岩土力学Issue(z2)：57-61,5.
层状页岩力学特性及其破坏模式研究
Research on mechanical behaviors and failure modes of layer shale
摘要
Abstract
The mechanical characteristics of shale with different beddings coring were investigated by MTS815 rock mechanical test system. The failure modes,deformation and strength characteristics are obtained. The results indicate that:(1) It shows significantly different properties, when the sample paralleled to bedding plane;it has maximum value of compressive strength and minimum value when the sample has a angle of 30° with bedding plane. The elastic modulus deceases with the increase of the coring angle. (2) Under the condition of uniaxial compression, the angle of 0°, the main failure mode is split failure along the beddings;the angle of 30°, it is shear failure along the weakness plane, the angle of 60°, it is wide-angle shear failure along the weakness plane;the angle of 90°, it is stretch-draw failure. (3) Under the condition of triaxial compression, angle of 0°, it shows several failure surfaces, combined split and shear failure actions;the angle of 30°,it shows shear failure along to the beddings;the angle of 60°, it shows shear failure and the angle of failure surface is 45° to 50°;the angle of 90°, it shows shear failure and it has several parallel failure surfaces. The results can provide an important way for fracture optimization design.关键词
层状页岩/层理面/力学特性/破坏模式Key words
layer shale/bed plane/mechanical characteristics/failure mode分类
建筑与水利引用本文复制引用
贾长贵,陈军海,郭印同,杨春和,徐敬宾,王磊..层状页岩力学特性及其破坏模式研究[J].岩土力学,2013,(z2):57-61,5.基金项目
中石化科技部项目“页岩气网络压裂机制及设计方法研究”（No.P11015）；国家自然科学基金资助项目（No.51104144）；国家重点基础研究发展规划(973)（No.2010CB226701）；国家十二五重大专项示范工程项目3000型成套压裂装备研制及应用示范工程（No.2011ZX05048-006-002）。 （973）
