| 岩石厚壁圆筒三向压缩下的卸荷试验与岩石强度破坏 |
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| 引用本文： | 张后全,刘红岗,贺永年,韩立军. 岩石厚壁圆筒三向压缩下的卸荷试验与岩石强度破坏[J]. 北京科技大学学报, 2011, 0(7): 800-805 |
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| 作者姓名： | 张后全 刘红岗 贺永年 韩立军 |
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| 作者单位： | 中国矿业大学深部岩土力学与地下工程国家重点实验室;中国矿业大学力学与建筑工程学院; |
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| 基金项目： | 国家自然科学基金资助项目(No.50804046;No.50490273;No.50774082) |
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| 摘 要： | 为研究地下工程开挖影响,采用厚壁圆筒多轴应力试验,对试样施加较高的轴对称内、外壁压力及轴向荷载后,进行内、外壁卸荷破坏试验.试验的破坏结果是在厚壁圆筒壁间形成环向主要破裂面.这一破裂现象在以往相关文献中未见报道,与通常弹塑性理论分析的较高应力发生在圆筒内缘、破坏从内缘开始的结论不同.这一结果与深部矿山巷道围岩出现的分区破裂(zonal disintegration)现象类似.
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| 关 键 词： | 岩石力学 厚壁圆筒 卸荷 缺陷结构 失效分析 |
Unloading experiment and rock strength failure of rock thick-walled cylinders under triaxial compression |
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| ZHANG Hou-quan,),LIU Hong-gang),HE Yong-nian),HAN Li-jun) ) State Key Laboratory for Geomechanics , Deep Underground Engineering,China University of Mining , Technology,Xuzhou ,China ) School of Mechanics , Civil Engineering,China. Unloading experiment and rock strength failure of rock thick-walled cylinders under triaxial compression[J]. Journal of University of Science and Technology Beijing, 2011, 0(7): 800-805 |
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| Authors: | ZHANG Hou-quan ) LIU Hong-gang) HE Yong-nian) HAN Li-jun) ) State Key Laboratory for Geomechanics Deep Underground Engineering China University of Mining & Technology Xuzhou China ) School of Mechanics Civil Engineering China |
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| Affiliation: | ZHANG Hou-quan1,2),LIU Hong-gang2),HE Yong-nian1),HAN Li-jun1) 1) State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining & Technology,Xuzhou 221008,China 2) School of Mechanics and Civil Engineering,China |
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| Abstract: | In order to study the excavation effect in underground engineering,multiaxial tests were adopted on rock thick-walled cylinders.First,high axial pressure,confining pressure and inner pressure were applied on the cylinder samples.Then,inner and confining pressures were unloaded in time order.The experimental results show that a main ringlike failure surface forms in the thick wall of the cylinders.This kind of ringlike failure phenomenon,which is different from the result of failure initiated at the inner su... |
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| Keywords: | rock mechanics thick-walled cylinders unloading defect structures failure analysis |
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