综采放顶煤工作面高位巷抽采关键技术研究

为了保证九里山矿1508工作面采空区瓦斯治理效果，通过现场数据测定、实验考察和理论分析，研究了推进度、抽采负压、抽采管网等高位巷抽采关键参数。研究结果表明，工作面煤层越厚、推进度越快，瓦斯涌出量越大；孔抽期间理想抽采负压为25～30 kPa、巷抽期间理想抽采负压为5～10 kPa，高位巷并联支路及管路阻力会影响高位巷的抽采效果。

Study on key technology of high-level extraction roadway in fully-mechanized top-coal caving face

In order to ensure the gas control effect of the gob in the 1508 working face of Jiulishan Mine，the key parameters of high-level roadway extraction such as propulsion，extraction negative pressure and extraction pipe network were studied through field data measurement，experimental investigation and theoretical analysis.The research results showed that the thicker the coal seam of the working face，the faster advancing speed of working face，the greater the gas emission；the ideal suction negative pressure during hole extraction was 25~30 kPa，and the ideal extraction negative pressure during roadway extraction was 5~10 kPa.The parallel branch and pipeline resistance of high level roadway would affect the extraction effect of high level roadway.