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Abstract Gas release hole in the gas of the mine, the coal (rock) and gas ( CO2 ) has been widely applied in the outburst mines, can improve the gas emission in limited area, reduce the residual gas in the coal, reducing the gas pouring amount is a great supplement to local outburst prevention measures, the gas release hole quality inspection is important. During the mining of the S5206 bypass roadway in the south fifth mining area of Yuwu Mine, φ22L1 600 mm anchor cable core was taken as the testing tool for the quality of the drilling of gas releasing hole.
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