寺河二号井本煤层瓦斯抽放钻孔间距研究  

Study on Gas Drainage Hole Space of Sihe Second Coal Mine Coal Seam

作　　者：卫晋鹏 

机构地区：[1]晋城金成矿山建筑工程有限责任公司,山西晋城048000

出　　处：《煤矿现代化》2016年第1期53-55,共3页Coal Mine Modernization

摘　　要：以寺河二号井15301工作面为试验对象,在153011巷掘进期间,采用113mm交叉钻孔布孔方式,分别采用4m、6m、8m、10m 4种钻孔间距进行15号煤本煤层瓦斯抽放试验。结果表明:钻孔间距对于极限抽放量和最大预抽率影响较大,钻孔间距由10m减小到4m,瓦斯极限抽放量增加15%,最大预抽率由20%增大到25%,达到最大预抽率所需抽放时间由240d减少到180d;钻孔间距由6m较小到4m,瓦斯极限抽放量变化很小,确定钻孔间距为6m;抽放时间超过180d,抽放速率明显下降。Set 15301 workface of Sihe Second Coal Mine as test object, doing 15# coal seam gas drainage experiment with 4 meters,6 me- ters ,8 meters, 10 meters these four kinds of hole space and 113 millimeters cross hole during 153011 roadway＇s driving. Results show： The hole space has a great influence on the maximum drainage volume and maximum pre pumping rate, the hole space is reduced from 10m to 4m, the gas drainage volume increases by 15%, the maximum pumping rate increases from 20% to 25%, and the maximum pre pumping rate is reduced from 240 days to 180 days ; the hole space is reduced from 6 meters to 4 meters, and the maximum drainage volume＇s change is very small, so set hole space as 6 meters, drainage for more than 180 days, drainage rate decreased significantly.

关 键 词：瓦斯抽放 钻孔间距 极限抽放量 最大抽放率 

分 类 号：TD353[矿业工程—矿井建设]