Application of directional deep-hole water exploration and release technology in Pingmei No.5 Mine
In order to address the threat posed by water accumulation in the upper goaf of the Pingmei No.5 Mine to the lower coal mining,the spatial position and volume of water accumulation in the current goaf was analyzed.Three drainage schemes were compared from economy,rationality,and time efficiency.The advantages of directional deep-hole exploration and water release technology over conventional technology were analyzed,which proved the directional deep-hole exploration and water release technology was the optimal solution.The design scheme and construction technology of the technology were studied,and on-site application tests were conducted.The Grouting Sealing Technology was adopted,which shortened the sealing time by 88%compared to traditional cement slurry sealing technology.The cumulative discharge of goaf water was nearly 30000 m3,solving the problem of water damage in goaf VI15-32020,achieving economic and protecting the safe excavation of tunnels.
exploration and water releasedirectional drillingmine water hazardsealing technology
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