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引入支承压力差概念,对窄煤柱条件下巷道变形的机理进行了分析,提出通过注水泥浆提高煤柱自承能力,减小上、下两帮压力差,达到减少巷道变形的方法。基于球形扩散理论模型,确定了注浆孔间排距和注浆压力的合理参数。
The concept of supporting pressure difference is introduced to analyze the mechanism of roadway deformation under narrow coal pillar conditions. A method to reduce the deformation of roadway is proposed by increasing the self-bearing capacity of coal pillar and reducing the pressure difference between the upper and lower coal blocks by injecting slurry. Based on the theoretical model of spherical diffusion, the reasonable parameters of the distance between grouting holes and grouting pressure were determined.