Application and Effect Analysis of Coal Seam Water Injection Technology in Lyujiatuo Coal Mine

In order to reduce the dust concentration in 5424Z working face, a method of hydrostatic injection of coal seam for 5424Z working face is proposed, that is using moisture to wet the coal to achieve the effect of dust fall and gas control. The results show that: after two hydrostatic injection tests on the coal seam, the dust fall rate of the working face is 64.25% and 60.04% respectively, and the dust fall rate of the track way is 17.71% and 29.79% respectively. The average gas concentration is 68% and 65%; the gas release in working face is even, and the water injection effect is remarkable.