Long Borehole Gas Extraction Technology in Overlying Rock Fracture Zone
In order to study the application technology of gas extraction through overlying rock fracture drilling in the 3101 working face of Yong'an Hongtai Coal Industry,the principle of overlying rock fracture drilling and extraction is analyzed,and UDEC software is used to explore the development height of roof fracture zone under working face mining conditions,and drilling parameters are designed.Monitor and verify the effectiveness of gas extraction by monitoring the volume fraction of gas extraction.The results show that the extraction volume fraction shows a trend of inverted"V"-shaped evolution,and the gas volume fraction in the upper corner decreases from 0.55%to 0.35%,indicating that the alternate stubble pressing arrangement of the drilling group is scientifically reasonable.
Overlying rock fracture drillingGas extractionGas governanceGoaf
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