Causes of mining accidents of Bletilla striata in Shenmu

Coal dust explosion. The cause of the accident in Shenmu Baiji mining industry is that the goaf and the roof connected with it in the 506 continuous mining face and the mining safety pillar face collapsed in a large area, and the gas in the goaf was pressed into the roadway connected with the goaf, which made the coal dust deposited in the roadway rise and penetrated into the 506 continuous mining face, reaching the explosion concentration. Non-explosion-proof C 17 coal truck without horse sign in the middle of three lanes produces sparks, which ignite coal dust and explode, resulting in