大型露天矿山地质灾害危险性评估

Risk assessment of geological hazards in large open-pit mines

地质灾害潜在的危险性会严重威胁矿山开采的安全性,为了降低大型露天矿山地质灾害的危险性,提出了大型露天矿山地质灾害危险性评估研究。以矿山为研究对象,根据矿区形态分析了大型露天矿山的地质构造,考虑到研究区地质环境的复杂特征,确定了评估区的范围。结果表明,大型露天矿山库岸边坡稳定性分别为尾矿库左岸和尾矿库右(南)岸的稳定性较差,尾矿库右(东)岸的稳定性好,尾矿库右岸形成一段高1~3 m、长1500 m的切坡,由于切坡的崩塌规模和高度都比较小,对大型露天矿山的库岸边坡稳定性不会产生太大的影响,坝基和左坝肩的稳定性较好,右坝肩由于受到强烈的岩石风化,稳定性较差。

The potential danger of geological disasters will verify the safety of mining operations.In order to reduce the risk of geological disasters in large-scale open-pit mines,a study on the risk assessment of geological disasters in large-scale open-pit mines is proposed.Taking the mine as the research object,the geological structure of the large open-pit mine is analyzed according to the mining area shape.Considering the complex characteristics of the geological environment in the study area,the scope of the assessment area is determined.The results show that the stability of the reservoir bank slope of large open-pit mines is poor in the left bank and the right(south)Bank of the tailings pond,while the stability on the right(east)bank of the tailings pond is good.The right bank of the tailings pond forms a section of 1500 m high cut slope from 1 m to 3 m.Due to the small collapse scale and height of the cut slope,it will not have a great impact on the stability of the reservoir bank slope of large open-pit mines,and the stability of the dam foundation and left dam abutment is good,the right dam abutment has poor stability due to strong rock weathering.