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| Experimental study on failure characteristics of natural and saturated sandstone under true triaxial unloading and dynamic disturbance condition |
| FENG Fan1，2，3，CHEN Shaojie1，WANG Qi2，ROSTAMI J4，KHORESHOK A A5，SHENG Shouqian1，BIAN Zhuang1，DING Yisong1 |
| (1. College of Energy and Mining Engineering，Shandong University of Science and Technology，Qingdao，Shandong 266590，China；2. State Key Laboratory for Geomechanics and Deep Underground Engineering，China University of Mining and Technology (Beijing)，Beijing 100083，China；3. State Key Laboratory of Mining Response and Disaster Prevention and Control in
Deep Coal Mines，Anhui University of Science and Technology，Anhui，Huainan 232001，China；4. Earth Mechanics
Institute，Colorado School of Mines，Golden 80401，USA；5. College of Mining Engineering，
Gorbachev Kuzbass State Technical University，Kemerovo 650000，Russia) |
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Abstract 为探讨不同含水状态红砂岩试样在动静组合状态下的失稳破裂特征，采用QKX-YB200真三轴岩爆试验系统、声发射监测系统以及高速摄像仪对自然和饱水状态下的红砂岩立方体试样开展真三轴卸载–动力扰动试验。研究结果表明：在真三轴卸载–动力扰动条件下，自然状态砂岩破坏模式为张拉–剪切混合型破坏，而饱水状态砂岩的破坏模式为张拉型破坏，不同含水状态砂岩的裂纹扩展程度与初始轴向静应力和动力扰动频率密切相关；相比于饱水状态砂岩，自然状态砂岩试样在动力扰动阶段出现了不同程度的块片弹射和飞溅现象，体现为典型的应变型岩爆特征；轴向静应力以及动力扰动频率对于不同含水状态砂岩的力学响应特征具有显著的差异性，其对于自然状态砂岩的力学响应主要体现为岩样的破坏剧烈程度，而对于饱水状态砂岩的力学响应则主要体现为岩样的破碎程度；对含水砂岩试样建立了真三轴卸载–动力扰动下裂纹扩展模型，认为水楔效应、中间主应力效应以及开挖卸荷效应是诱发饱水砂岩产生张拉型破坏的本质原因；基于室内试验结果，从能量转化、力学、物理以及化学的角度初步揭示了真三轴卸载–动力扰动下水弱化岩爆机制。
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| [1] 朱 凌，裴向军，崔圣华，等. 含脉状缺陷结构岩石循环加卸载损伤及强度特性试验研究[J]. 岩石力学与工程学报，2019，38(5)：900–911.(ZHU Ling，PEI Xiangjun，CUI Shenghua，et al. Experimental study on cycle loading and unloading damage and strength characteristics of rocks with vein defects[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(5)：900–911.(in Chinese))
[2] 赵 奎，冉珊瑚，曾 鹏. 含水率对红砂岩特征应力及声发射特性的影响[J]. 岩土力学，2021，42(4)：899–908.(ZHAO Kui，RAN Shanhu，ZENG Peng. Effect of moisture content on characteristic stress and acoustic emission characteristics of red sandstone[J]. Rock and Soil Mechanics，2021，42(4)：899–908.(in Chinese))
[3] FRID V. Electromagnetic radiation method water-infusion control in rockburst-prone strata[J]. Journal of Applied Geophysics，2000，43(1)：5–13.
[4] HUANG B X，LIU C Y，FU J H，et al. Hydraulic fracturing after water pressure control blasting for increased fracturing[J]. International Journal of Rock Mechanics and Mining Sciences，2011，48(6)：976–983.
[5] 王学滨，宋维源，黄 梅，等. 考虑水致弱化及应变梯度的断层岩爆分析[J]. 岩石力学与工程学报，2004，23(11)：1 815–1 818. (WANG Xuebin，SONG Weiyuan，HUANG Mei，et al. Analysis on fault rockburst considering effects of water weakening and strain gradient[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(11)：1 815–1 818.(in Chinese))
[6] 王 文，张世威，LIU Kai，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))
[7] ZHOU Z L，CAI X，CAO W Z，et al. Influence of water content on mechanical properties of rock in both saturation and drying processes[J]. Rock Mechanics and Rock Engineering，2016，49(8)：3 009–3 025.
