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Method for predicting gas emission quantity of working face under pressure relief condition

A gas gushing volume and gas gushing technology, which is applied in the field of gas gushing volume prediction of working face based on pressure relief conditions, can solve the problems of inaccurate gas gushing volume prediction and so on.

Inactive Publication Date: 2015-08-26
CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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Problems solved by technology

[0004] In view of this, the object of the present invention is to provide a method based on the prediction of the gas emission of the working face under the pressure relief condition, which solves the problem of inaccurate prediction of the gas emission of the mining face under the pressure relief condition, thereby Better guide the safe recovery of the working face

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  • Method for predicting gas emission quantity of working face under pressure relief condition
  • Method for predicting gas emission quantity of working face under pressure relief condition
  • Method for predicting gas emission quantity of working face under pressure relief condition

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Embodiment Construction

[0030] A method for predicting the amount of gas gushing out of a working face based on the pressure relief condition of this embodiment includes the following steps:

[0031] a. Determine the source composition of the gas emission in the mining face. The source of the gas emission in the mining face includes the gas emission from the coal wall, the gas emission from the mined coal, the gas emission from the coal left in the goaf or / and the gas emission from adjacent layers.

[0032] b. Calculate the amount of gas emission from each gas emission source separately. The amount of gas emission in the mining face mainly depends on the intensity of gas emission from the gas source. Usually, it is calculated by the amount of gas emitted per square meter of coal wall per unit time. Indicates the gas gushing intensity of the coal wall, and the gas gushing intensity of falling coal is expressed by the amount of gas gushing per ton of coal per unit time. in,

[0033] The formula for ca...

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Abstract

The invention discloses a method for predicting the gas emission quantity of a working face under the pressure relief condition. The method comprises the following steps: a, determining the gas emission compositions of a stope face, which comprise coal wall gas emission, falling coal gas emission, gas emission from residual coal in goaf or / and adjacent-layer gas emission; b, respectively calculating the emission quantities of all gas emission sources; c, according to the emission quantities of all the gas emission sources, calculated in the step b, predicting the gas emission quantity of the stope face, and building a gas emission quantity prediction mathematical model under the exploitation condition of an underlying remote protective layer. The method solves the problem of inaccurate gas emission prediction of the stope face under the pressure relief condition, so as to better guide safe mining of the working face.

Description

technical field [0001] The invention relates to the technical field of coal mine safety, in particular to a method for predicting the amount of gas gushing out of a working face based on pressure relief conditions. Background technique [0002] At present, the AQ standard is usually used in China for the calculation of the gas emission of the mining face. The gas emission of the working face is simply divided into two parts: the adjacent layer and the coal seam for prediction. The classification is general and broad. Analysis It is not comprehensive enough and the predictions lack accuracy. Moreover, there is no method for predicting gas emission from working faces under the condition of pressure relief and drainage. [0003] Therefore, it is necessary to propose a method for predicting the gas in the mining face, so as to better guide the safe mining of the working face based on the prediction of the gas emission of the working face under the condition of pressure relief. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F7/00G06F19/00
Inventor 文光才张光德王建周光华邹银辉张志刚周勇程建圣张占国黄光利冀超辉龚选平孙炳兴程波李大勇刘俊徐腾飞张林良
Owner CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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