field [0001] The invention relates to the technical field of coal mine gas treatment, in particular to a method for treating coal mine gas by utilizing microorganisms. Background technique [0002] Gas refers to the harmful gas mainly consisting of methane in mines, sometimes methane alone. Gas is a colorless, tasteless, odorless, flammable or explosive gas. It is insoluble in water and has a higher diffusivity than air. Gas is non-toxic, but in high concentrations it can cause suffocation. When the coal seam is mined, if the coal body is damaged or affected by mining, part of the gas stored in the coal body will leave the coal body and flow into the mining space. This phenomenon is called gas gushing. According to reports, a large number of major coal mine safety accidents in the world are explosions, suffocation and other accidents caused by gas. In addition, in recent years, there are also a large number of casualties caused by underground projects (tunnels, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N1/20C12N1/21E21F7/00
CPCB01D53/72B01D53/84B01D2251/95B01D2257/7025E21F7/00Y02C20/20Y02P20/59Y02A50/20
Inventor 王业平纪维新范珂陈德任王登科杨勇焦浩
Owner XINWEN MINING GROUP
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