Safety Status And Analysis Of A Tailings Reservoir With Variable Weight AHP-fuzzy Comprehensive Evaluation

With the development of industrial economy,there are more and more tailings reservoirs built in China,and there are more and more problems.The most important problems are the large number of tailings ponds,small reservoirs,extensive production management and safe production measures.Not in place,and in the event of an accident in the tailings pond,it will cause economic losses and waste of resources for the country and the people.Therefore,it is of great significance to analyze and evaluate the disaster-causing mechanism leading to tailings reservoir accidents,so as to ensure the normal operation of the tailings pond.This paper obtains the disaster-causing mechanism of tailings reservoir accidents through various aspects of data collection,and analyzes the characteristics of each risk factor in detail,and establishes a risk index system for tailings pond dam failure.Secondly,the comprehensive safety evaluation of the tailings pond in Xiasha District of Pingjiang County is carried out.In the process of evaluation,the factors of the tailings pond dam break interact and interact with each other.By introducing the variable weight function,the variable weight AHP-fuzzy comprehensive risk is established.The evaluation model pays attention to the role of various factors and pays attention to the role between various factors,which is scientific.The main research work and conclusions of the thesis are as follows:(1)By reviewing the literature,norms and standards of a large number of tailings ponds,the risk index system of tailings pond dam break is established,and the risk of tailings pond is divided into five grades,and the corresponding score range is set for each grade.(2)In the calculation of index weights,through the variable weight theory,the variable weight function is introduced,combined with the fuzzy comprehensive evaluation method,the variable weight AHP-fuzzy comprehensive evaluation method is constructed,and the safety status of the tailings reservoir in Xiasha District of Pingjiang County is carried out.Based on the comprehensive evaluation,it is concluded that the tailings pond is in a safer production state,and this result is consistent with the results given by the safety evaluation unit.At the same time,the index weights under the constant weight calculation and the index weights under the variable weight calculation are compared and analyzed.It is concluded that the variable weight calculation can weaken the index weight value to a certain extent,highlight the weight value of the index with low score,and carry out the weight of the index.More reasonable distribution.(3)Because the whole calculation process of the comprehensive evaluation of the tailings pond safety is more complicated,a program is developed by MATLAB software to simplify the calculation process of the whole comprehensive evaluation,and the scores of five criterion indicators such as instability and dam failure and seepage damage are obtained.In the case,the final score and evaluation level of the entire tailings pond evaluation system are also obtained,and the relative error value with the hand calculation result is less than 1%,which saves the calculation time.(4)By changing the state value of the index,it is concluded that the safety state of the tailings pond changes with the change of the index parameters in the process of variable weight calculation,which is in line with the reality,while the safety state of the tailings pond in the process of constant weight calculation is not obvious.The geostudio software was used to simulate the seepage of the tailings pond under different working conditions and the safety status of the dam.It is concluded that the safety factor of the tailings pond meets the requirements.