摘要
以上游式尾矿库回采的坝坡稳定性为研究对象,结合了34个工程钻孔开展了岩土体物理力学实验,完成了尾矿回采利用坝坡的动态稳定性研究。研究结果表明:由于回采过程中尾矿坝高度降低,坝体所受的横向及竖向荷载降低,坝体圆弧滑动区域下移,坝体安全系数逐渐增大;尾矿回采导致库岸边坡临空面加大、应力释放,饱和的强风化基岩再次揭露,库岸边坡安全系数随回采工程的进行逐渐减小。下一步研究应重点考虑尾矿回采下降速度、浸润线控制、固结排水及库岸位移监测等影响因素。
The dam and slope stability of upstream tailings pond utilization was taken as the research object,and 34 engineering boreholes were combined to carry out physical and mechanical experiments of rock and soil mass,and the variational stability of dam and slope of tailings utilization was studied.The results show that the height of the tailings dam decreases,the lateral and vertical loads on the dam decrease,the arc sliding area of the dam body moves down,and the safety factor of the dam gradually increases.Tailings utilization leads to the increase of the free face of the slope,the release of stress and the exposure of saturated strongly weathered bedrock,the safety factor of the bank slope of tailings gradually decreases with the progress of tailings utilization.The next research should focus on the factors such as tailings decline rate,infiltration line control,consolidation and slope displacement monitoring.
作者
周罕
付俊
陈永贵
余璨
张丹丹
ZHOU Han;FU Jun;CHEN Yonggui;YU Can;ZHANG Dandan(Kuming Prospecting Design Institute of China Nonferrous Metals Insdustry Co.,Ltd.,Kunming 650051,China;Yunnan Key Laboratory of Geotechnical Engineering and Geohazards,Kunming 650051,China;College of Civil Engineering,Tongji University,Shanghai 200092,China)
出处
《金属矿山》
CAS
北大核心
2023年第4期199-202,共4页
Metal Mine
基金
云南省科技厅省重点实验室科技计划项目(编号:科技人才与平台计划202105AG070006)
云南省万人计划产业技术领军人才科技项目(编号:云发改人事[2019]274号)
中国有色金属工业昆明勘察设计研究院有限公司科技创新项目(编号:2019YN01,2019FGW01)。
关键词
上游式尾矿
尾矿回采
坝坡动态稳定性
安全系数
upstream tailings
tailings pond utilization
variational stability of dam and slope
safety factor
