The Dynamic Evaluation Of Mine Slope Safety Based On The Measured Data

With the development of economy and society, the demand for mineral resources is becoming more and more larger. Because of the high production efficiency and low production cost, now, open-pit mining is widely used in mining explorations. The slope is an important part of this process and the security of it is directly related to the safety of the entire open mine, and because of the special nature of mining, once the slope is unsafe, it will cause great danger to life and property thus ensuring the safety of mine slope is an important work in the process of open-pit mining. Currently, most open-pit mine has established satety monitoring system to keep timely access to information such as the displacement of slope, groundwater, rainfall and so on, By analyzing these data, the safety of the slope can be judged.Many factors affect the safety of the mine slope.By the current technology, it is difficult to accurately obtain all the information of the slope movement and development. The limited awareness and interference by fake information lead to the incompletion of the monitoring information, that is, the existence of gray; Meanwhile, due to the anisotropism of rock and the inaccuracy of monitoring equipment itself, the resulting monitoring information also has a certain degree of ambiguity. In view of this, we have established the gray fuzzy comprehensive evaluation model based on fuzzy mathematics and gray system theory to judge the safety of the slope. This model is based on the gray clustering theory, and combines the combination weighting method in fuzzy mathematics to carry on weights calculation, and at the same time improves the center TWW function to make it more suitable for the actual condition in slope engineering.In order to satisfy the dynamic evaluation of slope safety, this paper use the improved grey GM (1,1) prediction model to predict the displacement information of the slope, and put the forecast information in different times into the the evaluation model with consideration of safety under different rainfall conditions. In this way, the dynamic evaluation can be obtained as a result.The above evaluation process establish example analysis on the foundation of the monitoring data during the operation of open pit mine slope. The analysis indicates that the evaluating model is a reasonable, practical and feasible method, and the results reflect reliably the dynamic security state of mine slope.