排土场与爆破荷载共同作用下的露天矿边坡稳定性分析

目前排土场对露天矿边坡稳定性的影响和动力荷载对露天矿边坡稳定性的影响,大多是被分别研究的。这样做难以真实反映露天矿边坡实际受力状态。基于此,对排土场和爆破荷载共同作用下露天矿边坡稳定性进行研究。首先,通过室内试验确定岩体参数,分析露天矿边坡在排土场和自重情况下的变形特征,并以此为初始状态,采用Ansys/ls-dyna的隐式-显式分析功能,研究其在爆破荷载作用下的岩体的响应特征。其次,验证新疆某露天矿排土场距离设置是否满足开采要求。结果表明:该露天矿边坡未出现明显破坏特征,整体处于稳定状态,该排土场距离设计合理;研究结果与工程类比分析结论一致。

Stability Analysis for Open-pit Mine Slope under Waste Dump and Blasting Load

At present,in most cases,the effect of waste dump on open-pit mine slope stability and that of dynamic loads on the stability are studied respectively.The stressed state of open-pit mine slope can not be reflected to the full.In view of the situation,the combined action of waste dump and blasting load on the open-pit mine slope stability was studied.Firstly,the rock mass parameters were determined by laboratory test and the deformation feature under the combination of waste dump and gravity was analyzed.Response feature of rock mass to blasting load was researched by the implicit-explicit function of Ansys/ls-dyna,In addition,it was verified that the waste dump distance in a certain open-pit mine in Xinjiang could meet the need of mining open-pit mine.The results show that the slope is still in a stable state on the whole,the distance design of waste dump is reasonable.