| Damage and failure rule of rock undergoing uniaxial compressive load and dynamic load |
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| 作者姓名： | 左宇军 李夕兵 周子龙 马春德 张义平 王卫华 |
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| 作者单位： | School of Resources and Safety Engineering, Central South University, Changsha 410083, China |
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| 基金项目： | Projects（50490274, 10472134, 50490272） supported by the National Natural Science Foundation of China |
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| 摘 要： | 1INTRODUCTION Naturalrockinlithosphereiscommonlyinthetri dimensionalstressstate,butthatofthewallrockaroundundergroundstructuresisoftentrans formedtouni dimensionalstatewhenundergroundstructureprojectsareputinpracticeororeisminedout.Butwhenthestressstateofrocktrans formsfromhighdimension stolowdimension s,ifcertainconditionsaresatisfied,rockburstwillpos siblyoccur1].Inordertoinvestigatetherockburstoccurrencemechanism,theuniaxialloadingtestisoftencarriedouttosimulateapproximatelytherockburs…
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| 关 键 词： | 岩石力学 单轴压缩实验 压应力 损伤力学 动力荷载 |
| 文章编号： | 1005-9784（2005）06-0742-07 |
| 收稿时间： | 2004-08-25 |
| 修稿时间： | 2004-12-10 |
Damage and failure rule of rock undergoing uniaxial compressive load and dynamic load |
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| Zuo Yu-jun , Li Xi-bing , Zhou Zi-long , Ma Chun-de , Zhang Yi-ping and Wang Wei-hua.Damage and failure rule of rock undergoing uniaxial compressive load and dynamic load[J].Journal of Central South University of Technology,2005,12(6):742-748. |
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| Authors: | Zuo Yu-jun Li Xi-bing Zhou Zi-long Ma Chun-de Zhang Yi-ping and Wang Wei-hua |
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| Affiliation: | (1) School of Resources and Safety Engineering, Central South University, 410083 Changsha, China |
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| Abstract: | For understanding the damage and failure rule of rock under different uniaxial compressive loads and dynamic loads, tests on red sandstone were carried out on Instron 1342 electro-servo controlled testing system with different uniaxial compressive loads of 0, 2, 4 and 6 MPa. It is found that peak stress, peak strain, elastic modulus and total strain energy decrease with the increase of static compressive stress. Based on the test results, the mechanism on damage and failure of rock was analyzed, and according to the equivalent strain hypothesis, a new constitutive model of elastic-plastic damage was established, and then the calculated results with the established model were compared with test results to show a good agreement. Furthermore the rule of releasing ratio of damage strain energy was discussed. |
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| Keywords: | uniaxial static compressive load dynamic load damage constitutive model energy |
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