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
CN101975075AActive Publication Date: 2011-02-16CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
Publication Date
2011-02-16

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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.
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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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