节理角度对岩石材料的动态响应影响研究

doi:10.13722/j.cnki.jrme.2020.0829

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摘要为探究一维动载下节理角度差异对岩石动态响应的影响规律，利用分离式霍普金森压杆(SHPB)对预制完整试件及7组不同节理角度的水泥砂浆试件进行冲击试验；试验前后利用核磁共振成像(NMR)系统对试件的孔隙度及孔径分布进行检测。从动态强度、能量耗散和细观损伤等方面系统地分析节理角度对类岩石材料动态响应特征的影响规律，结果表明：节理角度由0°增加至90°时，试件峰值强度呈先降后升的变化趋势，当节理角度处于45°～60°时，相对于其他节理角度试件更容易发生破坏；试件的能量吸收情况与损伤呈正相关，试件的孔隙变化率与能量吸收情况均随节理角度增加呈倒“U”型变化，节理角度45°～60°范围内试件吸收能量最多，冲击前后孔隙变化率最为突出，可知荷载最有利于破碎的作用方向与节理成角为30°～45°。

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	潘博1
	汪旭光1
	徐振洋2
	郭连军2
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	李小帅2

关键词 ：岩石力学, 节理角度, 分离式霍普金森压杆(SHPB), 能量耗散, 核磁共振成像(NMR), 细观损伤

Abstract：To explore the influence of the joint angle on the dynamic responses of rocks under one-dimensional dynamic load，the split Hopkinson pressure bar(SHPB) was used to carry out impact tests on prefabricated complete specimens and 7 groups of cement mortar specimens with different joint angles. Before and after the tests，nuclear magnetic resonance(NMR) imaging system was used to detect the porosity and pore size distribution of the samples. The influence of the joint angle on the dynamic response characteristics of rock-like materials was systematically analyzed from the aspects of dynamic strength，energy dissipation and meso-damage. The results show that the peak strength of the specimens first decreases and then increases when the joint angle increases from 0° to 90°. The specimens with a joint angle ranging between 45° and 60°are more likely to be damaged than those with other joint angles. The damage of the specimens is positively related to energy absorption. Both the porosity rate and the energy absorption of the specimens present an inverted “U” shape with the joint angle. The specimens with a joint angle ranging from 45° to 60° absorb the most energy，and the change rate of the porosity before and after impact is the most significant. It is concluded that the angle between the directions of the load and the joint，most conducive to crushing，is 30°–45°.

Key words： rock mechanics joint angle split Hopkinson pressure bar(SHPB) energy dissipation nuclear magnetic resonance(NMR) mesoscopic damage

引用本文:

潘博1，汪旭光1，徐振洋2，郭连军2，3，李小帅2. 节理角度对岩石材料的动态响应影响研究[J]. 岩石力学与工程学报, 2021, 40(3): 566-575.
PAN Bo1，WANG Xuguang1，XU Zhenyang2，GUO Lianjun2，3，LI Xiaoshuai2. Research on the effect of joint angle on dynamic responses of rock materials. , 2021, 40(3): 566-575.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2020.0829 或 http://rockmech.whrsm.ac.cn/CN/Y2021/V40/I3/566

