Study on attenuation law of gas drainage flow in borehole passed through seam with different inclined floor
Lyu Youchang
Zhu Chuanjie
Abstract：In order to study the borehole inclination affected to the evolution law of the gas drainage flow,according to the borehole layout passed through the seam along the floor in Pingmei No.12 Mine,a site test method was applied to study the residual gas pressure distribution conditions around the gas drainage boreholes under 17 different inclinations and the gas drainage flow was measured at the site.The study showed that there were three evolution laws occurred in the gas drainage flow of the boreholes,which was negative index attenuation,positive index attenuation and negative index attenuation with increasing first and then decreasing.In addition,the gas drainage flow of the boreholes near two high inclination was high and the gas flow of the boreholes passed through the driving seam with a low elevation was higher than the gas drainage pure volume from the boreholes passed through underneath strata.
Keywords：borehole passed through seamgas drainageborehole inclinationgas hazard
Publication Date：2017-01-01
Pages：6( 74-79 )