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保安煤业8#、9#煤层掘进过程中发生的瓦斯动力现象为压出型突出,经鉴定8#、9#煤层为煤与瓦斯突出煤层,保安煤矿为突出矿井。把15#煤层作为保护层开采(15#煤层经鉴定为非突出煤层),由下行开采变为上行开采,减少煤与瓦斯突出威胁;利用顶板走向高抽巷和穿层钻孔抽放上邻近层及采空区瓦斯,解放上部8#、9#煤层,实现区域消突,把8#、9#突出煤层变为不突出煤层;利用伪倾斜高抽巷、专用排瓦斯巷和穿层钻孔抽放初采瓦斯,解决15#煤层工作面上隅角瓦斯超限问题。
The gas dynamic phenomenon occurred during the excavation of No.8 and No.9 coal seams in Bao’an Coal Industry is prominent in extrusion type. The coal seam and gas outburst seam in No. 8 and No. 9 coal seam have been identified and the coal mine in Baoan Mine has become the prominent mine. 15 # seam mining as a protective layer (15 # seam identified as non-prominence) from the mining down into the mining, reducing the threat of coal and gas outburst; Layer and goaf gas, liberating the upper 8 #, 9 # seam, to achieve regional elimination of sudden, the No. 8, No. 9 prominent seam into non-prominent seam; the use of pseudo-inclined high pumping Lane, Hole drainage initial mining gas to address 15 # seam face gas angle overhang problem.