深井软岩巷道围岩变形特征及支护参数的确定

根据马路坪矿巷道围岩主要物理、力学性质的实验室测试以及现场围岩变形的监测结果，探讨了深部软岩巷道围岩变形破坏特征.借助FLAC^3D进行数值模拟计算，分析了巷道开挖后和原支护形式下围岩破碎区、塑性区范围和应力位移分布状况；并通过数值模拟优化了支护参数，确定了二次支护时间，提出了用短锚杆或铆钉取代管缝式锚杆挂网、采用底角锚杆对巷道底板进行加固的技术方案.工业试验结果表明，该方案对深部巷道围岩变形的控制效果良好.

Surrounding rock deformation properties and determination of support parameters of soft rock roadway in deep mine

Based on the laboratory test of the main physical and mechanical characteristics and the measured results of the deformation of the surrounding rock around roadway in Maluping Mine,the deformation and destruction properties of the surrounding rock in deep soft rock roadway were discussed.Through numerical modeling with FLAC3D,the ranges of the fragmentation area and the plastic area,the stresses distribution and strains of the surrounding rock around roadway in the original support state were analyzed.The support paramerters of new scheme were optimized by numerical modeling.The second support time was determined.The technic scheme that tube-like bolt can be substituted for short bolt or rivet and corner bolt reinforcement were put forward.The industrial test results show that good effects to controll the deformation of the surrounding rock in deep roadway are obtained with the scheme.