| 软岩蠕变的温度效应及实验分析 |
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| 引用本文： | 李剑光,王永岩. 软岩蠕变的温度效应及实验分析[J]. 煤炭学报, 2012, 37(Z1): 81-85 |
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| 作者姓名： | 李剑光 王永岩 |
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| 作者单位： | 1.青岛科技大学 机电学院,山东 青岛 266061;;2.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,北京 100083 |
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| 基金项目： | 国家自然科学基金资助项目(50974077,51074094);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(SKLGDUEK1022) |
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| 摘 要： | 以砂岩为例,扩展到软岩,认为软岩蠕变是“强化作用”和“弱化作用”动态变化的过程,蠕变的各阶段发生与否和“弱化”“强化”强度对比有关。通过包含温度的砂岩单轴、三轴蠕变实验,并进行数据分析,得到结论：软岩蠕变的发生,力是主导因素,热是辅助影响因素,进一步地,应力差是主导因素。温度升高,软岩蠕变总量、起始蠕变量、瞬时热应变、蠕变速率都增大。因此,在深部软岩工程的设计中,应考虑岩体蠕变的温度效应。
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| 关 键 词： | 软岩 蠕变 温度效应 弱化作用 强化作用, |
| 收稿时间： | 2011-10-19 |
Experimental analysis of temperature effect in creep of soft rock |
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| LI Jian-guang,WANG Yong-yan. Experimental analysis of temperature effect in creep of soft rock[J]. Journal of China Coal Society, 2012, 37(Z1): 81-85 |
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| Authors: | LI Jian-guang WANG Yong-yan |
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| Affiliation: | 1,2(1.College of Electromechanical Engineering,Qingdao University of Science and Technology,Qingdao 266061,China;2.State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China) |
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| Abstract: | Taking sandrock as an example,expending to soft rock,the creep of soft rock is regarded as a dynamic course between strengthening function and weakening function,whether or not a certain stage of creep occurring depends on which is stronger.The following conclusions were obtained by doing uniaxial and triaxial creep experiments involving temperature on sandrock:whether or not creep occurring mainly depends on stress,further,stress difference.Temperature is only an indirect factor.With the temperature increasing,total creep deformation,initiative creep deformation,instantaneous thermal strain and creep velocity increase.Therefore,temperature effect should be considered in the design of deep soft rock engineering. |
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| Keywords: | soft rock creep temperature effect weaken function strengthen function |
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