董平,刘婷婷,李新平,丁鹿阳,王刚

• 1:武汉理工大学土木工程与建筑学院
• 2:武汉理工大学道路桥梁与结构工程湖北省重点实验室
• 3:武汉理工大学三亚科教创新园

摘要(Abstract)：

地应力作用下节理岩体的动态力学特性及对应力波传播规律的影响对深部地下工程的稳定性有着重要影响,采用颗粒流离散元软件(PFC~(2D))建立了含非贯通节理岩体的冲击作用数值模型,并通过与室内试验的对比验证了模型的有效性。通过对不同节理倾角、节理长度非贯通节理岩体的冲击压缩仿真试验,分析了岩体的变形特征、破坏模式及应力波传播规律。结果表明:随节理倾角从15°增加至75°,岩石强度呈现先减小后增大的近"V"字型变化规律,节理试件始终处于拉伸主导作用下,并在45°倾角时拉伸作用最为明显;随着节理长度的增大,岩体的初始损伤增大,动态抗压强度减小。15～25 mm"短"节理试件的贯通破坏由反翼裂纹主导,而30～35 mm"长"节理试件是在反翼裂纹和共面裂纹共同作用下断裂破坏。

关键词(KeyWords)： 颗粒流离散元;动态响应;应力波传播;破坏模式;非贯通节理

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51774222、52079102);; 三亚崖州湾科技城管理局重大科技项目(SKJC-KJ-2019KY02)

