Research on Joint Protection Layers and Gas Prevention Technology in Outburst Coal Seams

Outburst closed distance coal seam distances are extremely difficult to mine, and commonly involved in safety accidents the process of mining. Based on engineering background Wulan Coal Mine at western margin Ordos Basin, this paper presents a theoretical analysis, analogies, numerical simulations determine optimal mining sequence for #7, #8, #2, #3 seams. Floor penetration drilling was used eliminate outbursts #7 #8 seams, gas control #2 seams achieved using ground pump release pressured gas. We established comprehensive management technology system emissions from short-distance joint protection layer outburst Mine, where pressure relief drainage were carried out by through floor surface extraction. Through field tests, pre-drainage rate 66.8%, 68.1%. This shows that protective combined with extract pressure-relief can protect