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| ENERGY DISSIPATION OF ROCK FRACTURE UNDER THERMO- MECHANICAL COUPLING AND DYNAMIC DISTURBANCES |
| YIN Tubing1，2，LI Xibing1，2，YE Zhouyuan1，2，GONG Fengqiang1，2，ZHOU Zilong1，2 |
| (1. School of Resources and Safety Engineering，Central South University，Changsha，Hunan 410083，China；2. Hunan Key Laboratory of Resources Exploitation and Hazard Control for Deep Metal Mines，Central South University，Changsha，Hunan 410083，China) |
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Abstract Under different temperatures(20 ℃，100 ℃，200 ℃，300 ℃)，the impact experiments of sandstone samples with different axial pressures(0，20，60，80 MPa) were carried out by a self-developed dynamic testing system under thermo-mechanical coupling. With the test results，the damage dissipation energy of rock under thermo-mechanical coupling can be calculated based on the principle of energy dissipation in conventional split Hopkinson pressure bar(SHPB). The results show that，at a given dynamic load，rock samples at temperatures of 20 ℃，200 ℃ and 300 ℃ and axial pressure of 20 MPa have the maximal energy-absorb capability；but at temperature of 100 ℃，rock samples under axial pressure of 0 MPa have the maximal energy-absorb capability. The results are helpful for understanding rock fracture mechanism of rock under high temperatures and can be used in the practical rock engineering.
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Received: 05 November 2012
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| [1] 尹土兵. 考虑温度效应的岩石动力学行为研究[博士学位论文][D].长沙：中南大学，2012.(YIN Tubing. Study on dynamic behavior of rocks considering thermal effect[Ph. D. Thesis][D]. Changsha：Central South University，2012.(in Chinese))
[2] 李夕兵，古德生. 岩石冲击动力学[M]. 长沙：中南工业大学出版社，1994：69–93.(LI Xibing，GU Desheng. Rock impact dynamics[M]. Changsha：Central South University of Technology Press，1994：69–93.(in Chinese))
[3] 胡柳青，李夕兵，赵伏军. 冲击荷载作用下岩石破裂损伤的耗能规律[J]. 岩石力学与工程学报，2002，21(增2)：2 304–2 308.(HU Liuqing，LI Xibing，ZHAO Fujun. Study on energy consumption in fracture and damage of rock induced by impact loadings[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(Supp.2)：2 304–2 308. (in Chinese))
[4] 夏昌敬，谢和平，鞠 杨，等. 冲击载荷下孔隙岩石能量耗散的实验研究[J]. 工程力学，2006，23(9)：1–5.(XIA Changjing，XIE Heping，JU Yang，et al. Experimental study of energy dissipation of porous rock under impact loading[J]. Engineering Mechanics，2006，23(9)：1–5.(in Chinese))
[5] 高文学，刘运通. 冲击载荷作用下岩石损伤的能量耗散[J]. 岩石力学与工程学报，2003，22(11)：1 777–1 780.(GAO Wenxue，LIU Yuntong. Energy dissipation of rock damage under impact loading[J]. Chinese Journal of Rock Mechanics and Engineering，2003，22(11)：1 777–1 780.(in Chinese))
[6] 叶洲元，李夕兵，万国香，等. 受三维静载压缩岩石对冲击能的吸收效应[J]. 爆炸与冲击，2009，29(4)：419–424.(YE Zhouyuan，LI Xibing，WAN Guoxiang，et al. Impact energy-absorption property of rock under triaxial compression[J]. Explosion and Shock Waves，2009，29(4)：419–424.(in Chinese))
[7] 许金余，吕晓聪，张 军，等. 围压条件下岩石循环冲击损伤的能量特性研究[J]. 岩石力学与工程学报，2010，29(增2)：4 159–4 165. (XU Jinyu，LU Xiaocong，ZHANG Jun，et al. Research on energy properties of rock cyclical impact damage under confining pressure[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(Supp.2)：4 159–4 165.(in Chinese))
[8] 李夕兵，古德生. 岩石在不同加载波条件下能量耗散的理论探讨[J].爆炸与冲击，1994，14(2)：129–139.(LI Xibing，GU Desheng. Energy dissipation of rock under impulsive loadings with different waveforms[J]. Explosion and Shock Waves，1994，14(2)：129–139.(in Chinese))
[9] 李夕兵，赖海辉，古德生. 不同加载波下矿岩破碎的能耗规律[J].中国有色金属学报，1992，(2)：10–14.(LI Xibing，LAI Haihui，GU Desheng. Energy consumption of ore rocks under different loading waveforms[J]. Transactions of Nonferrous Metals Society of China，1992，(2)：10–14.(in Chinese))
[10] LI X B，LOK T S，ZHAO J. Dynamic characteristics of granite subjected to intermediate loading rate[J]. Rock Mechanics and Rock Engineering，2005，38(1)：21–39.
[11] 尤明庆，华安增. 岩石试样破坏过程的能量分析[J]. 岩石力学与工程学报，2002，21(6)：778–781.(YOU Mingqing，HUA Anzeng. Energy analysis of failure process of rock specimens[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(6)：778–781.(in Chinese))
[12] 王学滨. 岩样单轴压缩轴向及侧向变形耗散能量及稳定性分析[J].岩石力学与工程学报，2005，24(5)：847–853.(WANG Xuebin. Dissipated energies and stabilities of axial and lateral deformations of rock specimens in uniaxial compression[J]. Chinese Journal of Rock Mechanics and Engineering， 2005，24(5)：847–853.(in Chinese))
[13] 谢和平，鞠 杨，黎立云. 基于能量耗散与释放原理的岩石强度与整体破坏准则[J]. 岩石力学与工程学报，2005，24(17)：3 003–3 010. (XIE Heping，JU Yang，LI Liyun. Criteria for strength and structural failure of rocks based on energy dissipation and energy release principles[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(17)：3 003–3 010.(in Chinese))
[14] 谢和平，彭瑞东，鞠 杨. 岩石变形破坏过程中的能量耗散分析[J].岩石力学与工程学报，2004，23(21)：3 565–3 570.(XIE Heping，PENG Ruidong，JU Yang. Energy dissipation of rock deformation and fracture[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(21)：3 565–3 570.(in Chinese))
[15] 李树忱，李术才，朱维申，等. 能量耗散弹性损伤本构方程及其在围岩稳定分析中的应用[J]. 岩石力学与工程学报，2005，24(15)：2 646–2 653.(LI Shuchen，LI Shucai，ZHU Weishen，et al. Damage constitutive equations for energy dissipation and its applications to stability analysis of surrounding rock mass of caverns[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(15)：2 646– 2 653.(in Chinese))
[16] 李夕兵，尹土兵，周子龙，等. 温–压耦合作用下的粉砂岩动态力学特性研究[J]. 岩石力学与工程学报，2010，29(12)：2 377–2 384. (LI Xibing，YIN Tubing，ZHOU Zilong，et al. Study on mechanical properties of sandstone under coupling effects of temperature and pressure[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(12)：2 377–2 384.(in Chinese))
[17] 叶洲元. 动力扰动下高应力岩石力学特性研究[博士学位论文][D]. 长沙：中南大学，2008.(YE Zhouyuan. Study on mechanical characteristics of statically loaded rock under dynamic loads[Ph. D. Thesis][D]. Changsha：Central South University，2008.(in Chinese)) |
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2013, Vol. 32 