作者(Author): 董平,刘婷婷,李新平,丁鹿阳,王刚

参考文献(References)：

• [1] WU N,ZHU Z D,ZHANG C,et al.Dynamic behavior of rock joint under different impact loads[J].KSCE Journal of Civil Engineering,2019,23(2):541-548.
• [2] WU N,ZHANG C,MAIMATIYUSUPU S,et al.Investigation on properties of rock joint in compression dynamic Test[J].KSCE Journal of Civil Engineering,2019,23(9):3854-3863.
• [3] 马芹永，苏晴晴，马冬冬，等.含不同节理倾角深部巷道砂岩SHPB动态力学破坏特性试验研究[J].岩石力学与工程学报，2020,39(6):1104-1116.[3] MA Qin-yong,SU Qing-qing,MA Dong-dong,et al.SHPB experimental study on dynamic characteristics and failure behaviors of sandstone containing weakly filled joints with various angles in deep roadways[J].Chinese Journal of Rock Mechanics and Engineering,2020,39(6):1104-1116.(in Chinese)
• [4] 薄英鋆，王华宁，蒋明镜.深部节理岩体开挖卸荷动力破坏机制的离散元研究[J].岩土工程学报，2020,42(S2):196-201.[4] BO Ying-jun,WANG Hua-ning,JIANG Ming-jing.Cracking mechanism of deep jointed rock mass induced by transient excavation via DEM[J].Chinese Journal of Geotechnical Engineering,2020,42(S2):196-201.(in Chinese)
• [5] 赵怡晴，刘佳伟，金爱兵，等.加卸荷条件下非贯通节理岩体破坏特性研究[J].中南大学学报(自然科学版),2020,51(7):1893-1901.[5] ZHAO Yi-qing,LIU Jia-wei,JIN Ai-bing,et al.Study on failure characteristics of intermittent jointed rock mass under loading and unloading condition[J].Journal of Central South University (Science and Technology),2020,51(7):1893-1901.(in Chinese)
• [6] 张雨霏，李建春，闫亚涛，等.基于SHPB试验的粗糙节理面动态损伤特征研究[J].岩土力学，2021,42(2):491-500.[6] ZHANG Yu-fei,LI Jian-chun,YAN Ya-tao,et al.Experimental study on dynamic damage characteristics of roughness joint surface based on SHPB[J].Rock and Soil Mechanics,2021,42(2):491-500.(in Chinese)
• [7] HUANG X L,QI S W,WILLIAMS A,et al.Numerical simulation of stress wave propagating through filled joints by particle model[J].International Journal of Solids and Structures,2015,69-70:23-33.
• [8] DAI F,XIA K,ZHENG H,et al.Determination of dynamic rock mode-Ⅰ fracture parameters using cracked chevron notched semi-circular bend specimen[J].Engineering Fracture Mechanic,2011,78(15):2633-2644.
• [9] DAI F,CHEN R,IQBAL M J,et al.Dynamic cracked chevron notched Brazilian disc method for measuring rock fracture parameters[J].International Journal of Rock Mechanics and Mining Sciences,2010,47(4):606- 613.
• [10] LI H B,LIU T T,LIU Y Q,et al.Numerical modeling of wave transmission across rock masses with nonlinear joints[J].Rock Mechanics and Rock Engineering,2016,49(3):1115-1121.
• [11] 王奇智，夏开文，吴帮标，等.预制平行双节理类岩石材料板动态破坏试验研究[J].天津大学学报(自然科学与工程技术版),2019,52(10):1099-1108.[11] WANG Qi-zhi,XIA Kai-wen,WU Bang-biao,et al.Dynamic failure of simulated rock mass plate containing two parallel cracks[J].Journal of Tianjin University (Science and Technology),2019,52(10):1099-1108.(in Chinese)
• [12] ZOU C J,WONG L N Y.Experimental studies on cracking processes and failure in marble under dynamic loading[J].Engineering Geology,2014,173:19-31.
• [13] ZOU C J,WONG L N Y,LOO J J,et al.Different mechanical and cracking behaviors of single-flawed brittle gypsum specimens under dynamic and quasi-static loadings[J].Engineering Geology,2016,201:71-84.
• [14] XIA L,ZENG Y W.Parametric study of smooth joint parameters on the mechanical behavior of transversely isotropic rocks and research on calibration method[J].Computers & Geotechnics,2018,98:1-7.
• [15] MA L J,LI Z,LIU J G,et al.Mechanical properties of coral concrete subjected to uniaxial dynamic compression[J].Construction Building Materials,2019,199:244-255.
• [16] HART R,CUNDALL P A,LEMOS J.Formulation of a three-dimensional distinct element model-Part I.A scheme to detect and represent contacts in a system composed of many polyhedral blocks[J].International Journal of Rock Mechanics & Mining Sciences & Geomechanics Abstracts,1988,25(3):117-125.
• [17] DAI F,SHENG H,XIA K W,et al.Some fundamental issues in dynamic compression and tension tests of rocks using split Hopkinson pressure bar[J].Rock Mechanics & Rock Engineering,2010,43(6):657- 666.
• [18] WANG G,LUO Y,LI X P,et al.Study on dynamic mechanical properties and meso-deterioration mechanism of sandstone under cyclic impact load[J].Arabian Journal for Science and Engineering,2020,45(5):3863-3875.
• [19] YANG B D,JIAO Y,LEI S T.A study on the effects of microparameters on macroproperties for specimens created by bonded particles[J].Engineering Computations,2006,23(6):607–631.
• [20] 刘运思，何楚韶，傅鹤林，等.冲击荷载下饱水板岩拉伸力学特性及能耗规律[J].岩石力学与工程学报，2020,39(11):2226-2233.[20] LIU Yun-si,HE Chu-shao,FU He-lin,et al.Study on tensile mechanical properties and energy consumption law of saturated slate under impact loads[J].Chinese Journal of Rock Mechanics and Engineering,2020,39(11):2226-2233.(in Chinese)
• [21] 潘博，汪旭光，徐振洋，等.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.[21] PAN Bo,WANG Xu-Guang,XU Zhen-yang,et al.Research on the effect of joint angle on dynamic responses of rock materials[J].Chinese Journal of Rock Mechanics and Engineering,2021,40(3):566-575.(in Chinese)
• [22] 温森，赵现伟，常玉林，等.基于SHPB的复合岩样动态压缩破坏能量耗散分析[J].应用基础与工程科学学报，2021,29(2):483- 492.[22] WEN Sen,ZHAO Xian-wei,CHANG Yu-lin,et al.Energy dissipation of dynamic failure of mixed rock specimens subject to SHPB compression[J].Journal of Basic Science and Engineering,2021,29(2):483- 492.(in Chinese)