二维静载作用下含正交型交叉裂隙岩体动态力学特性研究

doi:10.13722/j.cnki.jrme.2022.1351

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (8103 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要为研究围压对含交叉裂隙岩体的强度特征和破坏规律的影响，考虑裂隙贯通比、初始静载和应变率，基于双轴霍普金森压杆(biaxial Hopkinson pressure bar，BHPB)试验系统开展动静组合加载试验，并借助数字图像相关(digital image correlation，DIC)技术分析试样的变形过程，研究交叉裂隙岩体强度特征、能量耗散规律与断裂特性。研究结果表明：最大主应力方向的动态强度和峰值应变随着最大主应力或应力差的增大而减小，随中间主应力或者应变率的增大而增大，而中间主应力方向的动态应力和峰值应变显示出相反的变化趋势；随着差应力的增大，单位体积损耗能增加；随裂隙贯通比的增大，试样的动态强度减小，能量损耗率显著增加；主次裂隙贯通比决定试样的最终破坏模式，当裂隙贯通比较小时，交叉裂隙试样的起裂–扩展主要受主裂隙控制，当贯通比大于0.67时，主次裂隙相互作用明显，试样形成由主次裂隙、反翼裂纹、共面裂纹组成的多个破裂面；在双向等围压作用下，反翼裂纹在试样主次裂隙尖端贯通，最终呈剪切破坏；在双向不等围压情况下，试样呈现出与最小主应力方向近似垂直的分层剥离成块破坏，整体表现为压剪破坏。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	刘婷婷1
	2
	向昌1
	2
	张超1
	李新平1
	2
	丁鹿阳1
	袁伟3

关键词 ：岩石力学, 交叉裂隙, 双轴霍普金森压杆(BHPB), 动静组合加载, 破坏模式, DIC

Abstract：In order to study the influence of confining pressure on the strength characteristics and failure characteristics of rock mass with cross cracks，considering the influence of crack penetration ratio，initial static load and strain rate，a biaxial dynamic and static combined loading test was carried out by using the biaxial Hopkinson pressure bar(BHPB) test system. The deformation process of the sample was analyzed with the help of digital image correlation(DIC) technology，and the strength characteristics，energy dissipation and fracture properties of cross-jointed rock mass were studied. The research results show that the dynamic strength and peak strain in the direction of the maximum principal stress decrease with the increase of the maximum principal stress or stress difference，but increase with the increase of the intermediate principal stress or strain rate，while the dynamic stress and peak strain in the direction of the intermediate principal stress show the opposite trend. With the increase of the differential stress，the energy loss per unit volume increases. With the increase of the crack penetration ratio，the dynamic strength of the sample decreases，and the energy loss rate increases significantly. The primary and secondary crack penetration ratio determines the final failure mode of the sample，when the penetration ratio of the cracks is small，the crack initiation-expansion of the cross-jointed specimen is mainly controlled by the main cracks. When the penetration ratio is greater than 0.67，the interaction between the primary and secondary cracks is obvious，and the formation of the sample is composed of primary and secondary multiple fracture surfaces composed of anti-wing cracks and coplanar cracks. Under the action of bidirectional constant pressure，the anti-wing cracks penetrate at the tip of the primary and secondary cracks of the sample，and finally show shear failure. Under the two-way unequal confining pressure，the test sample presents delamination，peeling and block failure approximately perpendicular to the direction of the minimum principal stress，and the overall performance is compressive shear failure.

Key words： rock mechanics cross cracks BHPB coupled static and dynamic loads failure mode DIC

引用本文:

刘婷婷1，2，向昌1，2，张超1，李新平1，2，丁鹿阳1，袁伟3. 二维静载作用下含正交型交叉裂隙岩体动态力学特性研究[J]. 岩石力学与工程学报, 2024, 43(2): 371-384.
LIU Tingting1，2，XIANG Chang1，2，ZHANG Chao1，LI Xinping1，2，DING Luyang1，YUAN Wei3. Research on dynamic mechanical properties of rock mass with orthogonal intersecting cracks under two-dimensional static loading. , 2024, 43(2): 371-384.

链接本文:

http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2022.1351 或 http://rockmech.whrsm.ac.cn/CN/Y2024/V43/I2/371

