某铜矿地下开采侧帮可动块体稳定性分析

采用理论的方法分析了江西某铜矿地下开采进路侧帮的稳定性。首先提出了考虑地应力作用的可动块体的稳定性分析模型，然后根据力的平衡原理，建立了主应力及岩体结构面倾向、倾角的关系公式，并得到了可动块体抗滑力表达式。在此基础上，建立了块体沿双面滑动时的稳定性系数的表达式，计算结果显示：块体的稳定性系数值随着最大水平应力方向与回采进路方向夹角的增大而逐步减小，当最大水平应力方向与进路方向相同时，则块体的稳定性系数值增大。最大水平应力对块体稳定性的影响，主要与其应力值的大小和块体结构面产状有关。

Stability Analysis of Movable Block at Lateral Wall of Underground Mining in a Copper Mine

The lateral wall stability of underground mining in a copper mine in Jiangxi province was analyzed in theory.Firstly，the stability analysis model of movable blocks under crustal stress was proposed，then based on the principle of force balance，the relationship formula between the principal stress and the direction and angle of rock mass structural plane was established，and the sliding resistance equation of movable blocks was obtained.Based on this，the stability coefficient equation of blocks along the double sliding was established.The calculation results showed that the stability value of block decreases with the increasing of angle between maximum horizontal stress direction and stoping drift direction；When the maximum horizontal stress direction is the same as stoping approach direction，the stability value of block increases.The effect of the maximum horizontal stress on the stability of the block is in connection with the principal stress value and the occurrence of rock mass structural plane.