【摘要】 基于裂隙聚团演化过程表现出的临界特征,利用逾渗理论,建立上覆岩层的逾渗模型,并分别分析沿走向和倾向条件下采动裂隙的逾渗特性.根据相似模拟试验结果,分析采动裂隙演化逾渗特性及周期来压之间的关系.结果表明:所建逾渗模型中逾渗概率、裂隙率、逾渗团大小、竖向破断裂隙概率、离层裂隙概率可以较为完备地定量描述裂隙特征,为建立裂隙与渗透率等相关参量的定量关系提供合适的数学载体.更多还原

【Abstract】 Based on the critical characteristics of accumulated crack evolution in some concentrated areas and the theory of percolation,the percolation model of the overlying strata has been established.The percolation characteristics of mining-induced cracks along strike and dip were studied.According to the results of the physical modeling test,the relationship between percolation characteristics and periodic roof pressure is obtained.The results show that in the percolation model,crack characteristics could be statistically calculated perfectly and quantitatively by the parameters including percolation probability,crack rate,size of percolation group,probability of cracks through seam and seam separated cracks,which could provide appropriately mathematical carrier for the relationship of cracks and other parameters such as permeability.更多还原