Method for determining coal mass gas content by advancing face gas emission parametric inversion

A technology of gas emission amount and gas emission, which is applied in the field of coal gas content measurement

Active Publication Date: 2011-02-16
CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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Problems solved by technology

[0024] In view of this, in order to solve the above-mentioned problems, the present invention aims at the online monitoring of underground gas gushing data by the existing coal mine gas monitoring system and the characteristics of underground excavation construction procedures. From the data, the gas emission data at the initial stage of mining and falling coal rock mass affected by mining and the mining and falling away from the tunneling face are extracted, so as to accurately grasp the gas emission amount of the mining and falling coal body and effectively invert the coal mass of the driving face. Gas content

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  • Method for determining coal mass gas content by advancing face gas emission parametric inversion
  • Method for determining coal mass gas content by advancing face gas emission parametric inversion
  • Method for determining coal mass gas content by advancing face gas emission parametric inversion

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Embodiment Construction

[0057] Preferred embodiments of the present invention will be described in detail below.

[0058] see figure 1 , The gas gushing out of the tunneling face can be divided into three types: the gas gushing out of the coal wall of the tunneling face, the gas gushing out of the coal walls of the two sides of the roadway or adjacent coal and rock formations, and the gas gushing out of the falling coal. The coal gas in the excavation face mainly includes non-desorbable gas and desorbable gas. The non-desorbable gas is basically stable, and the desorbable gas is further divided into residual gas from falling coal and desorbed gas.

[0059] At the underground production site, we believe that the residual gas in coal falling is basically stable or does not change much. During blasting, it is considered to be constant or basically zero. In machine digging, the residual gas in coal falling is considered to be affected by the gas content before coal mining. Influenced by the tunneling s...

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Abstract

The invention relates to the technical field of coal mine safety, in particular relating to a method for determining the coal mass gas content by advancing face gas emission parametric inversion, comprising the following steps: acquiring roadway drilling design characteristic parameters, roadway shape design characteristic parameters, roadway blowing rate and working shift, roadway advancing speed and space time correcting parameters; extracting and respectively acquiring the gas emission monitoring data of each working shift from the real-time gas emission monitoring data in a coal mine gas monitoring system, and calculating to acquire the working shift mean value of the gas emission monitoring data of the underground drilling working shift and the non-drilling working shift, and the movement minimum within 30min; and acquiring the gas emission amount characteristic value; and acquiring the gas emission amount by inversion based on the above data. The invention adopts the advancing face gas emission parameters to perform real-time analysis, prediction and inversion on the gas content in coal mass in the front of the advancing face for the first time, thus realizing non-contact continuous prediction and inversion analysis for the advancing face gas content.

Description

technical field [0001] The invention relates to the technical field of coal mine safety, and specifically designs a method for measuring the gas content of a coal body by using the inversion of gas gushing parameters on a driving face. Background technique [0002] The measurement of coal gas content is the main measurement parameter in the current coal mine safety production, and it is the basis of mine roadway layout, ventilation design, drainage design and regional outburst hazard prediction. [0003] Currently, there are two main methods for measuring gas content: indirect and direct methods. [0004] The indirect method for determining the gas content is based on the measured gas pressure of the coal seam, the coal seam adsorption constant value measured in the laboratory and the industrial analysis results, and the Langmuir equation is used to calculate the gas content of the coal body. which is: [0005] X = Vp ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F7/00E21B49/00
Inventor 邹云龙文光才孙东玲赵旭生张庆华韩文骥邓敢博崔俊飞唐韩英覃木广谈国文宁小亮李向东宋志强
Owner CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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