Coal-bed gas extraction effect dynamic evaluation method

Abstract

The invention relates to a coal-bed gas extraction effect dynamic evaluation method. Through theories and techniques such as coal-bed extraction gas flow theory, extraction goal attainment judgment, monitoring, mathematical inversion and underground gas parameter determination, extraction effect valuation, extraction effect real-time evaluation and extraction effect actual measurement verification are respectively implemented to the coal-bed gas extraction effect respectively at three stages, i.e., before extraction, during extraction and at the late stage of extraction, the unbalance of extraction-digging-mining operation due to a tense or insufficient coal-bed gas pre-extraction period can be effectively avoided, the coal-bed gas extraction effect dynamic evaluation method can effectively guide a coal mine to implement gas extraction fine management, the effects of synchronous planning of coal-bed gas extraction and mining operation, advanced designing and advanced extraction can be realized, and the overall planning and the coordinated development of gas and coal can be realized.

Description

technical field [0001] The invention relates to a dynamic evaluation method for the gas drainage effect of coal seams, in particular to the evaluation method for the gas drainage effect of high gas or coal and gas outburst mines. Background technique [0002] Coal bed gas (coal bed methane) is an important hidden danger of coal mine production safety accidents, and it is also a new type of high-quality energy. Rational development and utilization of mine gas resources can not only ensure the safe and efficient production of coal mines, but also help to optimize the energy structure and promote energy conservation and emission reduction. However, under the current conditions of high-intensity coal mining, high gas or coal and gas outburst mines lack the guidance of relevant theories and methods in the design of gas drainage technology and management of drainage operations, resulting in coal seam gas drainage period Insufficiency or insufficiency causes the unbalanced connect...

AI Technical Summary

Problems solved by technology

However, under the current conditions of high-intensity coal mining, high gas or coal and gas outburst mines lack the guidance of relevant theories and methods in the design of gas drainage technology and management of drainage operations, resulting in coal seam gas drainage period Insufficient or insufficient mine drainage-excavation-mining operations are unbalanced, resulting in the mutual restriction between gas drainage and coal mining.

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