摘要
在详细工勘的基础上,为了得到庙冲尾矿坝坝体稳定性的可靠度,根据摩尔库仑准则,采用有限元分析软件计算出坝体的浸润线高度,在此条件下,考虑到岩体力学参数内摩擦角、密度和粘聚力的随机性,利用毕肖普法计算出坝体在各组力学参数下的坝体安全系数,并采用二次多项式序列响应面法计算坝体的稳定性可靠度,结果证明:采用二次多项式序列响应面法能够准确计算出坝体稳定性的可靠度,庙冲尾矿库稳定性可靠度为β=2.04,失效概率P_f=0.02,即在岩体力学参数变动范围内坝体不会破坏。
In order to get the stability reliability of Miaochong tailings dam,on the basis of detailed survey work,the finite element analysis software was adopt to calculate the height of the saturation line according to the Mohr-Coulomb criterion,and on this condition,considering the randomness of the friction angle,density and cohesion,and taking advantage of Bishop method to calculate the safety factor in different group of mechanical parameters,the stability reliability was calculated by two sequential response surface method.The results showed that using two sequential response surface method can accurately calculate the reliability of the dam stability,and the stability reliability of Miaochong tailings dam is β= 2.04,failure probability P_f= 0.02,which indicated that the dam will not failure within the change scope of rock mechanics parameters.
出处
《中国矿山工程》
2015年第1期28-31,共4页
China Mine Engineering
