厄瓜多尔米拉多铜矿南排土场稳定性分析

Stability analysis of south dump of Mirador Copper Mine in Ecuador

为研究米拉多铜矿南排土场稳定性,考虑动载荷、水文条件的影响,确定了排土场安全等级和不同工况下的最小安全系数,采用简化Bishop法计算3个工况下排土场5个剖面的稳定性系数。结果表明:排土场在自然、降雨和地震工况条件下的最小安全系数下限为1.25、1.20和1.15;A-A’、C-C’、E-E’剖面稳定系数在地震工况下均不能满足要求,需采取有效措施来保证排土场稳定性要求。

To study the stability of the south dump of Mirador Copper Mine, considering the influence of dynamic load and hydrological conditions, the article determines the safety level of dump and the minimum safety factor under different working conditions. The article uses Bishop’s simplified method to calculate the stability coefficients of five sections under three different conditions. The results show that the lower limits of the minimum safety factor are 1.25, 1.20, and 1.15 under natural conditions,rainfall conditions, and earthquake conditions. The safety factors of A-A ’, C-C’ and E-E’ profiles cannot meet the requirements under seismic conditions, so effective measures should be taken to ensure the stability of the dump.