| Among mineral resources development in china, open pit mining accounts for a large proportion. According to statistics of2011, there are55172non-coal open pit mine, which accounted for88.24%of the mining industry. With the deepening of open pit mining, slope stability problems seriously restrict the normal production of open pit mining. Strong tectonic activity constitutes the slope engineering of complex geological conditions, formed has temporal and spatial variability complex geological body, therefore, how to accurately evaluate the stability of the high and steep slope is very difficult.in support of spatial analysis functions overlap of GIS technology and the establishment of a suitable evaluation model based on fuzzy matter-element theory, the boundary slope stability of entire Zijinshan Gold-copper Mine were evaluated. Obtained results are as follows:Based on the theory of fuzzy mathematics and physical element analysis, fuzzy matter-element model was constructed. The model considered ubiquitous fuzzy uncertainty and contradiction between evaluations of single factor in slope engineering contradictions.Utilized in the evaluation process fuzzy matter-element summation normalization method that weights can be obtained directly without separate calculation is very simple and convenient.This paper attempted to use fuzzy matter-element model in rock integrity evaluation of Zijinshan Gold-copper Mine, and the mechanical parameters of rock mass reduction was based on the integrity evaluation results. This method took into account the characteristics of joints and other internal factors that affect the integrity of the rock, to some extent, reduced the impact of human factors, which was a new exploration in the study of rock mechanics parameters.On the basis of the already established raster layer on the properties of each factor, to get through the grid data management tools, according to the summation normalization method, through appropriate deformation, the weight value of each evaluation factor was calculated. This method of seeking weight in GIS partition evaluation was a new attempt, and the advantage was obvious.Based on GIS a fuzzy partition stability evaluation system was established of Zijinshan Gold-copper Mine. Based on GIS technology of spatial analysis superimposed layers, using the fuzzy matter-element model its regional stability evaluation result was obtained. This paper obtained a zoning map of slope stability of open pit mining area of Zijinshan Gold-copper Mine, through grid superimposed analyzes. The evaluation results showed that the study area was divided into five stable levels:very stable, basically stable, generally stable, unstable, very unstable, and the proportion of each part was respectively8.9%,18.5%,38.2%,19.2%,8.9%.When comparing with the actual situation, suggesting that the fuzzy matter-element evaluation model has a better reliability and practicality.Considering the unstable area mainly concentrated in the open pit slope in western and eastern, more concentrated distribution, respectively in the two regions to select a typical section of the numerical simulation analysis and calculation, quantitatively express the typical profile of a steady state and the state of stress and strain, the analysis results show that the whole slope stability is better, show that reasonable slope design. |
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