单一低透气性厚煤层双排钻孔抽采技术研究

Study on Gas Drainage Technology with Double Row Boreholes in Single Low Permeability Thick Seam

针对单一低透气性突出厚煤层,在不采用卸压增透措施的条件下,对抽采钻孔布置进行优化,施工双排钻孔抽采,提高抽采效率;利用数值模拟的方法分析单双排孔孔周瓦斯压力的分布情况,并通过单双排孔瓦斯抽采量数据对比,阐述了双排孔抽采的有效性和可行性,为实现工作面正常接替节约了时间,保证了安全生产。

For single low permeability outburst thick coal seam, improve the extraction efficiency by optimization of drainage drillings layout with double - row drilling＇s construction without relief pressure and antireflective measures. Using numerical simulation method for the analysis of gas pressure distribution of single or double - row drillings around. Describes the double - row drillings drainage is effective and feasible through contrasting gas drainage quantity of single - row and double - row drillings. Ensuring safety in production and succeed to save time for face replacement.