物探与钻探技术在巷道掘进超前探测中的应用

Application of Geophysical Exploration and Drilling Technology in Advance Detection of Tunnel Excavation

山西某矿为资源整合矿井,采用物探与钻探相结合的方法对矿井进行超前探测,通过分析物探成果为钻探工作高效开展提供指导。在3503运输巷掘进至780 m范围时,物探在巷道右帮前方50~100 m范围内探测有低阻区,经综合分析发现该异常区类型为局部富水区而非小煤窑开采破坏区,后采用钻探方式对该低阻异常区进行探测并疏排异常区内积水。3503运输巷通过采用物探与钻探相结合的超前探测技术,可实现掘进前方地质构造、是否存在富水体等探测,可在一定程度提高巷道掘进安全保障能力。

A certain mine in Shanxi is a resource integration mine,which uses a combination of geophysical exploration and drilling to conduct advanced exploration of the mine.By analyzing the results of geophysical exploration,guidance is provided for the efficient implementation of drilling work.When the 3503 transportation roadway was excavated to a range of 780 meters,geophysical exploration detected a low resistance area within a range of 50~100 meters in front of the right side of the roadway.After comprehensive analysis,it was found that the type of the abnormal area was a local water rich area rather than a small coal mine mining area.Afterwards,drilling was used to detect the low resistance abnormal area and drain the accumulated water in the abnormal area.The advanced detection technology combining geophysical exploration and drilling can be used in 3503 transport roadway to detect the tectonics in front of tunneling and whether there is rich water body,which can improve the safety guarantee ability of roadway tunneling to a certain extent.