废弃井筒老空水探测及疏放技术研究

Study on Detection and Dredging Technology of Goaf Water in Abandoned Wellbore

废弃井筒由于位置难以确定、积水空间小,探测及疏放难度极大,一直是老空水防治的难点。针对四川达州某煤矿废弃井筒水患治理过程中由于井筒位置发生偏移导致钻探放水屡次失败的工程实例,研究分析了钻探失败原因,通过采用物探、钻探等综合探测技术并调整原施工方案及施工工艺,成功地对井筒老空水进行了疏放。

The discarded wellbore is difficult to determine because of its location, and the space of water accumulation is small. Detection and drainage is extremely difficult, has always been a difficult problem in goaf water prevention and control. Aiming at the engineering failures of drilling and water discharge caused by the deviation of wellbore position during the process of abandoning wellbore in a coal mine in Dazhou, Sichuan, the reasons for drilling failure were studied and analyzed. The comprehensive exploration technology such as geophysical exploration and drilling was used to adjust the original construction plan and construction process. Successfully drained the old goaf water in the wellbore.