Application of composite weighting TOPSIS in rockburst risk assessment

In order to reasonably and accurately evaluate the risk of rockburst in coal mines, on the basis of existing examples of rockburst risk evaluation, from two aspects of coal mine geological factors and mining factors, 10 main influencing indicators were selected, the entropy weight method and the index correlation method were used to calculate the weight of each evaluation index affecting the risk of rockburst respectively, and then the comprehensive weight of each index was obtained according to the method of composite weighting, the risk evaluation model of rockburst based on the theory of approximate ideal solution theory was constructed. Taking Chongqing Yanshitai Coal Mine as an example, 20 groups of sample data for evaluating the risk of rockburst were selected for analysis. Firstly, the optimal and worst conditions for evaluating the risk of rockburst were determined, and then the distance between the optimal and worst conditions in each evaluation scheme were calculated, finally, the optimal and worst distances were synthesized to determine the relative closeness degree of the evaluation object. The application results show that the evaluation results are consistent with the actual situation, and the evaluation results of this model are more scientific and accurate than those of other models, indicating that this method has good practical value.