高径比差异条件下花岗岩岩石动态冲击压缩特性

doi:10.13722/j.cnki.jrme.2020.1163

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摘要为研究动态冲击下岩石强度尺寸效应，设计高径比分别为0.5，0.6，0.7，0.8，0.9，1.0，1.2，1.5和2.0的9组花岗岩试样，利用f 50 mm分离式霍普金森杆(SPHB)对花岗岩试样在3组冲击速度下进行动态冲击压缩试验。研究不同高径比的花岗岩试样产生破坏的力学特性，并对破碎后岩样进行吸收能分析。研究结果表明：在3组冲击速度加载下，不同高径比试样的抗压强度最大相差分别为10.88%，3.95%和8.17%；同一冲击速度，抗压强度不随高径比变化而发生明显变化；岩样高径比与峰值应变呈负相关，拟合数据曲线得出两者存在一定的非线性关系；试样高径比与弹性变形模量呈正相关，拟合数据曲线得出两者存在良好的线性关系。动态压缩不同高径比的岩样，其破坏形态有区别，破坏形式基本一致；入射能大小与冲击速度有关，与岩样高径比无关；反射能和透射能与岩样高径比拟合曲线规律相反；岩样破碎的吸收能不随岩样高径比的变化而发生显著变化，岩样单位长度破碎吸收能则随长度增加减小。

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	赵光明1
	2
	周俊1
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	孟祥瑞1
	2
	考四明1
	2
	张若飞1
	2
	黄顺杰1
	2

关键词 ：岩石力学, 强度尺寸效应, 高径比, 花岗岩, 力学特性, 吸收能

Abstract：In order to study the rock strength size effect under dynamic impact，nine groups of granite samples with different length-diameter ratios(0.5，0.6，0.7，0.8，0.9，1.0，1.2，1.5 and 2.0) were prepared，and dynamic impact compression tests were carried out under different impact speeds using f 50 mm split Hopkinson bar (SPHB). The mechanical properties of granite specimens with different length-diameter ratios were studied，and the absorption energy of the broken specimens was analyzed. The results show that，under three impact velocity compression conditions，the maximum differences of the compressive strength of the samples with different length-diameter ratios are 10.88%，3.95% and 8.17%，respectively，and that，under the same impact velocity，the compressive strength does not change obviously with the change of the length-diameter ratio. The length-diameter ratio of the rock specimens is negatively correlated with the peak strain of the rock specimens，and the fitting data curve shows that there is a certain nonlinear relationship between them. The length-diameter ratio of the specimens is positively correlated with the elastic modulus，and the fitting data curve shows that there is a good linear relationship between them. The failure shapes of the rock specimens with different length-diameter ratios are different while the failure forms are basically the same. The magnitude of the incident energy is related to the impact velocity but independent of the length-diameter ratio of the rock specimens. The fitting curves between the reflected energy and the transmitted energy with the length-diameter ratio are contrary. The absorbed energy of rock specimen breakage does not change significantly with the length-diameter ratio，but the absorbed energy per unit length of rock specimen breakage decreases with increasing the length.

Key words： rock mechanics strength size effect length-diameter ratio granite specimen mechanical properties absorbed energy

引用本文:

赵光明1，2，周俊1，2，孟祥瑞1，2，考四明1，2，张若飞1，2，黄顺杰1，2. 高径比差异条件下花岗岩岩石动态冲击压缩特性[J]. 岩石力学与工程学报, 2021, 40(7): 1392-1401.
ZHAO Guangming1，2，ZHOU Jun1，2，MENG Xiangrui1，2，KAO Siming1，2，ZHANG Ruofei1，2，HUANG Shunjie1，2. Dynamic impact compression characteristics of granite rocks with different length-diameter ratios. , 2021, 40(7): 1392-1401.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2020.1163 或 http://rockmech.whrsm.ac.cn/CN/Y2021/V40/I7/1392

