Application of Deep-hole Pre-splitting Blasting Technology in High Inclinationangle and Thin Coal Seam

This paper introduces the technological process and on-the-spot tests of deep-hole pre-splitting blasting technology.The research shows that the technology can effectively eliminate the stress to initiate the outburst and the nonuniformity of the coal mass structure,improve the coal strength and seam permeability,obviously raising gas drainage effect from coal seam apparently,effectively prevent and eliminate the coal and gas outburst danger during the roadway excavation period and the roadway driving speed is increased by 2—3 times.