[8] 王 斌，赵伏军，尹土兵. 基于饱水岩石静动力学试验的水防治屈曲型岩爆分析[J]. 岩土工程学报，2011，33(12)：1 863–1 869. (WANG Bin，ZHAO Fujun，YIN Tubing. Prevention of buckling rockburst with water based on statics and dynamics experiments on water-saturated rock[J]. Chinese Journal of Geotechnical Engineering，2011，33(12)：1 863–1 869.(in Chinese))
[9] WONG L N Y，MARUVANCHERY V，LIU G. Water effects on rock strength and stiffness degradation[J]. Acta Geotechnica，2016，(11)：713–737.
[10] LI D Y，WONG L N Y，LIU G，et al. Influence of water content and anisotropy on the strength and deformability of low porosity meta-sedimentary rocks under triaxial compression[J]. Engineering Geology，2012，126(1)：46–66.
[11] 郑广辉，许金余，王 鹏，等. 不同饱水度红砂岩静态本构关系及动态力学性能研究[J]. 振动与冲击，2018，37(16)：31–37.(ZHENG Guanghui，XU Jinyu，WANG Peng，et al. Static constitutive relation and dynamic mechanical properties of red sandstone with different water saturation[J]. Journal of Vibration and Shock，2018，37(16)：31–37.(in Chinese))
[12] 王浩宇，许金余，刘 石. 水–动力耦合作用下红砂岩动态强度及破坏机制[J]. 空军工程大学学报：自然科学版，2021，22(4)：99–103.(WANG Haoyu，XU Jinyu，LIU Shi. Study of dynamic strength and failure mechanism of red sandstone under condition of hydrodynamic coupling effect[J]. Journal of Air Force Engineering：Natural Science，2021，22(4)：99–103.(in Chinese))
[13] 王延可. 水–力耦合作用下硬岩的力学特征及岩爆力学特征及岩爆机制研究[硕士学位论文][D]. 成都：成都理工大学，2013.(WANG Yanke. Study on the mechanical property and rock burst mechanism of hard rock under H-M coupling conditions[M. S. Thesis][D]. Chengdu：Chengdu University of Technology，2013.(in Chinese))
[14] 罗丹旎，苏国韶，何宝煜. 不同饱水度花岗岩的真三轴岩爆试验研究[J]. 岩土力学，2019，40(4)：1 331–1 340.(LUO Danni，SU Guoshao，HE Baoyu. True triaxial test on rockburst of granites with different water saturations[J]. Rock and Soil Mechanics，2019，40(4)：1 331–1 340.(in Chinese))
[15] VAN EECKHOUT E M. The mechanisms of strength reduction due to moisture in coal mine shales[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstract，1976，13(1)：61–67.
[16] ZHAO Z H，YANG J，ZHANG D F，et al. Effects of wetting and cyclic wetting-drying on tensile strength of sandstone with a low clay mineral content[J]. Rock Mechanics and Rock Engineering，2017，50(2)：485–491.
[17] ZHOU Z L，CAI X，MA D，et al. Water saturation effects on dynamic fracture behavior of sandstone[J]. International Journal of Rock Mechanics and Mining Sciences，2019，114：46–61.
[18] ZHOU Z L，CAI X，MA D，et al. Dynamic tensile properties of sandstone subjected to wetting and drying cycles[J]. Construction and Building Materials，2018，182：215–232.
[19] FENG F，CHEN S J，WANG Y J，et al. Cracking mechanism and strength criteria evaluation of granite affected by intermediate principal stresses subjected to unloading stress state[J]. International Journal of Rock Mechanics and Mining Sciences，2021，143：10473.
[20] HOEK E，BROWN E. Practical estimates of rock mass strength[J]. International Journal of Rock Mechanics and Mining Sciences，1997，34(8)：1 165–1 186.
