某大型露天矿合理边坡角设计及稳定性分析  

Design for Reasonable Slope Angle in the Large Surface Mine and the Stability Analysis

作　　者：王曰国[1] 王星华[1] 林杭[2] 

机构地区：[1]中南大学土木建筑学院,长沙410075 [2]中南大学资源与安全工程学院,长沙410083

出　　处：《工程勘察》2007年第12期1-5,共5页Geotechnical Investigation & Surveying

基　　金：湖南省建设厅资助项目(200407);湖南省建设厅重点项目(04SK2008)

摘　　要：为了对某露天矿进行相应的台阶边坡角设计和边坡稳定性分析。首先,利用简化Bishop法进行极限平衡法分析,结果表明:台阶开挖角为65°的情况下,安全系数为1.484,边坡稳定性和经济性达到较好组合。然后,利用FLAC3D,计算边坡在台阶开挖角65°情况下的安全系数和破坏模式,结果表明:开挖完毕后,边坡处于稳定状态,其潜在滑坡为局部破坏,安全系数为1.58,与极限平衡法得到的结果相差不大(相对误差6.47%),而极限平衡法计算偏于安全。In order to study the slope angle and slope stability for certain surface mine, the limit equilibrium analysis is done by the simplified Bishop method. The calculation results show that the safety factor is 1.484 under the condition of the excavation step angle 65°, in which situation the combination of the slope stability and the economical effect reaches the optimum magnitude. The numerical analysis model is founded by the three-dimen- sional FLAC. The numerical calculations are analyzed for the safety factor and failure mode of the slope in the same condition. The results show that the slope is in the stable state after excavations, the potential slide is under the local failure mode, and the safety factor of the slope is 1.58, The result obtained by numerical calculation is a little different in the amount of 6.47% from that obtained by the limit equilibrium method, but the calculations obtained from the limit equilibrium method are more safety.

关 键 词：边坡 露天矿 极限平衡法 数值分析 安全系数 

分 类 号：TU353.6[建筑科学—结构工程]