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通过数值模拟软件分析和现场工程试验等手段,研究了水力冲孔与压裂耦合致裂增透技术对豫西“三软”煤层煤体位移、应力分布、渗透率的影响。研究结果表明,水力冲孔与压裂耦合致裂增透技术可以使水力冲孔泄煤钻孔间煤体应力降低20%以上、渗透率提高35%以上;告成矿23041下副巷(北)揭煤工作面穿层钻孔平均抽采浓度较相同瓦斯地质条件提高4.3倍,日平均抽采纯瓦斯量较相同瓦斯地质条件提高6.7倍,研究成果可推广应用于郑州矿区底板岩巷穿层钻孔预抽煤层瓦斯区域防突措施。
By means of numerical simulation software analysis and field engineering test, the influence of hydraulic punching and fracturing coupled with anti-seepage technology on the displacement, stress distribution and permeability of coal in the western Henan “three soft” coal seam was studied. The results show that the combination of hydraulic punching and fracturing can increase the stress of coal between hydraulic punching and coal drainage borehole by more than 20% and increase the permeability by 35% The average extraction concentration of boreholes in coal working face is 4.3 times higher than the same gas geological conditions, and the average daily average gas drainage capacity is 6.7 times higher than the same gas geological conditions. The research results can be widely applied to the drilling of floor rock strata Preventing Outburst Measures in Gas Area of Pre - pumping Coal Seam.