高陡矿山边坡山稳定性动态分析及其工程应用研究

露天开采形成的矿山边坡岩体的力学特性和稳定状态具有显著的动态特征,因此,传统的确定性分析方法难以获得可靠的稳定性分析结果。本文结合边坡岩体的变形监测信息,提出了矿山边坡稳定性动态分析技术。首先在边坡坡面布设一定数量的变形监测点,进行边坡变形监测。根据矿山实际开采情况(坡高、坡角和地质构造),建立对应于当前开采状况的数值分析模型,并基于监测位移与计算位移之差最小为准则,进行等效边坡岩体参数的模式识别。最后进行当前边坡的稳定性评价或未来开采解决的稳定性预测。实例研究结果显示,该分析技术能够获得与实际边坡稳定状态较为吻合的结果,为高陡矿山边坡的稳定性分析和安全评价提供一种新的研究方法。

DYNAMIC ANALYSIS METHOD OF STABILITY OF MINING SLOPES OF HIGH AND STEEP AND ITS APPLICATION IN A SLOPE ENGINEERING

Because mechanics character of slope rock mass and stability condition in opencast mine have obvious dynamic character, so it is very difficult to got reliable analysis results by tradition method. Therefore, according to the information of deformation monitoring of slope rock mass in this paper, the technique of slope stability analysis was put forward. In order to analyze dynamically slope stability, some deformation monitoring dots were firstly laid on the slope face. Then, the numeric analysis model which corresponding current exploit status was established based on fact exploit status of the Mine (height, angle and geological structure).and the equivalence parameters model of slope rock mass was identified, based on the least criterion of the difference between monitoring displacements and computation displacements. At last, the appraisement of current slope stability and the forecasting of futurity exploiting slope stability were discussed through analyze equivalent parameters. The applied research of the north side A-A cross section slope of Changba opencast mine was carried through based on the analysis technique which is put forward in this paper. The research results show that the technique can get close results with fact slope stability condition, and can provide a new analysis method for the stability analysis and safety appraisement of high and steep mine slope.