摘要
通过对保德煤矿81503与81504高瓦斯工作面,分别施工平行顺层钻孔和交叉钻孔布置及抽放联管方式的考察,结合现场测试瓦斯抽放流量及浓度等参数,得出了抽放效果较好钻孔布置方式。
The layout mode of parallel borehole and crossed borehole for gas pre-drainage was used in N081503 and No81504 mining face respectively. Combined with the actual measurement of gas flow rate and gas concentration, the rational layout mode of boreholes is determined.
出处
《陕西煤炭》
2014年第4期29-31,41,共4页
Shaanxi Coal
关键词
平行钻孔
交叉钻孔
钻孔布置
抽放效果
parallel borehole
crossed borehole
layout of boreholes
drainage effect
