动荷载与地应力对岩石响应特性的影响试验研究

doi:10.13722/j.cnki.jrme.2021.0093

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Abstract In the blasting process of underground rock mass，the geo-stresses and dynamic loads are different at different distances from the blasting source，which leads to different response characteristics of rocks. In order to study the influence of dynamic loads on the dynamic strength and deformation characteristics of rocks with different geo-stresses，a modified SHPB test device was used to carry out three-dimensional dynamic compression test on red sandstone by setting five impact velocities and five axial static stress levels respectively to simulate different dynamic loads and geo-stresses. The variation rules of average strain rate，dynamic peak stress(or dynamic compressive strength)，ultimate strain and dynamic deformation modulus of red sandstone under different impact velocities and static stress conditions were analyzed respectively，and the evolution empirical models of dynamic response parameters of red sandstone were built to characterize the dynamic response characteristics of rocks. The results show that：(1) the strain rate of red sandstone is affected by the impact velocity and the static stress，and the average strain rate decreases first and then increases with increasing the axial static stress and increases as a power function with the impact velocity，(2) under the same three-dimensional static load，the peak stress and ultimate strain of red sandstone increase by a power function with the impact velocity，(3) under the same impact velocity，with increasing the axial static stress，the peak stress of red sandstone increases as a power function and the ultimate strain also gradually increases，and (4) with increasing the axial static stress，the critical impact velocity and dynamic compression strength of red sandstone both increase first and then decrease. The research results are beneficial to the perfection of rock dynamics theory and the prediction of the response characteristics and stability of surrounding rock mass according to the type and amount of explosives in engineering blasting.

Key words： rock dynamic mechanics impact velocity three dimensional static stress dynamic compression strength ultimate strain

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	Articles by authors
	JIN Jiefang
	YANG Yi
	LIAO Zhanxiang
	YU Xiong
	ZHONG Yilu

Cite this article:

JIN Jiefang,YANG Yi,LIAO Zhanxiang, et al. Effect of dynamic loads and geo-stresses on response characteristics of rocks[J]. , 2021, 40(10): 1990-2002.

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http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2021.0093 OR http://rockmech.whrsm.ac.cn/EN/Y2021/V40/I10/1990

