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采前瓦斯高效抽采是有效解决高瓦斯含量特厚煤层瓦斯治理的重要手段。针对近水平特厚煤层面临的煤层厚度大、瓦斯含量高、瓦斯抽采难度大等问题,采用“底板穿层钻孔+定向长钻孔”的井下立体协调抽采模式,并结合工作面顺层钻孔进行辅助抽采。
Efficient gas drainage before mining is an effective means to solve the gas control in the extremely thick coal seam with high gas content. In view of the problems of large thickness of coal seam, high gas content and difficulty in gas drainage in near-level and extremely thick coal seam, a three-dimensional underground coordinated drainage mode with “floor penetrating drilling + directional long drilling hole” is adopted and combined with work Drilling along the surface of the auxiliary extraction.