|
|
|
| Physical and mechanical properties of granite after dynamic disturbance #br# |
| YANG Fujian1，2，HU Dawei1，2，ZHOU Hui1，2，LU Jingjing1，2，ZHANG Fan3 |
| (1. State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，Wuhan，Hubei 430071，China；2. University of Chinese Academy of Sciences，Beijing 100049，China；3. School of Civil Engineering and Architecture，Hubei University of Technology，Wuhan，Hubei 430068，China) |
|
|
|
|
Abstract Most of the rock masses after dynamic disturbance return to the original state of stress or have the stress redistributed within a certain time period. One dimensional coupled dynamic and static loading tests were carried out under a new type of static and dynamic-static loading combinations to compare the characteristics of mechanical properties，permeability，wave velocity and acoustic emission of granite. The damage variable defined according to the ultrasonic velocity increases gradually with the increasing of the static axial pressure(ASP)，decreases first and then increases with the increasing of frequency. The maximum damage degree reaches 16%. The permeability and Poisson's ratio of samples are larger than the results of undisturbed samples，increase with the increasing of ASP，and increase at first and then decrease with the increasing of frequency. Both show high sensitivity to the high ASP. The strength and elastic modulus are less than the results of undisturbed specimens，increase with the increasing of ASP，and vary differently at the different levels of ASP with the increasing of frequency. Compared with the energy release of undisturbed rock samples，the specimen after the dynamic loading in the uniaxial compression process have no initial and latent stages of energy release and enter directly into the active stage of energy release with the duration prolonged and a lag phenomenon exists in the relative stress at the end and the energy release peak.
|
|
|
|
|
|
[1] 马春德，李夕兵，陈 枫，等. 单轴动静组合加载对岩石力学特性影响的试验研究[J]. 矿业研究与开发，2004，24(2)：2–7.(MA Chunde，LI Xibing，CHEN Feng，et al. Experimental study on the influence of uniaxial dynamic and static loading on rock mechanical properties[J]. Mining Research and Development，2004，24(2)：2–7.(in Chinese))
[2] LI X B，ZHOU Z L，LOK T S，et al. Innovative testing technique of rock subjected to coupled static and dynamic loads[J]. International Journal of Rock Mechanics and Mining Sciences，2008，45(5)：739–748.
[3] LI X B，LOK T S，ZHAO J，et al. Oscillation elimination in the hopkinson bar apparatus and resultant complete dynamic stress-strain curves for rocks[J]. International Journal of Rock Mechanics and Mining Sciences，2000，37(7)：1 055–1 060.
[4] 李夕兵，周子龙，叶洲元，等. 岩石动静组合加载力学特性研究[J]. 岩石力学与工程学报，2008，27(7)：1 387–1 395.(LI Xibing，ZHOU Zilong，YE Zhouyuan，et al. Study of rock mechanical characteristics under coupled static and dynamic loads[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(7)：1 387–1 395.(in Chinese))
[5] 李夕兵，宫凤强，ZHAO J，等. 一维动静组合加载下岩石冲击破坏试验研究[J]. 岩石力学与工程学报，2010，29(2)：251–260.(LI Xibing，GONG Fengqiang，ZHAO J，et al. Impact failure characteristics study of rock subjected to 1D coupled static and dynamic loads[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(2)：251–260.(in Chinese))
[6] 宫凤强，李夕兵，刘希灵，等. 一维动静组合加载下砂岩动力学特性的试验研究[J]. 岩石力学与工程学报，2010，29(10)：2 076–2 085. (Gong Fengqiang，LI Xibing，LIU Xiling，et al. Experimentalstudy of dynamic characteristics of sandstone under one dimensinal coupled static and dynamic loads[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(10)：2 076–2 085.(in Chinese))
[7] 左宇军，李夕兵，唐春安，等. 二维动静组合加载下岩石破坏的试验研究[J]. 岩石力学与工程学报，2006，25(9)：1 881–1 820.(ZUO Yujun，LI Xibing，TANG Chun?an，et al. Two-dimensional experimental study activity of rock damage under the combined loads[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(9)：1 881–1 820. (in Chinese))
[8] 宫凤强，李夕兵，刘希灵. 三维动静组合加载下岩石力学特性试验初探[J]. 岩石力学与工程学报，2011，30(6)：1 178–1 190.(GONG Fengqiang，LI Xibing，LIU Xiling. Preliminary experimental study of characteristics of rock subjected to 3D coupled static and dynamic loads[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(6)：1 178–1 190.(in Chinese))
[9] 左宇军，李夕兵，赵国彦，等. 受静载作用的岩石动态断裂的突变模型[J]. 煤炭学报，2004，29(6)：654–658.(ZUO Yujun，LI Xibing，ZHAO Guoyan. A catastrophe model for dynamic fracture of static loaded rock[J]. Journal of China Coal Society，2004，29(6)：654–658.(in Chinese))
