【摘要】 地层组成对断层结构具有重要的影响或制约作用,基于物理模拟实验研究了不同砂岩含量地层的断层结构特征。结果表明,纯砂岩即泥岩含量为0时,断层结构为二元型;泥岩含量为4%~16%时,断层发育一元型结构;泥岩含量为16%~20%时,断层发育二元型结构;泥岩含量为20%~35%时,断层发育二元或三元型结构,二元或三元型结构的界线并不很明显;泥岩含量为35%~50%时,断层又发育二元型结构;泥岩含量为50%~100%时,断层回归于一元型结构。泥岩含量与破碎带的宽度、诱导裂缝个数具有明显的正相关关系,基本上呈近似正态分布。更多还原

【Abstract】 Stratigraphic composition has an important influence or restrict on fault structure. Fault structure characteristics with different sandstone contents of strata have been researched based on physical simulation experiments. The experiments show that the fault is a binary type when the sandstone content is 100%;the fault develops into a unary type while the shale content is 4%-16% and a binary type while the shale content is 16%-20%;and it develops into binary or ternary type with unclear boundaries while the shale content is 20%-35%;the fault is binary type again when the shale content is35%-50% and becomes unary type when shale content is 50%-100%. There is an apparent positive correlation among the shale content,the width of damage zone and the number of induced joints,which is an approximately normal distribution.更多还原