Shigang Coal Industry Co.,Ltd.is a prominent mine with a relatively high gas content in 15#coal seam.In order to solve the gas problem in 15#coal seam,a comprehensive analysis of the basic gas situation in 15#coal seam was conducted,and measures for gas pre-extraction were formulated.Corresponding measures were taken for roadway excavation and working face recovery,with a pre-extraction control range of 15 m on both sides of the roadway contour line and a hole spacing of 4 m;the spacing between pre-drilled holes at the working face was 2 m,and the extraction radius was 1 m.Through post production performance evaluation,the standard pre-extraction period of 15107 working face was 180 d,and the pre-extraction drilling through the layers had a good effect on the extraction of the excavation roadway.
关键词
突出矿井/瓦斯预抽/穿层钻孔/顺层钻孔/效果考察
Key words
outburst mines/gas pre-extraction/drilling through layers/horizontal drilling/effect assessment
维普
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