【摘要】 采用自行开发的离散元软件FractureToKarst,根据国际岩石力学协会对岩石的分类,讨论了低延展性裂隙岩体典型单元体(REV)的存在性及大小,并给出确定其存在性的一般方法。根据研究结果可知,低延展性裂隙岩体REV存在的条件为裂隙平均间距在0.6 m以下,即极密间距、很密间距、密间距和中等间距裂隙岩体存在REV;裂隙平均间距大于0.6 m,即宽间距、很宽间距和极宽间距裂隙岩体不存在REV。更多还原

【Abstract】 The FractureToKarst software which is a main analysis tool in this paper and developed by the listed authors,is a DFN(Discrete Fracture Network) software.According to the Standard of Rock Fracture Classification established by ISRM in 1978,this paper discussed the existence and sizes of representative elementary volume(REV) of low-ductility fractured rock masses using the FractureToKarst and proposed a general method to determine the existence of REV.Combined with the existing study of the fractured-rock flow,the major results are concluded as follows:(1)in the rock masses when their average spacing is less than 0.6 m,the REV exists;(2)when their average spacing is more than 0.6 m,the REV does not exist.更多还原