地震荷载作用下露天矿外排土场扩容边坡稳定性分析  

Stability analysis of slope of external dump expansion in an open-pit mine under seismic loading

作　　者：陈德付 CHEN Defu(Xinjiang Tianchi Energy Co.,Ltd.,Changji 831100,China)

机构地区：[1]新疆天池能源有限责任公司,新疆昌吉831100

出　　处：《露天采矿技术》2023年第4期104-107,共4页Opencast Mining Technology

摘　　要：基于新疆天池能源南露天矿提高矿区生产水平、提高排土场容积的现状,需要对外排土场进行增高扩容;探讨了扩容方案和扩容后地震荷载下的边坡稳定性。采用了基地承载能力分析和Geo-Slope、Geo-Quake/W数值模拟分析,研究了扩容方案和扩容后地震荷载下边坡稳定性。结果表明:现况外排土场边坡稳定,存在增高扩容的可能性;设计增高扩容方案为排土台阶高度为20 m,共5个台阶,设置平台宽度为30 m,单台阶坡面角为33°,总体排弃高度增加至100 m,地震参数下扩容后的边坡稳定性满足设计规范要求,设计方案满足设计要求且可以增加外排容量,提高产能。Based on the current situation of Xinjiang Tianchi Energy South Open-pit Mine to improve the production level of the mine and increase the volume of the dump,it is necessary to increase the height and expand the capacity of the external dump.The article discusses expansion plan and slope stability under seismic load after expansion,uses the base bearing capacity analysis and Geo-Slope and Geo-Quake/W numerical simulations to study the expansion plan and slope stability under seismic load after the expansion.The results show that the slope of the existing external dump is stable,and there is a possibility of increasing the height and expanding the capacity.The design plan of increasing the height and expanding the capacity is to set the height of the discharge steps at 20 m,with a total of 5 steps,set the width of the platform at 30 m,the slope angle of the single step at 33°,and increase the overall discharge height to 100 m.The stability of the slope after expansion under seismic parameters meets the requirements of the design specification.The design plan meets the design requirements and can increase the external discharge capacity and increase the capacity.

关 键 词：边坡稳定性 增高扩容 数值模拟 地震荷载 极限平衡法 

分 类 号：TD824.7[矿业工程—煤矿开采]