[2]	NIHEI K T，YI W D，MYER L R，et al. Fracture channel waves[J]. Journal of Geophysical Research，1999，104(B3)：4 769-4 781.
[3]	ZHAO X B，ZHAO J，HEFNY A M，et al. Normal transmission of S-wave across parallel fractures with coulomb slip behavior[J]. Journal of Engineering Mechanics，2006，132(6)：641-650.
[13]	刘红岩，王新生，张力民，等. 非贯通节理岩体单轴压缩动态损伤本构模型[J]. 岩土工程学报，2016，38(3)：426-436.(LIU Hongyan，WANG Xinsheng，ZHANG Limin，et al. A dynamic damage constitutive model for rock mass with non-persistent joints under uniaxial compression[J]. Chinese Journal of Geotechnical Engineering，2016，38(3)：426-436.(in Chinese))
[6]	张继春，钮强，徐小荷. 用灰关联分析方法确定影响岩体爆破质量的主要因素[J]. 爆炸与冲击，1993，(3)：212-218.(ZHANG Jichun，NIU Qiang，XU Xiaohe. Determination of principal factors affecting the quality of rock blasting with grey correlation analysis[J]. Explosion and Shock Wave，1993，(3)：212-218.(in Chinese))
[7]	张继春. 节理岩体爆破的损伤机制及其块度模型[J]. 中国有色金属学报，1999，(3)：3-5.(ZHANG Jichun. Damage mechanism of blasting in jointed rock masses and its fragment-size model[J]. The Chinese Journal of Nonferrous Metals，1999，(3)：3-5.(in Chinese))
[9]	TSUBOTA Y，IWAKOKE Y，YOSHINAKA R，et al. Dynamic mechanical properties of rock joints under cyclic loading using ryoke gneiss[C]// ISRM International Symposium—8th Asian Rock Mechanics Symposium. [S. l.]：[s. n.]，2014：741-748.
[10]	NIKTABAR S M M，RAO K S，SHRIVASTAVA A K. Effect of rock joint roughness on its cyclic shear behavior[J]. Journal of Rock Mechanics and Geotechnical Engineering，2017，9(6)：1 071-1 084.
[1]	王明洋，钱七虎. 爆炸应力波通过节理裂隙带的衰减规律[J]. 岩土工程学报，1995，(2)：42-46.(WANG Mingyang，QIAN Qihu. Attenuation law of explosive wave propagation in cracks[J]. Chinese Journal of Geotechnical Engineering，1995，(2)：42-46.(in Chinese))
[5]	KAWAMOTO T，ICHIKAWA Y，KYOYA T. Deformation and fracturting behaviour of discontinuous rock mass and damage mechanics theory[J]. International Journal for Numerical and Analytical Methods in Geomechanics，1988，12(1)：1-30.
[8]	鞠杨，李业学，谢和平，等. 节理岩石的应力波动与能量耗散[J].岩石力学与工程学报，2006，25(12)：2 426-2 434.(JU Yang，LI Yexue，XIE Heping，et al. Stress wave propagation and energy dissipation in jointed rocks[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(12)：2 426-2 434.(in Chinese))
[12]	刘红岩，邓正定，王新生，等.节理岩体动态破坏的SHPB相似材料试验研究[J]. 岩士力学，2014，35(3)：659-665.(LIU Hongyan，DENG Zhengding，WANG Xinsheng，et al. Similar material test study of dynamic failure of jointed rock mass with SHPB[J]. Rock and Soil Mechanics，2014，35(3)：659-665.(in Chinese))
[15]	EBERHARDT E，STEAD D，STIMPSON B. Quantifying progressive pre-peak brittle fracture damage in rock during uniaxial compression[J]. International Journal of Rock Mechanics and Mining Sciences，1999，36(3)：361-380.
[16]	DAI B，ZHAO G Y，KONIETZKY H，et al. Experimental investigation on damage evolution behaviour of a granitic rock under loading and unloading[J]. Journal of Central South University，2018，25(5)：1 213-1 225.
[18]	LIN Y，ZHOU K P，LI J L，et al. Weakening laws of mechanical properties of sandstone under the effect of chemical corrosion[J]. Rock Mechanics and Rock Engineering，2020，53：1 857-1 877.
[20]	李夕兵. 岩石动力学基础与应用[M]. 北京：科学出版社，2014：258-287.(LI Xibing. Rock Dynamics：Fundamentals and applications[M]. Beijing：Science Press，2014：258-287.(in Chinese))
[22]	LI Y X，LIU J F，QIN L. Experimental study on rule of energy dissipation of stress wave across rock joint[J]. Journal of Experimental Mechanics，2011，26(1)：85-90.
[11]	WALTON G，ALEJANO L R，ARZUA J，et al. Crack damage parameters and dilatancy of artificially jointed granite samples under triaxial compression[J]. Rock Mechanics and Rock Engineering，2018，51(6)：1 637-1 656.
[14]	李祥龙，王建国，张智宇，等. 应变率及节理倾角对岩石模拟材料动力特性的影响[J]. 爆炸与冲击，2016，36(4)：483-490.(LI Xianglong，WANG Jianguo，ZHANG Zhiyu，et al. Experimental study for effects of strain rates and joint angles on dynamic responses of simulated rock materials[J]. Explosion and Shock Wave，2016，36(4)：483-490.(in Chinese))
[17]	李夕兵，翁磊，谢晓锋，等. 动静载荷作用下含孔洞硬岩损伤演化的核磁共振特性试验研究[J]. 岩石力学与工程学报，2015，34(10)：1 985-1 993.(LI Xibing，WENG Lei，XIE Xiaofeng，et al. Study on the degradation of hard rock with a pre-existing opening under static-dynamic loadings using nuclear magnetic resonance technique[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(10)：1 985-1 993.(in Chinese))
[19]	YANG Z H，FAN C J，LAN T W，et al. Dynamic mechanical and microstructural properties of outburst-prone coal based on compressive SHPB tests[J]. Energies，2019，12(22)：4 236.
[21]	赵国彦，李振阳，吴浩，等. 含非贯通裂隙砂岩的动力破坏特性研究[J]. 岩土力学，2019，40(增1)：73-81.(ZHAO Guoyan，LI Zhenyang，WU Hao，et al. Dynamic failure characteristics of sandstone with non-penetrating cracks[J]. Rock and Soil Mechanics，2019，40(Supp.1)：73-81.(in Chinese))
[4]	KACHANOV L. Time of the rupture process under creep conditions[J]. USSR Division of Engineering Science，1958，8(1)：26-31.