Research on Gas Control Technology for High Altitude Directional Long Drilling of Roof
In order to solve the problem of gas exceeding the limit in the 15124 working face of Xinjing Mine,based on the"O"ring theory and gas extraction mechanism,a directional long drilling gas treatment technology for the working face is proposed.The parameters of the directional long drilling technology are determined according to the actual situation on site.The on-site practice results show that using the directional long drilling gas treatment technology,the maximum pure gas flow rate of a single hole reaches 10.1％,and the gas concentration reaches 0.2 m3/min,effectively ensuring the safe recovery of the underground working face.
working facegas exceeding limitdirectional long drillingtechnical parameter
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