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Deformation Evolution Experimental Research of Gas Extraction
Author(s): 
Pages: 4-6,80
Year: Issue:  12
Journal: Coal

Keyword:  the experiment platformin-situ stressextraction locationevolution;
Abstract: By use of the research and development stress field of the gas extraction experiment platform,analyses the stress and extrac-tion location two factors in the process of coal seam gas extraction influence on deformation,got the experimental model and all the parts of the different distance coal extraction position in time and space evolution.Results show that the gas extraction in the process of de-formation and intense,slow,slow three stages;cooal deformation amount affected by extraction location and ground stress comprehensive when by ground stress is large,amount of deformation is decided by in-situ stress size and in-situ stress were similar,when suffered deformation of coal is determined by the distance extraction position distance;drilling extraction from late due to large deformation a-mount,extraction effect is poorer,anti-reflection is required to increase the quantity of gas drainage.
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