Mechanism of Water-Coal Mixture Burst in Exploiting Steeply-Inclined Thick Coal Seam

Water-coal mixture burst is a new mine disaster in exploiting steeply-inclined thick coal seam mining.In order to effectively prevent of water-coal body from bursting,we tested the physical and mechanical properties,performed the similar material simulation for surrounding rock deformation,analyzed the mechanism of water-coal outburst,and proposed countermeasures for preventing the burst from taking place.The results show that water-coal body burst can be avoided by effectively controlling major factors such as coal powder,water sources,the accumulation volume of water coal mixture,and mechanical conditions.