某露天矿边坡岩体力学参数取值及对比分析

Comparison and Analysis of Mechanical Parameters of Slope Rock Mass in an Open-pit Mine

岩体力学参数的正确选取是边坡稳定性计算的关键和基础,直接影响稳定性计算结果的准确性。以某露天矿山为研究对象,在室内岩石力学试验数据的基础上,利用经验折减法、费辛柯法、M Georgi法和Hoek-Brown法获取岩体力学参数并进行对比分析。研究表明:针对某露天矿山,单独利用经验折减法等方法获得的岩体力学参数与实际不符;结合工程实践经验,对4种方法的计算结果进行综合平均取值,获得适用于某露天矿山的岩体力学参数,为进一步的边坡稳定性分析提供可靠的计算参数。

The correct selection of rock mass mechanical parameters is the key and basis for slope stability calculation,which directly affects the accuracy of stability calculation results.Taking an open-pit mine as the research object,on the basis of indoor rock mechanics test data,empirical reduction method,Fisinke method,M Georgi method and Hoek-Brown method are used to obtain rock mechanics parameters and carry out comparative analysis.The research shows that the mechanical parameters of rock mass ob⁃tained by using empirical reduction method alone for an open-pit mine are inconsistent with the actual situ⁃ation.Combined with the practical experience of engineering,the calculation results of the four methods are comprehensively averaged to obtain the mechanical parameters of rock mass suitable for this open-pit mine,which provides reliable calculation parameters for further slope stability analysis.