摘要
针对目前高寒高海拔矿区露天边坡单台阶平面破坏分析的不足,以安全系数为特征指标,利用极限平衡法对边坡平面破坏进行定量分析,基于2种工况进行计算。结合岩体结构控制论,分析西藏知不拉多金属矿露天采剥工程在张裂隙及地震作用下边坡破坏模式及滑坡机理,并通过SLIDE软件建立三维边坡模型,计算边坡安全系数。研究结果表明:断层影响区的三维滑坡模式为沿弱层面、断层面及侧界面的楔体滑动,说明了三维滑体的危险空间形态;通过计算不同侧界面位置下的安全系数,得出张裂隙及地震对边坡的影响范围;根据稳定性分析结果,提出的控制开采方案可为高寒高海拔地区露天矿边坡防治提供技术指导。
In view of the lack of analysis studies on the plane failure of single step of open-pit slope in alpine and high-altitude mining areas,this paper takes safety factor as the characteristic index,uses limit equilibrium method to quantitatively analyze the plane failure of slope,and calculates based on two working conditions.Combined with rock mass structure cybernetics,this paper analyzes the slope failure mode and landslide mechanism of Xizang Zhiboladuo metal mine under the action of tensile cracks and earthquake,and establishes a three-dimensional slope model by SLIDE software to calculate the slope safety factor.The calculation results show that the 3 D landslide mode in the fault-affected area is wedge sliding along the weak plane,fault plane and lateral interface,which indicates the dangerous spatial morphology of 3 D sliding body.By calculating the safety coefficient at different interface positions,the influence range of tensile cracks and earthquake on the slope is obtained.According to the stability analysis results,the proposed control mining scheme can provide technical guidance for slope prevention and treatment of open-pit mine in alpine and high altitude areas.
作者
张晴
ZHANG Qing(School of Safety and Engineering,Xi’an University of Science and Technology,Xi’an Shaanxi 710054,China;China Academy of Safety Science and Technology,Beijing 100012,China)
出处
《中国安全生产科学技术》
CAS
CSCD
北大核心
2022年第S01期48-54,共7页
Journal of Safety Science and Technology
基金
国家重点研发计划项目(2021YFC3001905)
中国安全生产科学研究院基本科研业务费专项资金项目(2022JBKY16)
关键词
边坡稳定性
张裂隙
地震
破坏模式
三维滑体
slope stability
tension crack
earthquake
failure mode
three dimensional sliding body
