Jinfeng Coal Mine, CHN Energy Ningxia Coal Industry Co. , Ltd.
CCTEG Xi’an Research Institute (Group) Co. , Ltd.
Shaanxi Key Laboratory of Preventing and Controlling Coal Mine Water Hazard

为了有效避免关闭矿井采空区水害的发生,采取物探结合钻探的方法对采空区积水进行探查,并采用了井上下综合治理措施。根据地震波在采空区的异常,利用三维地震圈定了采空区的位置和范围。基于采空区与围岩电阻率存在较大差异,采用瞬变电磁法确定了低阻异常区,进一步对采空区进行了探查。通过地面钻孔对三维地震和瞬变电磁法圈定的采空区进行了验证,同时利用揭露采空区的钻孔采取可控源充电法探查采空区,采用了不同频率的电位差等值线,验证了采空区的范围和位置。在完成了利用物探和钻探对关闭矿井采空区的探查后,分别采用井下常规钻孔和长距离定向钻孔对采空区积水进行了疏放,并通过地面大口径钻孔结合大流量高扬程潜水泵和管道增压泵对采空区积水进行了抽排。研究结果表明:物探结合钻探的方法可以准确圈定关闭矿井采空区位置和范围,利用井下钻孔和地面钻孔分别对采空区积水进行疏放和抽排,可以有效解除关闭矿井采空区水害对周边生产矿井采掘活动的威胁。

In order to effectively avoid the occurrence of goaf water hazard, the method of geophysical exploration combined with drilling in goaf area is explored, and the comprehensive treatment measures are adopted. Based on seismic wave anomalies in the gob, the location and scope of the goaf region are delineated by three-dimensional seismic. There is a great difference between the resistivity of goaf area and surrounding rock. The low - resistivity anomaly area is determined by transient electromagnetic method, and goaf area is further explored. The goaf area delimited by three-dimensional seismic and transient electromagnetic method is verified through the construction of ground drilling, and the goaf area is explored by controlled source charging method and exposure of goaf opening. The potential difference contour lines in different frequencies are used to verify and correct the scope and location of goaf area. After the exploration of goaf area in closed mine by geophysical exploration and drilling, goaf water is drained by underground long distance directional drilling and ground drilling respectively, and is also pumped out by the ground large-diameter drilling with high-flow submersible pump and booster pump through pipeline. The research results show that the location and scope of goaf area can be accurately delineated by geophysical exploration and drilling, and goaf water can be drained and pumped by underground drilling and ground drilling respectively, which effectively solves the threat of goaf water hazard to the surrounding coal mines.

陕西省自然科学基础研究计划(2023-JC-ZD-27)

陈自新,赵宝峰,赵俊杰.关闭矿井采空区水害综合探查与治理技术[J].煤炭工程,2024,56(12):60-66.