基于Geo-Studio的露天采场边坡稳定性研究

Slope Stability of Open-Pit Based on Geo-Studio

以卓成矿业石港矿区为工程背景,通过现场勘察和开采现状图选取最典型的边坡剖面,采用模拟软件Geo-Studio中的HH-Slope/W专业模块对边坡剖面进行极限平衡分析,得出了2个典型剖面在正常采动、爆破振动和爆破振动+地震力耦合作用等3种不同工况下的最危险滑移面位置和边坡安全系数。研究结果表明:(1)当东、西分区采场边帮采用Morgensern-price法计算时,在爆破振动和地震力耦合作用下安全系数分别为1.217和1.078,符合规范要求,边坡稳定性较高,且前者计算的安全系数比后者稍大;(2)随着工况荷载的增大,危险滑移面表现出向深部扩展的行为,稳定性逐步向临界失稳状态扩展。

This paper takes Shigang mining area of Zhuocheng Mining as the engineering background.Through the site investigation and mining status diagramselects,the most typical slope section is selected.The HH-Slope/W professional module in the simulation software Geo Studio is used to conduct limit equilibrium analysis on the slope section,the most dangerous slip plane positions and slope safety factors were obtained for two typical profiles under three different working conditions:normal mining,blasting vibration,and blasting vibration+seismic force coupling.The results show that:(1)When the Morgensen price method is used to calculate the side slopes of the eastern and western mining areas,the safety factors under the coupling of blasting vibration and seismic force are 1.217 and 1.078,respectively,which meet the requirements of the specifications.The slope stability is relatively high,and the safety factor calculated by the former is slightly larger than that of the latter;(2)As the load of the working condition increases,the dangerous plane exhibits a behavior of expanding towards the deeper part,and the stability gradually extends towards the critical instability state.