基于激波时域特性的煤体破裂过程数值分析

Numerical Analysis of Fracture Process of Coal Mass Based on Basis Wave Time Domain

通过采用RFPA-Dynamic软件模拟水激波对煤体的物理作用关系,研究波前时间与煤体裂隙发育状况的关系,最终得出:波前时间越短,波头传播速度越快,辐射范围越大;增大波前时间,相应的衰减系数也会增大;减小波前时间,煤体中的裂隙度增加且长度较小。

Using RFPA-Dynamic numerical analysis software can simulate the physical interaction between water shock and coal, the relationship between wavefront time and the development of coal fractures is studied. The results show that the shorter the wavefront time will make the stress wave expansion speed radiation scope,at the same time, the decrease of the wavefront time will make the stress wave velocity in coal increases,increasing the wavefront time will make the corresponding attenuation coefficient be larger,reducing the wavefront time can produce more small cracks.