摘要
以厂坝铅锌矿露天采场岩质高陡边坡为研究背景,通过岩体参数设计变量的正交试验组合,采用回归分析中的最小二乘法,建立了边坡计算位移与岩体参数之间的函数关系,并利用现场监测信息,以实测位移与计算位移之差的平方和达到最小作为优化目标,由此确定了对应于监测位移的现状边坡的等效岩体参数。在此基础上,运用数值模拟方法对高陡边坡进行了干、降雨状态下的稳定性研究,得出了与现状边坡的稳定状态较为吻合的研究结果;而且结果显示,降雨渗流对边坡的稳定性影响敏感,为控制边坡稳定性的重要因素。此研究方法为不同开采工况下岩质高陡边坡的稳定性动态预测提供了基础。
With the high and steep rock slope of open pit in Changba Pb-Zn Mine as the background,and on the basis of the orthogonal experiments on the design variables of rock parameters,the functional relationship between the parameters of the rock mass and the calculated displacements of the slope was established through the regression analysis by using the method of least squares. Then,taking the minimum sum of squares of difference between the measured displacement and the calculated displacement as the optimal goal,the equivalent parameter of rock slope corresponds to the status of monitoring phase was determined by the means of on-site monitoring information. On this basis,the research on high and steep slope stability in the state of dry and rainfall conditions were carried out respectively by numerical simulation method,obtaining that the result conformed to the current slope condition. The results showed that the slope stability is sensitive to rainfall infiltration that becomes the main controlling factor of the slope stability. This research approach provides the basis for the dynamic prediction of high and steep rock slope stability in different mining conditions.
出处
《金属矿山》
CAS
北大核心
2014年第12期30-34,共5页
Metal Mine
基金
长江学者和创新团队发展计划项目(编号:IRT0950)
国家重点基础研究发展计划(973计划)项目(编号:2010CB731500)
关键词
岩体等效模型
高陡边坡
正交试验
回归分析
数值模拟
Equivalent model of rock mass
High and steep slope
Orthogonal experiment
Regression analysis
Numerical simulation
