Construction of Safety Assessment System based on Risk Closed-Loop Management of Underground Mine Blasting Stage

Abstract

Aiming at the dynamic safety control problems caused by the instantaneous release of high energy and the coupling of multi-source risks in blasting operations in underground mines, a safety assessment system based on closed-loop risk management is constructed. Through the three-dimensional framework of "risk source-impact path-accident consequence", we integrate the four-dimensional indicators of blasting parameters, operating environment, personnel behavior and monitoring response, integrate the Delphi method and coefficient of variation (CV) method to screen the key factors, and combine the hierarchical analysis method to realize the subjective and objective empowerment. A five-level risk threshold standard and a weighted fuzzy comprehensive evaluation model are established to quantify the high coupling risk relying on the triangular subordinate function. The engineering validation shows that the response time of the system is lower than 0.8 seconds, and the accuracy of risk level discrimination is 27.8% higher than that of the traditional method, which effectively supports the dynamic risk warning and closed-loop control of underground blasting.