[10] 左宇军，李夕兵，马春德，等. 动静组合载荷作用下岩石失稳破坏的突变理论模型与试验研究[J]. 岩石力学与工程学报，2005，24(5)：741–746.(ZUO Yujun，LI Xibing，MA Chunde，et al. Catastrophic model and testing study on failure of static loading rock system under dynamic loading[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(5)：741–746.(in Chinese))
[11] 李夕兵，左宇军，马春德. 中应变率下动静组合加载岩石的本构模型[J]. 岩石力学与工程学报，2006，25(5)：865–874.(LI Xibing，ZUO Yujun，MA Chunde. Constitutive model of rock under coupled static-dynamic loading with intermediate strain rate[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(5)：865–874.(in Chinese))
[12] 金解放，李夕兵，王观石，等. 循环冲击载荷作用下砂岩破坏模式及其机理[J]. 中南大学学报：自然科学版，2012，43(4)：1 453–1 461. (JIN Jiefang，LI Xibing，WANG Guanshi，et al. Failure modes and mechanisms of sandstone under cyclic impact loading[J]. Journal of Central South University：Science and Technology，2012，43(4)：1 453–1 461.(in Chinese))
[13] 金解放，李夕兵，殷志强，等. 循环冲击下波阻抗定义岩石损伤变量的研究[J]. 岩土力学，2011，32(5)：1 385–1 393.(JIN Jiefang，LI Xibing，YIN Zhiqiang，et al. A method for defining rock damage variable by wave impedance under cyclic impact loadings[J]. Rock and Soil Mechanics，2011，32(5)：1 385–1 393.(in Chinese))
[14] 金解放，钟海兵，吴 越，等. 静载荷与循环冲击作用下岩石损伤变量定义方法的选择[J]. 有色金属科学与工程，2013，4(4)：85–90.(JIN Jiefang，ZHONG Haibing，WU Yue，et al. Method selection for defining damage variable of rock subjected to static loadings and cyclic impacts[J]. Nonferrous Metals Science and Engineering，2013，4(4)：85–90.(in Chinese))
[15] ZHU W C，BAI Y，LI X B，et al. Numerical simulation on rock failure under combined static and dynamic loading during SHPB tests[J]. International Journal of Impact Engineering，2012，49：142–157.
[16] LI X B，GONG F Q，TAO M，et al. Failure mechanism and coupled static-dynamic loading theory in deep hard rock mining：A review[J]. Journal of Rock Mechanics and Geotechnical Engineering，2017，9(4)：767–782.
[17] CHEN Z M，LI Y M，ZHANG Z，et al. Experimental study of dynamic mechanical properties of granite[J]. Applied Mechanics and Materials，2017，858：86–90.
[18] XIA K W，YAO W，WU B B，et al. Dynamic rock tensile strengths of Laurentian granite：Experimental observation and micromechanical model[J]. Journal of Rock Mechanics and Geotechnical Engineering，2016，9(1)：116–124.
[19] SANCER J，STREJBAR M，MALENAKOVA A，et al. Effects of cyclic loading on the rheological properties of sandstones[J]. Central European Journal of Geosciences，2011，3(2)：207–214.
[20] TAHERI A，HAMZAH N，DAI Q. Degradation and improvement of mechanical properties of rock under triaxial compressive cyclic loading[J]. Japanese Geotechnical Society Special Publication，2017，5(2)：71–78.
[21] MA L J，LIU X Y，WANG M Y，et al. Experimental investigation of the mechanical properties of rock salt under triaxial cyclic loading[J]. International Journal of Rock Mechanics and Mining Sciences，2013，62：34–41.
[22] LIU Z B，SHAO J F，LIU T G，et al. Gas permeability evolution mechanism during creep of a low permeable claystone[J]. Applied Clay Science，2016，129：47–53.
[23] 王旭升，陈占清. 岩石渗透试验瞬态法的水动力学分析[J]. 岩石力学与工程学报，2006，25(增1)：3 098–3 103.(WANG Xusheng，CHEN Zhanqing. Analysis of the hydrodynamics of transient method of rock penetration test[J]. Journal of Rock Mechanics and Engineering，2006，25(Supp.1)：3 098–3 103.(in Chinese))
[24] 盛金昌，李凤滨，姚德生，等. 渗流–应力–化学耦合作用下岩石裂隙渗透特性试验研究[J]. 岩石力学与工程学报，2012，31(5)：1 016–1 025.(SHENG Jinchang，LI Fengbin，YAO Desheng，et al. Experimental study of seepage properties in rocks fracture under coupled hydro-mechano-chemical process[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(5)：1 016–1 025.(in Chinese))
[25] 樊秀峰，简文彬. 砂岩疲劳特性的超声波速法试验研究[J].岩石力学与工程学报，2008，27(3)：557–563.(FAN Xiufeng，JIAN Wenbin. Experimental research on fatigue characteristics of sandstone using ultrasonic wave velocity method[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(3)：557–563.(in Chinese))
[26] 蒋 宇. 周期载荷作用下岩石疲劳破坏及变形发展规律[硕士学位论文][D]. 上海：上海交通学，2003.(JIANG Yu. Fatigue failure and deformation development law of rock under cyclic load[M. S. Thesis][D]. Shanghai：Shanghai Jiaotong University，2003.(in Chinese))
[27] 周宗红，章雅琦，杨安国，等. 白云岩三维动静组合加载力学特性试验研究[J]. 煤炭学报，2015，40(5)：1 030–1 036.(ZHOU Zonghong，ZHANG Yaqi，YANG Guoan，et al. Experimental Study on 3D mechanical and dynamic loading of dolomites[J]. Journal of China Coal Society，2015，40(5)：1 030–1 036.(in Chinese)) |
|
|
|
2018, Vol. 37 
