摘要
华北型煤田下组煤底板下多为高水压、大水量的灰岩含水层,开采面临严重的突水危险。地面区域超前探查与治理是治理水患的根本方向和有效方法,羽状分支水平孔是实施地面区域超前探查与治理的有效途径方法,得到了广泛应用。对已实施的近80000m钻探工作量羽状分支水平孔的施工经验教训进行总结,提出了羽状分支水平孔设计、施工等方面的认识与体会。
Under the North China typed coalfield lower coal group floor mostly has high pressure, large water yield limestone aquifer conditions, the coal mining faces serious risk of water bursting. Surface regional advance search and governance is fundamental orientation and effective method for water hazard governance. The pinnately branched horizontal borehole is effective way to implement surface regional advance search and governance, thus the method has been widely used. After the summing up of operation experience and lessons from implemented near 80,000m drilling workload of pinnately branched horizontal boreholes have proposed cognition and experience on design and operation aspects.
作者
王永全
Wang Yongquan(Hydrogeologieal Exploration Bureau,CNACG,Handan,Hebei 05600)
出处
《中国煤炭地质》
2018年第A01期84-89,共6页
Coal Geology of China
关键词
高承压含水层
水害防治
定向孔
钻进技术
high pressure confined aquifer
water hazard control
directional borehole
drilling technology
