松藻煤矿下保护层瓦斯综合治理技术研究

Research on Lower protection layer gas comprehensive treatment technology at Song Zao Coal Mine

抽放是瓦斯治理之本,为了提高邻近层工作面瓦斯抽放量,降低风排瓦斯量,对抽放钻场加强管理:在+100四石门深钻场进行岩石截流钻孔施工10个孔,孔深50m以上,孔间距7m,施工不同倾角的钻孔。在各钻场施工期间加强钻场支护,当采面过钻场后进行水泥枕木支护及钻孔维护,改进钻场瓦斯抽放管道连接方式,防止死弯现象发生。

Gas Drainage is the fundamental method for gas treatment. In order to enhance the gas drainage amount at faces of adjacent seam, and decrease the wind gas drainage amount, the following enforcement management is adopted at the drainage drill field： through rock closure drilling method 10 holes are drilled at ＋100 four stone gate deep drilling field, each deep than 50m, and reaching 7m between one and the other hole, at various angles. During each drilling field construction period, drilling supports shall be reinforced, and concrete sleeper sup- port and holes drilling maintenance shall be conducted after the mining face passing the drilling field, and drilling field gas drainage piping connection method shall be improved so as to prevent dead bending phenomena.