Study on Statistical Analysis and Risk Assessment Flowchart Model of Coal and Gas Outburst Accidents in Guizhou Province with Countermeasures Discussion

In order to efficiently improve the situation of the high frequency of coal and gas outburst, the accidents of coal and gas outburst happening from 2013 to 2024 in Guizhou province have been counted in accordance with the occurrence year, accident grade, accident location and occurrence month in this paper firstly. The average number of the accidents and the dead persons are 1.75 and 14.92 respectively in each year, which can be understand from the statistics. Other conclusions can also be concluded from the statistics that: the accidents are only distributed in the relatively major accident and the major accident; the accidents happen in Bijie district and the deaths distribute in LiuPanshui district mostly and the least number of the accidents and deaths arise in Guiyang district; the accidents and deaths separate in March mostly and there are any accidents in February and September. Secondly, the risk factors of coal and gas outburst are divided into 4 first-level risk factors including personnel, equipment, environment and management and 18 secondary risk factors such as physical and mental quality of workers and so on. It has been found in the manner of weight calculation and system dynamic simulation that the equipment risk factor influences the coal and gas outburst risk system furthest and the personnel risk factor influences secondly and the environment risk factor influences thirdly and the management risk factor influences least. Finally, the associated countermeasures have been proposed in the aspects of personnel, equipment, environment and management and so on. The above researches can provide the prevention of coal and gas outburst with the reliable and scientific foundation.