Gas Occurrence Regularity And Disaster Risk Zoning In Hancheng Mining Area

China is a big coal country,the proportion of coal in the one-time energy production and consumption structure accounted for more than 70%,and coal plays an important role in the protection of China’s energy security.The geological condition of coal in China is complex,at the same time,more than 50%of our country is high gas,coal and gas outburst mine.Taking Hancheng mining area as the research object,through the collection of the main ore seam coal geology,gas geology and drilling data,on the basis of geology,gas geology and mathematical statistics theory.The gas occurrence regularity in the studied area,tectonic coal or gas and the gas to danger zone,basically have the following results1 Through statistical analysis of mining gas drilling data,to clarify the hydrocarbon content in the layer of coal seam in the study area and regional distribution,system to study the occurrence characteristics of coal seam,coal rank,coal quality,hydrological geology and structure on the influence of coal containing gas.2 On the basis of hydrocarbon distribution system research,by combining the field in geophysical well logging curve,preliminary to know the distribution characteristics of the coal body structure in the study area;Use structure curvature method,to study the characterizations of stratum deformation characteristics,finally combining borehole core analysis tectonic coal mining area of Seoul comprehensive prediction and convicted.3.The characteristics of hydrocarbon content of coal seam mining area and coal body structure is studied,the selection of structure,air content,surrounding rock and coal rank 4 first-level indicators,based on the analytic hierarchy process(ahp)to construct the risk assessment model of coal and gas outburst,the main mining area of Seoul working bed for disaster risk zoning,and analyze its vertical zoning characteristics on the surface of the peace.