工程地质学报2016，Vol.24Issue(5)：871-880,10.DOI:10.13544/j.cnki.jeg.2016.05.017
四川盆地焦石坝区块深部页岩力学特性试验研究
LABORATORY TESTS FOR MECHANICAL PROPERTIES OF DEEP-SEATED SHALE IN JIAOSHIBA BLOCK OF SICHUAN BASIN
摘要
Abstract
Uniaxial compression experiments on shale specimens of Wufeng-Longmaxi region are carried out to study the mechanical properties within bedding planes under different depths.The deformation feature,compressive strength and five fundamental failure modes are summarized.The result shows that the mechanical parameters of shale within bedding planes under different depths are turned out to be significant difference.Shale blocks within bedding planes present obvious brittle failure characteristics,which mainly forms of splitting failure accompanied by partial or localized shear failure.On the whole,as the sampling angle βenlarges,the elastic modulus and Poisson’s ratio increase at first and then decrease.Comparative analyses are carried out for the mechanical parameters varieties of the transverse and longitudinal diversity.The diversity factor of compressive strength is quite larger than that of elastic modulus and Poisson’s ratio.The effect of shale bedding planes is one of the main factor for the diversity of strength and failure mode.Bedding plane can determine shale compressive strength and failure mode to some extent.The research provides references for the wellbore stability analysis and hydraulic fracturing design in the shale gas exploitation.关键词
深部页岩/层理/力学性质/不同埋深/破坏方式Key words
Deep-seated shale/Bedding planes/Mechanical properties/Different depths/Failure modes分类
建筑与水利引用本文复制引用
汪虎,郭印同,张萍,王磊,侯振坤..四川盆地焦石坝区块深部页岩力学特性试验研究[J].工程地质学报,2016,24(5):871-880,10.基金项目
国家自然科学基金项目（No．51574218），中国科学院战略性先导科技专项（B 类）课题（编号XDB10040202）资助． （）
