基于离散元的边坡稳定性模拟研究

Simulation Study of Slope Stability Based on Discrete Element

云南磷化集团下属的尖山磷矿坡顶出现裂缝后,采取了包括停产、封堵处理裂缝、加强坡顶的巡回观测等一系列措施,避免了裂缝的进一步发展和恶化,对边坡的暂时稳定性起到积极的作用。但在对该矿山稳定性的判断上由于监测数据不足,存在一定的误区。以云南磷化集团矿山重大事故隐患辨识和危险性评价研究为依托,采用离散元对边坡稳定性进行了模拟,模拟结果表明,在现状条件下(边坡长200 m),如果出现裂缝的区域全部滑落,则大约滑落量为95万m3,严重影响到采场采剥作业的人生及设备安全。经方案比较,局部放缓成本较低,可降低相关风险。

After the cracks observed at phosphate rock slope in Eagle 's Nest affiliated to Yunnan Phosphate Group,a series of effective measures,including shutdown,blocking cracks and increasing observation frequency,were conducted to avoid the further cracks deterioration,and played a positive role in maintaining temporary stability. However,there were some errors in judgment of the mine stability due to lacking of observed data. Therefore,a simulation study of slope stability based on discrete element was implement in this paper,which was also supported by a major accident hazard identification and risk evaluation of mine in Yunnan Phosphate Group. The simulation results showed that in the slight of current conditions( slope length 200 m),the slide amount would be about 950 000 m3. If all the cracked area slid down,the safety of human and equipment in mining section would be seriously affected. Comparing different designs,partially slowdown the slope should reduce costs and risks.