The 4th International Symposium on Mine Safety Science and Engineering (ISMSSE2018)

263 / 2018-03-14 15:06:28

Risk Assessment Index and Grading Method of Major Hazard Sources in Tailings Ponds

Tailings; Major hazard; Evaluating indicator; System safety analysis; Improved analytic hierarchy process

Mine Dynamics Disaster > tailings pond

It is to determine the evaluation index and grading standard of the major hazard sources of the tailings reservoir, so as to facilitate the risk classification management. According to the internal safety mechanism and related standards of tailings reservoir, the evaluation index is divided into 3 levels. It is composed of two kinds of 20 specific indexes, which are the inherent risk index and the affiliated risk index. Evaluation index method is used to quantify the grading standard by the evaluation matrix. The results show that the index affects the safety of tailings are mainly tailings hazard categories, full capacity, the total height of the dam, safety, drainage system and the earthquake intensity. According to the comprehensive analysis method and the correlation degree analysis theory, the characteristic value and relative risk index of the evaluation index were quantified, and the results were all changed in 1~9. Based on the expert scoring method and the improved analytic hierarchy process (AHP), the weights of 20 evaluation indexes to the overall hazard assessment of tailings are determined respectively. According to the evaluation index of each characteristic value of the evaluation index P, the major hazard sources of the tailings reservoir are divided into 4 levels. The results can provide a basis for enterprises to identify, classify and declare major hazard sources of tailings, and to provide the basis for the government's hierarchical supervision.