煤矿井下采空区水复用防水密闭的设计与强度分析

Design and Strength Analysis of Water Reuse Waterproof Sealing in Goaf of Coal Mine

为了保证采空区储水和矿井回采的安全,防止水害的发生,对采空区附属的防隔水煤柱、防水密闭墙的设计和强度进行了分析。分析认为当22110工作面采空区防水密闭墙可承受的安全水头高度最低为7.0 m,储水区限制水位线,即警戒水位线为5.6 m时,能够满足井下矿井水复用的功能。但是考虑到岩石的分化性、吸水性、耐酸碱性的影响,随着时间的推移其抗拉、抗剪强度会衰减,长时间使用后还要定期进行维修保养。

In order to ensure the safety of water storage and mining in goaf,prevent water damage,analyzes the design and strength of waterproof coal pillar and waterproof airtight wall attached to goaf.According to the analysis,when the waterproof sealing wall of the goaf area of 22110 working face can withstand a minimum of 7.0 meters,the water storage area limits the water level line,that is,the warning water level line is 5.6 meters,it can meet the function of underground mine water reuse.However,considering the influence of rock differentiation,water absorption,acid and alkali resistance,the tensile strength and shear strength will be attenuated over time,and maintenance will be carried out periodically after long-term use.