深部煤巷条带近距离底板巷卸压增透模型研究

Pressure relief and permeability enhancement model of close-distance floor roadway in deep coal roadway stripe

为解决深部煤层透气性差、瓦斯抽采难度大、抽采达标时间长、抽采效率低等问题,采用实验室实验、理论分析、数值模拟、现场试验等多种研究方法,揭示了含瓦斯煤卸荷增透特性,分析了深部巷道围岩卸压、煤层增透规律,研究了煤巷条带卸压底板岩巷最优位置,给出了煤层显著增透区、一般增透区的计算方法和卸压底板岩巷与煤层合理距离的判别准则,构建了煤巷条带底板岩巷结合水力化技术卸压增透模型,工程应用表明底板岩巷上覆煤岩层卸压增透效果显著,为类似条件提供借鉴意义。

Aiming at the poor gas permeability,difficult gas extraction,long time to reach the extraction standard,and low extraction efficiency,laboratory experiments,theoretical analysis,numerical simulation,and field tests were carried out.The characteristics of pressure relief and permeability enhancement of gas-bearing coal is to revealed,and the law of surrounding rock pressure relief and coal seam permeability enhancement in deep roadway is analyzed,the optimal position of floor rock roadway pressure relief in coal roadway strip is studied,and the calculation of significant and general permeability enhancement area of coal seam is given,and the criterion for the reasonable distance between the pressure relief floor rock roadway and the coal seam is proposed.Finally,a model is constructed for the pressure relief and permeability enhancement of the coal roadway stripe floor rock roadway combining with hydraulic technology.