保德煤矿多层夹矸低透气性厚煤层多分支穿矸钻孔施工及抽采效果研究

Study on construction and drainage effect of multi branch gangue drilling in thick coal seam with low permeability and thick coal seam in BAODE coal mine

为解决保德煤矿多层夹矸低透气性煤层瓦斯抽采效率低的问题,在矿井三盘区和二盘区采用不同施工工艺实施了多分支穿矸瓦斯抽采定向长钻孔。根据现场实验及瓦斯抽采数据对比,优化了保德煤矿瓦斯抽采定向长钻孔的施工工艺,提高了瓦斯抽采效果。