【摘要】 针对深埋巷道围岩普遍处于破裂状态的特点,采用非连续变形分析(DDA)软件对巷道围岩松动圈非连续体位移影响因素的变化规律进行了模拟研究.分析了用锚杆、锚索和注浆加固以增加围岩破裂面的黏结力、抗拉强度和内摩擦角的数值来减少位移量的机理,提出了非连续体巷道失稳破坏的判断标准,并对埋深1 159 m的大松动圈围岩巷道的非连续体位移进行了定量计算和实地观测.实测结果与DDA软件计算值比较吻合,说明对于深埋巷道破裂围岩采用DDA方法进行位移计算和支护参数设计是可行的.更多还原

【Abstract】 Aiming at the broken status of surrounding rocks of deep roadway,the changes of factors influencing the discontinuous displacement of the surrounding rock were studied using the software discontinuous deformation analysis(DDA).The mechanisms of reducing the displacement were analyzed using roof bolts,anchorage cable and grout for increasing the cohesion force,tensile strength,and internal friction angle of fracture planes.The criterion of judging drift failure of discontinuous roadway was proposed.The displacement of a roadway with the depth of 1 159 m was calculated and measured.The results show that the measured values accord well with the calculated values,which shows that it is feasible to calculate the displacement and design the support parameters of the surrounding rock by DDA method.更多还原