Comprehensive exploration and control of goaf water hazard in closed mine
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.
closed minesgoaf water hazardthree-dimensional seismic methodelectrical explorationdrillingwater drainage
NETL
NSTL
万方数据