[2]	QI C，WANG M，BAI J，et al. Mechanism underlying dynamic size effect on rock mass strength[J]. International Journal of Impact Engineering，2014，68：1-7.
[1]	ELFAHAL M M，KRAUTHAMMER T，OHNO T，et al. Size effect for normal strength concrete cylinders subjected to axial impact[J]. International Journal of Impact Engineering，2005，31(4)：461-481.
[4]	杨圣奇，苏承东，徐卫亚. 岩石材料尺寸效应的试验和理论研究[J].工程力学，2005，(4)：112-118.(YANG Shengqi，SU Chengdong，XU Weiya. Experimental and theoretical study on size effect of rock materials[J]. Engineering Mechanics，2005，(4)：112-118.(in Chinese))
[7]	周国林，谭国焕，李启光，等. 剪切破坏模式下岩石的强度准则[J].岩石力学与工程学报，2001，20(6)：753-762.(ZHOU Guolin，TAN Guohuan，LI Qiguang，et al. Rock strength criteria for shear failure modes[J]. Chinese Journal of Rock Mechanics and Engineering，2001，20(6)：753-762.(in Chinese))
[9]	杜晶. 不同长径比下岩石冲击动力学特性研究[硕士学位论文][D]. 长沙：中南大学，2011：41-44.(DU Jing. Study on rock impact dynamic characteristics under different length-diameter ratios[M. S. Thesis][D]. Changsha：Central South University，2011：41-44.(in Chinese))
[3]	宫凤强，李夕兵，饶秋华，等. 岩石SHPB试验中确定试样尺寸的参考方法[J]. 振动与冲击，2013，32(17)：24-28.(GONG Fengqiang，LI Xibing，RAO Qiuhua，et al. Reference method for determining sample size in rock SHPB test[J]. Vibration and Impact，2013，32(17)：24-28.(in Chinese))
[5]	吕兆兴，冯增朝，赵阳升. 岩石的非均质性对其材料强度尺寸效应的影响[J]. 煤炭学报，2007，44(9)：917-920.(LV Zhaoxing，FENG Zengchao，ZHAO Yangsheng. Effects of rock heterogeneity on the size and strength effect of rock materials[J]. Journal of China Coal Society，2007，44(9)：917-920.(in Chinese))
[6]	潘一山，魏建明. 岩石材料应变软化尺寸效应的实验和理论研究[J]. 岩石力学与工程学报，2002，21(2)：215-218.(PAN Yishan，WEI Jianming. Experimental and theoretical research on strain softening size effect of rock material[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(2)：215-218.(in Chinese)
[8]	李明，茅献彪，曹丽丽，等. 高应变率下煤力学特性试验研究[J]. 采矿与安全工程学报，2015，32(2)：317-324.(LI Ming，MAO Xianbiao，CAO Lili，et al. Experimental study on mechanical properties of coal under high strain rate[J]. Journal of mining and safety engineering，2015，32(2)：317-324.(in Chinese))
[10]	平琦，张号，苏海鹏. 不同长度石灰岩动态压缩力学性质试验研究[J]. 岩石力学与工程学报，2018，37(增2)：3 891-3 897.(PING Qi，ZHANG Hao，SU Haipeng. Experimental study on dynamic compressive Mechanical properties of limestone of different lengths[J]. Chinese Journal of Rock Mechanics and Engineering，2018，37(Supp.2)：3 891-3 897.(in Chinese))
[12]	洪亮. 冲击荷载下岩石强度及破碎能耗特征的尺寸效应研究[博士学位论文][D]. 长沙：中南大学，2008：94-96.(HONG Liang. Study on size effect of rock strength and crushing energy consumption under impact loading[Ph. D. Thesis][D]. Changsha：Central South University，2008：94-96.(in Chinese)
[14]	孟庆彬，韩立军，浦海，等. 应变速率和尺寸效应对岩石能量积聚与耗散影响的试验[J]. 煤炭学报，2015，40(10)：2 386-2 398. (MENG Qingbin，HAN Lijun，PU Hai，et al. Experiment on the influence of strain rate and size effect on energy accumulation and dissipation in rock[J]. Journal of Coal Science，2015，40(10)：2 386- 2 398.(in Chinese))
[16]	王礼立. 应力波基础[M]. 2 版. 北京：国防工业出版社，2010：39-64.(WANG Lili. Foundation of stress waves[M]. 2nd ed. Beijing：National Defense Industry Press，2010：39-64.(in Chinese))
[17]	刘晓辉，张茹，刘建锋. 不同应变率下煤岩冲击动力试验研究[J].煤炭学报，2012，37(9)：1 528-1 534.(LIU Xiaohui，ZHANG Ru，LIU Jianfeng. Experimental study on the impact dynamic of coal and rock under different strain rates[J]. Journal of Coal Science，2012，37(9)：1 528-1 534.(in Chinese))
[19]	LUNDBERG B. A split Hopkinson bar study of energy absorption in dynamic rock fragmentation[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1976，13(6)：187-197.
[21]	平琦，骆轩，马芹永，等. 冲击载荷作用下砂岩试件破碎能耗特征[J]. 岩石力学与工程学报，2015，34(增2)：4 197-4 203.(PING Qi，LUO Xuan，MA Qinyong，et al. Broken energy dissipation characteristics of sandstone specimens under impact loads[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(Supp.2)：4 197-4 203.(in Chinese))
[11]	李地元，肖鹏，李夕兵. 动静态压缩下岩石试样的长径比效应研究[J]. 实验力学，2018，33(1)：93-100.(LI Diyuan，XIAO Peng，LI Xibing. Study on the aspect ratio effect of rock samples under dynamic and static compression[J]. Experimental Mechanics，2018，33(1)：93-100.(in Chinese))
[13]	孟庆彬，韩立军，浦海，等. 尺寸效应和应变速率对岩石力学特性影响的试验研究[J]. 中国矿业大学学报，2016，45(2)：233-243.(MENG Qingbin，HAN Lijun，PU Hai，et al. Experimental study on the effect of size effect and strain rate on rock mechanical properties[J]. Journal of China university of Mining and Technology，2016，45(2)：233-243.(in Chinese))
[15]	刘宁，张春生，褚卫江，等. 深埋隧洞岩爆风险尺寸效应问题探讨[J]. 岩石力学与工程学报，2017，36(10)：2 514-2 521.(LIU Ning，ZHANG Chunsheng，ZHU Weijiang，et al. Discussion on the size effect of rock burst risk in deep tunnel[J]. Chinese Journal of Rock Mechanics and Engineering，2017，36(10)：2 514-2 521.(in Chinese))
[18]	陈瑜，黄永恒，曹平，等. 不同高径比时软岩强度与变形尺寸效应试验研究[J]. 中南大学学报：自然科学版，2010，41(3)：1 073- 1 078.(CHEN Yu，HUANG Yongheng，CAO Ping，et al. Size effect experimental study of strength and deformation in different height- to-diameter ratio soft rocks[J]. Journal of Central South University：Science and Technology，2010，41(3)：1 073-1 078.(in Chinese))
[20]	ZHANG Z X，KOU S Q，JIANG L G，et al. Effects of loading rate on rock fracture：fracture characteristics and energy partitioning[J]. International Journal of Rock Mechanics and Mining Sciences，2000，37(5)：745-762.
[22]	李夕兵. 岩石动力学基础与应用[M]. 北京：科学出版社，2010：19-21.(LI Xibing. Rock dynamics fundamentals and application[M]. Beijing：Science Press，2010：19-21.(in Chinese))