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通过分析开采条件下工作面前方支承压力分布规律和煤体卸压破坏全过程的采动力学行为,采用实验室实验研究了工作面前方承载应力环境下岩体渗透性的变化;揭示了采动影响下采场空间裂隙发育与演化规律,提出工作面前方裂隙发育区形成的主要原因是强度破坏,并分为原岩裂隙区、应力集中裂隙孕育区、卸压剪切裂隙发育区,渗透性较强的区域为卸压剪切裂隙发育区,与塑性区近似重合。
Through the analysis of the supporting pressure distribution law in front of work face and the mining dynamic behavior in the whole process of pressure relief and destruction of coal under mining conditions, the laboratory experiment was carried out to study the permeability change of rock mass in front of working face under stress environment. The main reason of formation of fissure development zone in front of working face is strength failure, which is divided into original rock fissure zone, stress concentration fissure inoculation zone, pressure relief shear fissure development zone, permeability The stronger area is the development zone of the pressure-relief shear fracture, which coincides with the plastic zone approximately.