[5]	夏开文，王帅，徐颖，等. 深部岩石动力学实验研究进展[J]. 岩石力学与工程学报，2021，40(3)：448-475.(XIA Kaiwen，WANG Shuai，XU Yin，et al. Advances in experimental studies for deep rock dynamics[J]. Chinese Journal of Rock Mechanics and Engineering，2021，40(3)：448-475.(in Chinese))
[14]	李夕兵，宫凤强，高科，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，GAO Ke，et al. Test study of impact failure of rock subjected to one-dimensional coupled static and dynamic loads[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(2)：251-260.(in Chinese))
[2]	许金余，刘石. 加载速率对高温后大理岩动态力学性能的影响研究[J]. 岩土工程学报，2013，35(5)：879-883.(XU Jinyu，LIU Shi. Effect of impact velocity on dynamic mechnaical behaviors of marble after high temperatures[J]. Chinese Journal of Geotechnical Engineering，2013，35(5)：879-883.(in Chinese))
[4]	XU Y，DAI F. Dynamic response and failure mechanism of brittle rocks under combined compression-shear loading experiments[J]. Rock Mechanics and Rock Engineering，2018，51(3)：747-764.
[7]	XU Y，DAI F，DU H B. Experimental and numerical studies on compression-shear behaviors of brittle rocks subjected to combined static-dynamic loading[J]. International Journal of Mechanical Sciences，2020，175：105-122.
[9]	尤业超，李二兵，谭跃虎，等. 基于能量耗散原理的盐岩动力特性及破坏特征分析[J]. 岩石力学与工程学报，2017，36(4)：843-851. (YOU Yechao，LI Erbing，TAN Yuehu，et al. Analysis on dynamic properties and failure characteristics of salt rock based on energy dissipation principle[J]. Chinese Journal of Rock Mechanics and Engineering，2017，36(4)：843-851.(in Chinese))
[11]	叶洲元，李夕兵，周子龙，等. 三轴压缩岩石动静组合强度及变形特征的研究[J]. 岩土力学，2009，30(7)：1 981-1 986.(YE Zhouyuan，LI Xibing，ZHOU Zilong，et al. Static-dynamic coupling strength and deformation characteristics of rock under triaxial compression[J]. Rock and Soil Mechanics，2009，30(7)：1 981-1 986.(in Chinese))
[16]	GONG F Q，SI X F，LI X B，et al. Dynamic triaxial compression tests on sandstone at high strain rates and low confining pressures with split Hopkinson pressure bar[J]. International Journal of Rock Mechanics and Mining Sciences，2019，113：211-219.
[18]	DU H B，DAI F，LIU Y，et al. Dynamic response and failure mechanism of hydrostatically pressurized rocks subjected to high loading rate impacting[J]. Soil Dynamics and Earthquake Engineering，2020，129：105927.
[20]	ZHOU Y X，XIA K，LI X B，et al. Suggested methods for determining the dynamic strength parameters and mode-I fracture toughness of rock materials[J]. International Journal of Rock Mechanics and Mining Sciences，2012，49：105-112.
[1]	ZHOU Zilong，CAI Xin，ZHAO Yuan，et al. Strength characteristics of dry and saturated rock at different strain rates[J]. Transactions of Nonferrous Metals Society of China，2016，26(7)：1 919-1 925.
[3]	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.
[6]	JIN J F，YUAN W，WU Y，et al. Effects of axial static stress on stress wave propagation in rock considering porosity compaction and damage evolution[J]. Journal of Central South University，2020，27(2)：592-607.
[8]	王文，李化敏，袁瑞甫，等. 动静组合加载含水煤样的力学特征及细观力学分析[J]. 煤炭学报，2016，41(3)：611-617.(WANG Wen，LI Huamin，YUAN Ruifu，et al. Micromechanics analysis and mechanical characteristics of water-saturated coal samples under coupled static-dynamic loads[J]. Journal of China Coal Society，2016，41(3)：611-617.(in Chinese))
[10]	李地元，胡楚维，朱泉企. 预制裂隙花岗岩动静组合加载力学特性和破坏规律试验研究[J]. 岩石力学与工程学报，2020，39(6)：1 081-1 093.(LI Diyuan，HU Chuwei，ZHU Quanqi. Analysis on dynamic properties and failure characteristics of salt rock based on energy dissipation principle[J]. Chinese Journal of Rock Mechanics and Engineering，2020，39(6)：1 081-1 093.(in Chinese))
[13]	金解放，李夕兵，钟海兵. 三维静载与循环冲击组合作用下砂岩动态力学特性研究[J]. 岩石力学与工程学报，2013，32(7)：1 358-1 372. (JIN Jiefang，LI Xibing，ZHONG Haibing. Study of dynamic mechanical characteristic of sandstone subjected to three-dimensional coupled static-cyclic impact loadings[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(7)：1 358-1 372.(in Chinese))
[15]	李晓锋，李海波，刘凯，等. 冲击荷载作用下岩石动态力学特性及破裂特征研究[J]. 岩石力学与工程学报，2017，36(10)：2 393-2 405.(LI Xiaofeng，LI Haibo，LIU Kai，et al. Dynamic properties and fracture characteristics of rocks subject to impact loading[J]. Chinese Journal of Rock Mechanics and Engineering，2017，36(10)：2 393-2 405.(in Chinese))
[17]	周子龙，蔡鑫，周静，等. 不同加载率下水饱和砂岩的力学特性研究[J]. 岩石力学与工程学报，2018，37(2)：4 069-4 075.(ZHOU Zilong，CAI Xin，ZHOU Jing，et al. Mechanical properties of saturated sandstone under different loading rates[J]. Chinese Journal of Rock Mechanics and Engineering，2018，37(2)：4 069-4 075.(in Chinese))
[19]	金解放，程昀，昌晓旭，等. 轴向静载对红砂岩中应力波传播特性的影响试验研究[J]. 岩石力学与工程学报，2017，36(8)：1 939-1 950.(JIN Jiefang，CHEN Yun，CHANG Xiaoxu，et al. Experimental study on stress wave propagation characteristics in red sandstone under axial static stress[J]. Chinese Journal of Rock Mechanics and Engineering，2017，36(8)：1 939-1 950.(in Chinese))
[22]	WANG P，YIN T B，LI X B，et al. Dynamic properties of thermally treated granite subjected to cyclic impact loading[J]. Rock Mechanics and Rock Engineering，2019，52(4)：991-1 010.
[12]	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 Anguo，et al. Experimental study on mechanical characteristics of dolomite under three-dimensional coupled static- dynamic loading[J]. Journal of China Coal Society，2015，40(5)：1 030-1 036.(in Chinese))
[21]	金解放，吴越，张睿，等. 冲击速度和轴向静载对红砂岩破碎及能耗的影响[J]. 爆炸与冲击，2020，40(10)：42-55.(JIN Jiefang，WU Yue，ZHANG Rui，et al. Effect of impact velocity and axial static stress on fragmentation and energy dissipation of red sandstone[J]. Explosion and Shock Waves，2020，40(10)：42-55.(in Chinese))