An assessment of hazards to the risk-involved personnel in mine water disaster

The effectiveness and success rate of “self-rescue and mutual rescue” and “other rescue” in the emergency rescue of water burst disaster in mines depends largely on the scientific evaluation and reasonable prediction of the hazards to the underground risk-involved personnel throughout the evolution of the disaster. Given China’ s current lack of systematic quantitative evaluation in this regard,a hazard impact evaluation index system is constructed,consid- ering individual characteristics,mine roadway,water flow characteristics,gas conditions and other physical factors. By analyzing the dangerous form of disaster on the personnel involved in the mine water disaster evolution process,and combining with the characteristics of the mine water disaster influencing factors,three hazards to the risk-involved per- sonnel are defined,namely the water flow hazard,gas hazard and other hazard. The quantitative method and model of hazard assessment for the risk-related personnel are put forward,and the comprehensive evaluation calculation rules suitable for the multiple hazards to the risk-related personnel during the disaster evolution process are constructed. Taking a typical mine as an example,the dynamic evaluation of the hazard to the personnel during the water disaster is realized,and the differences in the water flow hazard to the personnel with different characteristics in the disaster situa- tion are analyzed. The sensitivities of slope,ground friction coefficient and water flow density to hazards are discussed, and corresponding disaster mitigation suggestions for reducing hazards are given. The results show that the proposed method can scientifically explain the influence of multiple factors in the evaluation and quantification of the personnel hazard assessment of the mine water disasters,which improves the ability of the hazard cognition for the risk-involved personnel in the disasters. At the same time,it provides highly targeted technical support for the rational formulation of emergency rescue plans. The research results have important theoretical guidance and practical value for ensuring the success rate of “self-rescue and mutual rescue” and the “other rescue” in the process of emergency rescue.