某露天矿山破碎岩体高陡岩质边坡稳定性的数值模拟研究

露天矿山高陡岩质边坡的稳定性严重威胁着矿山的安全生产，尤其是对于地质条件复杂、地层分布不均匀且节理裂隙发育的变质岩和侵入岩形成的破碎带发育的边坡更是如此。为确保某矿山的安全生产，通过力学试验的方法确定了岩石的物理力学性质，通过Hoek-Brown强度准则将岩石的力学性质转化为岩体的力学性质并对岩体的质量进行了评价。同时，采用FLAC3D数值模拟技术将高陡岩质边坡进行数值研究。结果表明：终了边坡的安全系数为1.31,边坡总体上处于稳定状态，但是通过对边坡中部的最大主应力分析可知，边坡中部随着开采的进行，可能存在冒落、垮塌或滑坡的风险，针对边坡存在的风险提出了预防措施。研究为矿山的安全生产提供了科学指导，同时为相似矿山的边坡处理提供了科学依据。

Numerical simulation study on the stability of high and steep rock slope with broken rock mass in an open pit mine

The stability of high and steep rock slope in open-pit mine seriously threatens the safety production of the mine. Especially for the slope developed in the fracture zone formed by metamorphic rock and intrusive rock with complex geological conditions, uneven stratigraphic distribution, and developed joints and fissures. To ensure the safe production of a mine, the physical and mechanical properties of the rock in the mine are determined by mechanical tests. The mechanical properties of the rock are transformed into the mechanical properties of the rock mass by Hoek Brown strength criterion, and the quality of the rock mass is evaluated. At the same time, the high and steep rock slope of the mine is numerically studied by FLAC3D numerical simulation technology. The research results show that the safety factor of the end slope of the mine is 1.31, and the slope is generally in a stable state. However, through the analysis of the maximum principal stress in the middle of the slope, it can be seen that the risk of caving, collapse, or landslide may exist in the middle of the slope with the progress of mining, In view of the risk of the slope, the preventive measures are put forward in this paper. This study provides scientific guidance for the safe production of the open-pit mine and provides a scientific basis for the slope treatment of similar mines.