Practice of Gas Extraction through Long Drilling in Working Face 4314 of Layer 3 in Chengzhuang Coal Mine
In response to the serious threat posed by gas outburst in the large mining height working face of the fourth panel area of the third layer of Chengzhuang Coal Mine to the safety production of the mine,a gas pre-extraction plan for ordinary long boreholes in the third layer was determined by comparing the gas pre-extraction test results of ordinary long boreholes arranged according to different aperture sizes.This provides effective measures for gas control and improves extraction efficiency.The gas pre-extraction effect of the working face has achieved the expected goal.
high gas minedrilling along the layer lengthpre-extraction
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