Prevention and Control Technology of Pressure Bump in Jurassic System Seams Group in Datong Mining Area

According to the mine strata pressure bumping damages occurred from the mining in Jurassic System seams group in Datong Mining Area in the passed several years, based on the summarization on the mine strata pressure bumping occurred conditions under the mining conditions, the features and major influence fact ors of the mine strata pressure bumping occurred in the Datong Mining Area were analyzed in detail and the related comprehensive prevention and control technology was provided.The main features would be the shallow mining depth, regional continuity, high correlation degree of the support pressure occurred in the coal mining. The main influence factors would be the special hard seam, hard roof and hard floor of the mining area, geological structure and mining additional stress.Based on the circu mstances, a steady prediction and early warning method of the mine strata pressure bumping, a optimized mine roadway layout, modified weakening of the seam and ro ck strata, enhanced support and other mine strata pressure prevention and control technology were provided.With the site applications of the prevention and control tec hnology, the effect was remarkable.