摘要
瓦斯预抽增透一直是瓦斯治理工作的瓶颈,为了解决这一难题,提出水力压裂增透技术,分析了水力压裂增透技术的原理、水力压裂设备及钻孔布置工艺。在潘一煤矿32321底板巷开展了A组煤水力压裂增透试验,试验表明:压裂区域钻孔抽采半径为原始煤体的2倍;单孔瓦斯预抽纯量为原始煤体的3.5倍;煤层预抽达标时间缩短了51.6%;压裂有效影响半径倾向上达50 m,走向上达70 m,压裂后抽采半径走向上12 m,倾向上10 m,比原始抽采半径5 m增大1倍。
Gas pre- pumping has been a bottleneck of gas control work, in order to solve this problem, hydrofracture permeability improvement technology was proposed, the principle of hydrofracture permeability improvement technology was proposed, hydraulic fracturing and drilling equipment layout process were analyzed. A group hydrofracture permeability improvement technology test was carried out in the bottom of roadway 32321 of Panyi Mine.Tests showed that fracturing drilling drainage area was twice the radius of the original coal, pre- hole gas pumping pure amount was 3.5 times than original coal, pre- drainage standard time by 51.6%, fracture propensity effective radius up to 50 m, up to 70 m on strike,after fracturing extraction radius to 12 m, tendency on 10 m, increased 1 times than the original drainage radius 5 m.
出处
《煤炭与化工》
CAS
2016年第1期38-40,共3页
Coal and Chemical Industry
关键词
瓦斯抽采
水力压裂
增透
抽采效率
有效影响半径
gas control
gas extraction
hydrofracture
permeability improvement
effective radius of influence
