| 岩石加荷破坏弹性能和耗散能演化特性 |
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| 引用本文： | 张黎明,高速,任明远,王在泉,马绍琼.岩石加荷破坏弹性能和耗散能演化特性[J].煤炭学报,2014,39(7):1238-1242. |
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| 作者姓名： | 张黎明 高速 任明远 王在泉 马绍琼 |
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| 作者单位： | 1.青岛理工大学 理学院，山东 青岛 266033；
2.青岛理工大学 蓝色经济区工程建设与安全山东省协同创新中心，山东 青岛 266033；
3.中国矿业大学 深部岩土力学与地下工程国家重点实验室，江苏 徐州 221008 |
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| 基金项目： | 国家自然科学基金资助项目(41372298);山东省高等学校科技计划资助项目(J10LE01);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资助项目(SKLGDUEK1106) |
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| 摘 要： | 开展大理岩、灰岩和砂岩的常规三轴试验,研究岩石变形过程的能量非线性演化特征。结果表明:岩样屈服前外力功大部分转化为弹性应变能存储于岩样内部,耗散能增加的很少,屈服点后耗散能快速增加,弹性能增速变缓。岩石的极限存储能具有围压效应,随着围压增加,岩石破坏时的极限存储能逐渐增加。极限存储能还与岩石本身的性质有关,岩石的强度越高,脆性越强,极限存储能愈大。灰岩极限存储能最大,大理岩极限存储能次之,砂岩极限存储能最小。根据弹性能和耗散能的演化规律,构建了岩石变形破坏过程中弹性应变能的非线性演化模型,理论模型与3种岩石的试验结果吻合较好。
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| 关 键 词： | 岩石破坏 弹性应变能 耗散应变能 能量演化 |
| 收稿时间： | 2013-09-11 |
Rock elastic strain energy and dissipation strain energy evolution characteristics under conventional triaxial compression |
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| Abstract: | In order to get features of energy nonlinear evolution during rock failure process，conventional triaxial compression tests of marble，limestone and sandstone were carried out.Results show that most of external work is converted into rock elastic strain energy before rock yielding.Dissipation strain energy increase rapidly after rock yielding.However，elastic strain energy increases slowly.Rock limit storage energy increases with the confining pressure increasing.Rock limit storage energy is also related to the rock nature.The higher strength and stronger brittleness of rock，its limit storage energy is larger.The maximum limit storage energy of limestone is biggest in three kinds of rock.The maximum limit energy storage of marble is bigger than that of sandstone.According to the interaction mechanism between energy accumulation and energy dissipation，rock energy nonlinear evolution model was established.The model agrees well with three kinds of rock experimental results. |
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| Keywords: | rock failure elastic strain energy dissipation strain energy energy evolution |
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