Analysis and prevention technical of coal and gas outburst accidents in Pingyu Mining Area

According to the coal and gas outburst problem in Pingyu Mining Area, a statistic analysis was conducted on 155 outburst accidents occurred in the mining area and a study was conducted on the principal influence factors of the outburst accidents in the mining area. The outburst law and features were revealed. The relevant prevention and control technical countermeasures were provided. The study results showed that the gas outburst in Pingyu Mining Area was affected by the geological structures, mining depth and other factors. In the shallow and deep depth and the geological structures and non geological structure regions, the gas outburst intensity and the outburst frequency had big changes. With the mining depth increased, the geological mechanics environment and mechanics property were continuously changed. With the joint function of the deep high stress and high pressure methane gas, under the influences of the disturbances to the engineering, the coal and gas outburst would be easily occurred. According to the gas outburst law, a regional gas comprehensive control technology was applied. In the gas control, with the measures adjusted to the local conditions, one mine with one polity, comprehensive control, drainage and mining with the standards, layout from mining to excavation, outburst prediction, monitoring and early warning, deep complicated dynamic disaster prevention and other aspects, the gas outburst accidents could be effectively controlled.