齐大山铁矿露天边坡岩体力学参数确定

Determination of mechanical parameters of rock mass from Qidashan iron mine open-pit slope

为分析齐大山铁矿东帮局部边坡稳定性,需获取边坡岩体力学参数。通过室内岩石力学试验得到3种岩性自然及饱水条件下的单轴抗压强度和抗剪强度,自然条件下的抗拉强度、弹性模量以及泊松比。综合Hoek-Brown法、费森科法及经验折减法对测得的边坡岩石力学参数进行折减,得出合理、准确的岩体力学参数。

In order to analyze the local slope stability of the east side of the Qidashan iron mine,it is necessary to obtain the mechanical parameters of the slope rock mass.Therefore,three kinds of lithological uniaxial compressive strength and shear strength under natural and saturated water conditions,tensile strength,elastic modulus and Poisson’s ratio under natural conditions were obtained through indoor rock mechanics tests.Combined with Hoek-Brown method,Г.ΦИCEHKO method and empirical reduction method,the measured rock slope mechanical parameters were reduced to obtain reasonable and accurate rock mass mechanical parameters.