深部巷道交岔点围岩变形及稳定性研究

Research on Deformation and Stability of Wall Rocks in Intersection of Laneway in Deep Mine

针对深部软岩巷道设计、支护和围岩稳定性控制方面存在的问题,通过数值模拟正交试验得出水平应力作用角、侧压系数、岩体强度和分岔角等主要地质结构因素对深部软岩巷道交岔点围岩变形和稳定性的影响变化规律.研究表明,与可控因素分岔角相比,埋深、平均侧压力系数、围岩强度对深部巷道交岔点的影响是显著的,而岩体强度则是影响深部巷道交岔点稳定性的最主要的因素,并以此得出了深部巷道设计的最佳地质和结构参数.

Considering the problems existing in the design,support,and stability control of soft rock laneway in deep mines,we numerically simulated the effect of geological and structural factors such as level stress angle,lateral pressure coefficient,rock mass strength,and fork angle on wall rock deformation and stability at the laneway intersection.The results show that,compared with the fork angle,the mining depth,lateral pressure coefficient,rock mass strength are remarkable influencing factors while the rock mass strength is the most important factor.The optimal geological and structural parameters for designing laneway are determined.