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通过现场调研、实验室试验、数值计算与工业性试验相结合的研究方法,总结了渗水泥化巷道失稳过程及引起其变化的关键因素,分析了天然泥岩矿物组分及其泥化微观过程,模拟了泥化围岩对巷道的破坏结果。结果表明:泥岩各方面性能主要取决于以蒙脱石为主的黏土矿物,并随着黏土矿物尤其蒙脱石水化过程,泥岩微观结构逐步遭到破坏,导致泥岩黏聚力降低,从而出现泥化流变现象,在宏观上引起泥质围岩巷道失稳垮落。最后提出了疏水泄压、强化围岩及构建高强度支护体系的三项安全控制对策,有效解决了泥化巷道失稳问题。
Through the field research, laboratory test, numerical calculation and industrial test, the paper summarized the instability process of infiltration cementing roadway and the key factors that caused its change, and analyzed the natural mudstone mineral composition and its microscopic process , Simulation of the destruction of the surrounding rock roadway results. The results show that all aspects of mudstone performance depend mainly on montmorillonite-based clay minerals, and with the clay mineral, especially the montmorillonite hydration process, the microstructure of mudstone is gradually destroyed, resulting in the decrease of cohesion of mudstone The phenomenon of muddy rheology caused macroscopic collapse of the roadway of muddy surrounding rock. Finally, three safety control measures of drainage pressure relief, strengthening of surrounding rock and building high strength support system are put forward, which effectively solve the problem of instability of muddy roadway.