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基于统一强度理论,考虑中间主应力效应和强度准则差异的影响,采用拟静力惯性力法、刚体极限平衡法和瑞典圆弧法,推导侵爆荷载作用下岩质边坡动力稳定系数的表达式,研究不同工况下岩质边坡的动力稳定性能,计算边坡滑体的最大滑裂高度及边坡失稳工况下单位宽度最大滑塌量,分析不同参数对边坡动力稳定系数的影响特性。研究表明:该计算式包含了一系列基于不同强度准则的静力稳定系数和动力稳定系数,可以有效地预测侵爆荷载作用下岩质边坡的动力稳定系数、最大滑体高度及单宽最大滑塌量的上限值和下限值,具有较广泛的适用性;考虑中间主应力效应越多或选用考虑中间主应力效应越多的强度准则,边坡的动力稳定系数越大;爆心深度越深或炸药量越大,边坡的动力稳定系数则越小。
Based on the unified strength theory and considering the influence of the intermediate principal stress effect and the strength criterion difference, the dynamic stability coefficient of rock slope under the action of the implosion-detonating load is deduced by quasi-static inertial force method, rigid body limit equilibrium method and Swedish arc method The dynamic stability of rock slope under different working conditions is studied. The maximum slip height of slope body and the maximum unit slip width of slope under slope failure condition are calculated, and the influence of different parameters on slope dynamic stability coefficient Impact characteristics. The results show that the formula contains a series of static stability coefficients and dynamic stability coefficients based on different strength criteria, which can effectively predict the dynamic stability coefficient, the maximum slide height and the maximum single width The upper limit and the lower limit of the amount of landslide have a wide range of applicability. Considering the effect of intermediate principal stress or the strength criterion considering the effect of intermediate principal stress, the dynamic stability coefficient of slope is larger. The deeper or the greater the amount of explosives, the smaller the dynamic stability factor of the slope.