大冶露天矿岩体结构面分布及端帮稳定性分析

通过边坡工程地质测绘及节理调查分析,认为该矿扩帮区岩体结构面分布有明显规律,它服从本矿区域地质构造,用区域应力场可以得到明确的解释。 对该矿的端帮,即平面凹形边坡的稳定性用滑坡模型试验及有限元法进行了分析。同时,还初步探讨了一种新的计算方法—三维条柱法,用它可以计算复杂形态的边坡或滑体的稳定性,分析了滑体侧阻力效应及平面曲率对边坡稳定性影响。分析结果表明,平面曲率半径与边坡稳定系数的关系为F=a+b/(R_0/H_0),当R_0/H_0<2,而且滑面一般不通过坡脚,而是在其上部。

Cistribution of Discontinuities on Daye Iron Pit and Stability Analysis to Its End Slopes

Based on the field investigations and analysis of data obtained, it is evident that the distribution of discontinuities on this pit is considerably identified with the rigional geostructure distribution and may be explai -ned clearly with the geostructural pressure field on this rigion.The stability of the end Slopes, i.e.concave slopes has been analysed with modelling and by means of the finite element method in axial sym -metry system. A new method, called 3-D. column method,is proposed with which the stability of the potential failure body in arbitrary configr-ations may be analysed. With this 3-DC the end effect on the failure bod-has been analysed and the slope stability with a range of horizontal curvature radiuses have been calculated. Results obtained show the relationship between the slope safety and curvature radiuses is given by