摘要
为提高尾矿坝的安全性和稳定性,对某锰矿尾矿坝岩土工程勘察与稳定性评价技术进行研究。采用地质钻机获取深层地质信息,建立锰矿尾矿坝剖面概化模型,并运用多种稳定性评价方法进行分析。通过勘探线动态调整、土样采集和注浆加固等技术手段,对尾矿坝的岩土稳定性进行了全面评估。实验结果表明,结合强度折减法和Newmark法的综合评价方法在安全系数和临界加速度方面表现最佳,而研究所提出的方法在实地观测符合度上达到了95%,安全系数为1.55,临界加速度为0.21 g,最大永久位移为9 cm,显示出较高的准确性和实用性。未来工作还需考虑降雨、渗流等其他影响因素,以进一步完善尾矿坝稳定性评价技术。
To enhance the safety and stability of tailings dams,this study conducted the geotechnical investigation and stability evaluation technology of a manganese tailings dam.Deep geological information was obtained using geological drilling rigs,a generalized profile model of the manganese tailings dam was established,and various stability evaluation methods were applied for analysis.Through dynamic adjustment of exploration lines,soil sampling,and grouting reinforcement,a comprehensive assessment of the geotechnical stability of the tailings dam was conducted.The experimental results show that the integrated evaluation method combining the strength reduction method and Newmark’s method performed best in terms of safety factor and critical acceleration,while the method proposed by the research achieved a 95%correspondence with field observations,with a safety factor of 1.55,a critical acceleration of 0.21 g,and a maximum permanent displacement of 9 cm,demonstrating high accuracy and practicality.Future work should also consider other influencing factors such as rainfall,and seepage to further improve the stability evaluation technology of tailings dams.
作者
马国辉
李莹
MA Guohui;LI Ying(Xi’an Engineering Investigation and Design Research Institute of China National Nonferrous Metals Industry Co.,Ltd.,Xi’an,Shaanxi 710054,China)
出处
《中国锰业》
2024年第5期26-30,共5页
China Manganese Industry
关键词
锰矿尾矿
工程勘察
稳定性评价
NEWMARK
Manganese tailings
Engineering investigation
Stability evaluation
Newmark’s method
