QUANTITATIVE RISK ASSESSMENT OF MINERS INJURY DURING EXPLOSIONS OF METHANE-DUST-AIR MIXTURES IN UNDERGROUND WORKINGS

This article proposes a solution to the problem of methodological support of injury to coal mine personnel probability quantification during explosions of methane-dustair mixtures. The relevance of using a risk-based approach, due to the need to implement targeted preventive measures to protect personnel from explosions, is justified. The data on causes of damage to miners during explosions of methane and dust in coal mines in Russia distribution are provided. The analysis of factors affecting the size of injury to personnel by air shock waves zone during methane and dust explosions was carried out, during which quantitative dependencies were established that allow to probabilistically assess the injury to mine personnel during explosions, considering the distance from the explosion zone, initial composition and volume of explosive mixture, aerodynamic, geometric and topological parameters of mine workings, workings with air provision. The principles of using the index of explosive mixture effective energy reserve are justified. A probit model is presented to determine the probability of fatal injury to a person when exposed to a blast shock wave overpressure. For the purpose of testing the proposed method, an example of determining the injury to a person probability during explosion of a methane-dust-air mixture in the development face is given depending on the distance from explosion zone border, and the size of danger zone is also determined. It was concluded about the possibility of the proposed method of occupational risk quantification applicationin order to ensure the safety of underground mining facilities and other hazardous production facilities.