陆相泥页岩层理脆-延转化特性的研究

李军润; 尹彬瑞; 刘俊新; 张可; 唐伟; 朱宝龙

doi:10.13204/j.gyjzG21011102

陆相泥页岩层理脆-延转化特性的研究

doi: 10.13204/j.gyjzG21011102

西南科技大学土木工程与建筑学院, 工程材料与结构冲击振动四川省重点实验室, 四川绵阳 621010

基金项目:

国家自然科学基金项目(41672342)。

十三五国家重点研发计划(2017YFC0804600)

详细信息

作者简介:
李军润,男,1997年出生,硕士研究生。

通讯作者:
唐伟,男,1992年出生,博士研究生,943099404@qq.com。

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出版历程
- 收稿日期: 2021-01-11
- 网络出版日期: 2022-12-01

Research on Characteristics of Brittleness to Ductility Transition of Stratification in Continental Shale

School of Civil Engineering and Architecture, Southwest University of Science and Technology; Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province, Southwest University of Science and Technology, Mianyang 621010, China

摘要

摘要: 针对深部页岩气盖层脆-延转化压力与层理倾角关系不明确的问题,从岩石物理力学性质倾角出发,通过室内岩石单轴、三轴压缩试验进行探究,并基于Hoek-Brown破坏准则,引入层理损伤来预测脆-延转化临界压力。结果表明:1)围压的增大抑制了层理面对力学性质的控制作用;2)随着围压的增大,泥页岩的破坏模式逐渐统一为单一裂缝的剪切破坏;3)层理面对脆-延转化压力起着一定的控制作用,平行层理和垂直层理方向的脆-延转化压力明显高于其他方向的压力。
- 泥页岩 /
- 层理 /
- 体积应变 /
- 破坏模式 /
- Hoek-Brown强度准则 /
- 层理损伤 /
- 脆-延转化
Abstract: In view of the problem that the relation between pressure of brittleness to ductility transition on deep shale gas caprock and dip angles of stratification were indefinite, uniaxial and triaxial compression tests of rock were conducted from the perspective of physical and mechanical properties of rock. Based on Hoek-Brown Failure Criterion, stratification damage was introduced to predict the critical pressure of brittleness to ductility transition. The results showed that: to increase confining pressure could restrained the effect of stratification on mechanical properties of rock; with the increase of confining pressure, the failure mode of shale gradually tended to shear failure with a single fracture;stratification surfaces played a certain role in controlling the pressure of brittleness to ductility transition, and the pressure of brittleness to ductility transition in parallel and vertical stratification directions was significantly higher than that of rock at other dip angle directions with stratification.
- shale /
- stratification /
- volume strain /
- failure mode /
- Hoek-Brown Failure Criterion /
- stratification damage /
- brittleness to ductility transition

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参考文献(17)

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