张俊文;范文兵;宋治祥;霍英昊;丁露江;姚子祥;

• 1:中国矿业大学(北京)深部岩土力学与地下工程国家重点实验室
• 2:中国矿业大学(北京)能源与矿业学院
• 3:中国矿业大学(北京)煤炭安全开采与地质保障国家级实验教学示范中心

摘要(Abstract)：

采用多功能真三轴流固耦合系统,对深部砂岩试件进行了不同模拟深度、不同应力路径下的还原初始应力试验,得到了相应工况下深部砂岩试件的全应力-应变曲线,分析了相应的变形及强度特性.结果表明:在还原σ_z,σ_y,σ_x过程中,σ_z-ε_x,σ_z-ε_z,σ_z-ε_y曲线出现了长度不一的"平台"特征;深部砂岩试件峰值强度随着模拟深度的增加而增大;通过引入压裂系数,得出了从初始应力状态点到峰值强度点对应的体积变形量仅占初始应力状态下体应变的10%～20%;不同应力路径下,相比于Drucker-Prager准则,Mogi-Coulomb准则更适合描述岩石的强度特性.

关键词(KeyWords)： 深部砂岩;真三轴试验;应力路径;力学特性;强度准则

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划项目(2016YFC0600901,2018YFC0604703);; 国家自然科学基金项目(52034009,51974319);; 中国矿业大学深部岩土力学与地下工程国家重点实验室开放基金项目(SKLGDUEK1828)

作者(Author): 张俊文;范文兵;宋治祥;霍英昊;丁露江;姚子祥;

Email:

DOI: 10.13247/j.cnki.jcumt.001236

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