凤山县城区石灰岩矿山岩壁阴刻角优化设计

根据岩质边坡的岩体结构特点,概化出岩质高边坡阴刻角优化模型,建立基于极限平衡计算最优阴刻角的方法。将这种方法运用于广西凤山县城区石灰岩矿山高边坡治理的实践中,为其阴刻角设计提供依据。通过岩体类型和岩体结构对岩壁阴刻影响定性定量的分析;并采用三维数值模拟分析了阴刻深度对岩壁稳定性影响,给出了治理工程的理论阴刻深度为2 m,从而确定了阴刻角设计的影响因子,分别是发育节理的产状、黏聚力和摩擦角、块体的重度、边坡坡角和阴刻深度。根据极限平衡原理,建立了阴刻岩壁块体的极限平衡计算模型;并进行阴刻角的优化计算,最终确定最优阴刻角为53.8°,运用到治理设计中;同时该实例也充分证明了该计算模型作为一种计算最优阴刻角简便途径的有效性和实用性。

The Intaglio Angle Optimization Design of Limestone Mine in Fengshan

According to the structural characteristics of rock mass, optimization model of intaglio angle is summarized on high rocky slope, and the calculation method of optimum intaglio angle on high rocky slope is established based on the limit equilibrium method. This method has been applied in limestone mine of high slope governance practice in Fengshan Guangxi, for providing the basis of its intaglio Angle design. Through the qualitative and quantitative analysis of theStypesSof engineeringSrock massSand the rock mass structure on the influence of rock intaglio, and using the three-dimensional numerical simulation analysis the intaglio depth on the influence of stability of rock. In result, It gives this governance engineering theory of intaglio depth, It is 2m, determining the impact factors of intaglio Angle design, which are joint orientations, cohesive force, internal friction angle, the destructive rock mass of weight, slope angle and the depth of intaglio. Based on the principle of limit equilibrium, the limit equilibrium calculation model of rock intaglio mass is established, and the optimal intaglio angle is calculated, finally the optimal intaglio angle is 53.8°. At the same time, this instance is fully proved this calculation model as a simple effective and feasible means of calculating the optimal intaglio angle.