Analysis and assessment of parameters shaping methane hazard in longwall areas

Further concentration of production and mining in coal seams of high methane content contribute to increase in emission of the gas in longwall areas. The article presents analysis of a survey concerning assessment of the parameters that influence the level of methane hazard in mining areas. The survey was conducted among experts on ventilation and methane hazard in coal mines. The parameters, influencing methane hazard in longwall areas, were assigned weights (numerical values). The summary showed which of the assessed parameters have a strong, or weak, influence on methane hazard in longwall areas driven in seams of high methane content.