[1]	张波，李术才，杨学英，等. 含交叉裂隙节理岩体单轴压缩破坏机制研究[J]. 岩土力学，2014，35(7)：1 863-1 870.(ZHANG Bo，LI Shucai，YANG Xueying，et al. Uniaxial compression failure mechanism of jointed rock mass with cross-cracks[J]. Rock and Soil Mechanics，2014，35(7)：1 863-1 870.(in Chinese))
[3]	LIU X W，LIU Q S，LIU B，et al. Failure behavior for rocklike material with cross crack under biaxial compression[J]. Journal of Materials in Civil Engineering，2019，31(2)，DOI：10.1061/(ASCE)MT.1943-5533.0002540.
[6]	李夕兵，周子龙，叶州元，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))
[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)：1 179-1 190.(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)：1 179-1 190.(in Chinese))
[11]	XU S L，SHAN J，ZHANG L，et al. Dynamic compression behaviors of concrete under true triaxial confinement：An experimental technique[J]. Mechanics of Materials，2020，140(C)，DOI：10.1016/j.mechmat.2019.103220.
[13]	LIU K，ZHANG Q B，WU G，et al. Dynamic mechanical and fracture behaviour of sandstone under multiaxial loads using a triaxial hopkinson bar[J]. Rock Mechanics and Rock Engineering，2019，52(7)：2 175-2 195.
[9]	宫凤强，李夕兵，刘希灵. 三轴SHPB加载下砂岩力学特性及破坏模式试验研究[J]. 振动与冲击，2012，31(8)：29-32.(GONG Fengqiang，LI Xibing，LIU Xiling. Tests for sandstone mechanical properties and failure model under triaxial SHPB loading[J]. Journal of Vibration and Shock，2012，31(8)：29-32.(in Chinese))
[19]	LI D Y，GAO F，HAN Z，et al. Experimental evaluation on rock failure mechanism with combined flaws in a connected geometry under coupled static-dynamic loads[J]. Soil Dynamics and Earthquake Engineering，2020，132：106088.
[16]	王文，张世威，LIU K，等. 真三轴动静组合加载饱水煤样动态强度特征研究[J]. 岩石力学与工程学报，2019，38(10)：2 010-2 020. (WANG Wen，ZHANG Shiwei，LIU Kai，et al. Experimental study on dynamic strength characteristics of water-saturated coal under true triaxial static-dynamic combination loadings[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(10)：2 010-2 020.(in Chinese))
[18]	李地元，万千荣，朱泉企，等. 不同加载方式下含预制裂隙岩石力学特性及破坏规律试验研究[J]. 采矿与安全工程学报，2021，38(5)：1 025-1 035.(LI Diyuan，WAN Qianrong，ZHU Quanqi，et al. Experimental study on mechanical properties and failure behaviour of fractured rocks under different loading methods[J]. Journal of Mining and Safety Engineering，2021，38(5)：1 025-1 035.(in Chinese))
[21]	WENG L，LI X B，TAHERI A，et al. Fracture evolution around a cavity in brittle rock under uniaxial compression and coupled static-dynamic loads[J]. Rock Mechanics and Rock Engineering，2018，51(2)：531-545.
[23]	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[M]. Cham：Springer International Publishing，2015：35-44.
[26]	BLABER J，ADAIR B，ANTONIOU A. Ncorr：Open-source 2D digital image correlation matlab software[J]. Experimental Mechanics，2015，55(6)：1 105-1 122.
[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 Jian，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))
[7]	WANG W，WANG H，LI D，et al. Strength and failure characteristics of natural and water-saturated coal specimens under static and dynamic loads[J]. Shock and Vibration，2018，2018：1-15.
[15]	LUO Y，GONG H L，HUANG J H，et al. Dynamic cumulative damage characteristics of deep-buried granite from Shuangjiangkou hydropower station under true triaxial constraint[J]. International Journal of IMPact Engineering，2022，165(3)：104215.
[17]	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．Experimental study on mechanical properties and failure laws of granite with an artificial flaw under coupled static and dynamic loads[J]. Chinese Journal of Rock Mechanics and Engineering，2020，39(6)：1 081- 1 093.(in Chinese))
[25]	金爱兵，王树亮，王本鑫，等. 基于DIC的3D打印交叉节理试件破裂机制研究[J]. 岩土力学，2020，41(12)：3 862-3 872.(JIN Aibing，WANG Shuliang，WANG Benxin，et al. Fracture mechanism of specimens with 3D printing cross joint based on DIC technology[J]. Rock and Soil Mechanics，2020，41(12)：3 862-3 872.(in Chinese))
[27]	QIU S，FENG X，ZHANG C，et al. Estimation of rockburst wall-rock velocity invoked by slab flexure sources in deep tunnels[J]. Canadian Geotechnical Journal，2014，51(5)：520-539.
[2]	韩智铭，乔春生，朱举. 含2组交叉贯通节理岩体的强度及破坏特征分析[J]. 岩土力学，2018，39(7)：2 451-2 460.(HAN Zhiming，QIAO Chunsheng，ZHU Ju. Analysis of strength and failure characteristics of rock mass with two sets of cross-persistent joints[J]. Rock and Soil Mechanics，2018，39(7)：2 451-2 460.(in Chinese))
[4]	LIU J M，SUN S R，YUE L，et al. Mechanical and failure characteristics of rock-like material with multiple crossed joint sets under uniaxial compression[J]. Advances in Mechanical Engineering，2017，9(7)：1-18.
[10]	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.
[12]	LIU K，ZHAO J，WU G，et al. Dynamic strength and failure modes of sandstone under biaxial compression[J]. International Journal of Rock Mechanics and Mining Sciences，2020，128(C)，DOI：10.1016/j.ijrmms.2020.104260.
[14]	WANG H C，ZHAO J，LI J，et al. Dynamic mechanical properties and fracturing behaviour of concrete under biaxial compression[J]. Construction and Building Materials，2021，301(4)：124085.
[20]	LI D Y，ZHENYU H，XIAOLEI S，et al. Dynamic mechanical properties and fracturing behavior of marble specimens containing single and double flaws ins SHPB tests[J]. Rock Mechanics and Rock Engineering，2019，52(6)：1 623-1 643.
[22]	LI Y H，PENG J Y，ZHANG F P，et al. Cracking behavior and mechanism of sandstone containing a pre-cut hole under combined static and dynamic loading[J]. Engineering Geology，2016，213：64-73.
[24]	LI J C，YUAN W，LI H，et al. Study on dynamic shear deformation behaviors and test methodology of sawtooth-shaped rock joints under iMPact load[J]. International Journal of Rock Mechanics and Mining Sciences，2022，158，DOI：10.1016/j.ijrmms.2022.105210.