中文摘要：

为解决露天采场边坡失稳带来的巨大安全隐患问题,以鞍本地区铁矿露天采场为例,在分析高密度电阻率法基本原理、探测系统和正反演原理的基础上,测定了研究区内主要岩矿体电阻率,据此建立了基于地电场数值模拟的层间软弱层稳定性评价模型。温纳和偶极装置工作下,设定的地电模型正演模拟和反演计算结果表明,电阻率异常特征准确地反映了软弱层的稳定性状态,地电场分布特征与模型设定结果基本吻合。评价实例和钻探验证结果表明,模型可准确评价层间软弱层的稳定状态,取得了良好的实际效果。

英文摘要：

This paper intends to solve the hidden risks in the open pit of the iron mine likely to be caused by the presence of the weak interlayers in the slope rock mass,which may result in a slope failure and lead to serious dangerous security problems. It is just for this reason that we would like to make a discussion of the methods on how to evaluate the stability of the weak interlayers by taking an open iron mine in Anshan-Benxi area as a case sample. On the basis of the analysis of the basic principles of the geo-electric field theory,the detection system of the high-density resistivity method and the progressive and retrogressive theory,we have determined the electric resistivity values of the main rocks and ores in the area under study by using the small quadrupole method. According to the spatial relationship and the electrical feature of the said ore,the supporting wall rock and the weak interlayers,we have developed a model based on the numerical simulation of the geo-electric field in evaluating the stability of such weak interlayers in the side slope. The model we have developed can be used to work with the winner and dipole devices. The calculation results gained by using the said progressive and retrogressive model show that the geo-electric features of the weak layer tend to function quite differently in a stable state and unstable state. The abnormal region in the resistivity based on the results of geo-electric field numerical simulation proves to be consistent with the region settled likely in the geo-electric models,reflecting the electrical features of such weak layers in different states accurately. Thus,it can be concluded that the stability of the weak layers tends to be in accord with their resistivity features. And,in turn,the above models we have worked out in evaluating the stability of slope inter-layers in one open pit of iron mine in the Anshan-Benxi area proves of great practical and common value. What is more,the drilling practice verification has also demonstrated that the above models ca