[21] 李占金，杨 铭，程豪杰，等. 不同扰动条件下深部岩石真三轴岩爆试验研究[J]. 矿业研究与开发，2021，41(5)：53–58.(LI Zhanjin，YANG Ming，CHENG Haojie，et al. Experimental study on true triaxial rock burst of deep rock under different disturbance conditions[J]. Mining Research and Development，2021，41(5)：53–58.(in Chinese))
[22] LI X B，FENG F，LI D Y，et al. Failure characteristics of granite influenced by sample height-to width ratios and intermediate principal stress under true-triaxial unloading conditions[J]. Rock Mechanics and Rock Engineering，2018，51(5)：1 321–1 345.
[23] 苏国韶，胡李华，冯夏庭，等. 低频周期扰动荷载与静载联合作用下岩爆过程的真三轴试验研究[J]. 岩石力学与工程学报，2016，35(7)：1 309–1 322.(SU Guoshao，HU Lihua，FENG Xiating，et al. True triaxial experimental study of rockburst process under low frequency cyclic disturbance load combined with static load[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(7)：1 309–1 322. (in Chinese))
[24] 李杨杨，张士川，文志杰，等. 循环载荷下煤样能量转化与碎块分布特征[J]. 煤炭学报，2019，44(5)：1 411–1 420.(LI Yangyang，ZHANG Shichuan，WEN Zhijie，et al. Energy conversion and fragment distribution characteristics of coal sample under uniaxial cyclic loading[J]. Journal of China Coal Society，2019，44(5)：1 411–1 420. (in Chinese))
[25] 张艳博，杨 震，姚旭龙，等. 花岗岩巷道岩爆声发射信号及破裂特征实验研究[J]. 煤炭学报，2018，43(1)：95–104.(ZHANG Yanbo，YANG Zhen，YAO Xulong，et al. Experimental study on rockburst acoustic emission signal and fracture characteristics in granite roadway[J]. Journal of China Coal Society，2018，43(1)：95–104.(in Chinese))
[26] ZHAO X G，WANG J，CAI M，et al. Influence of unloading rate on the strainburst characteristics of Beishan granite under true-triaxial unloading conditions[J]. Rock Mechanics and Rock Engineering，2014，47(2)：467–483.
[27] 沙 鹏，伍法权，常金源. 大理岩真三轴卸载强度特征与破坏力学模式[J]. 岩石力学与工程学报，2018，37(9)：2 084–2 092.(SHA Peng，WU Faquan，CHANG Jinyuan. Unloading strength and failure pattern of marble under true triaxial test[J]. Chinese Journal of Rock Mechanics and Engineering，2018，37(9)：2 084–2 092.(in Chinese))
[28] 赵光明，许文松，孟祥瑞，等. 扰动诱发高应力岩体开挖卸荷围岩失稳机制[J]. 煤炭学报，2020，45(3)：936–948.(ZHAO Guangming，XU Wensong，MENG Xiangrui，et al. Instability mechanism of high stress rock mass under excavation and unloading induced by disturbance[J]. Journal of China Coal Society，2020，45(3)：936–948.(in Chinese))
[29] 李夕兵，宫凤强，王少锋，等. 深部硬岩矿山岩爆的动静组合加载力学机制与动力判据[J]. 岩石力学与工程学报，2019，38(4)：708–723.(LI Xibing，GONG Fengqiang，WANG Shaofeng，et al. Coupled static-dynamic loading mechanical mechanism and dynamic criterion of rockburst in deep hard rock mines[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(4)：708–723.(in Chinese))
[30] 谭以安. 岩爆岩石断口扫描电镜分析及岩爆渐进破坏过程[J]. 电子显微学报，1989，8(2)：41–48.(TAN Yian. Analysis of fractured face of rockburst with scanning electron microscope and its progressive failure process[J]. Journal of Chinese Electron Microscopy Society，1989，8(2)：41–48.(in Chinese))
[31] 苏国韶，莫金海，陈智勇，等. 支护时效对岩爆弹射破坏影响的真三轴试验研究[J]. 岩土力学，2017，38(5)：1 243–1 250.(SU Guoshao，MO Jinhai，CHEN Zhiyong，et al. True triaxial test study of the influence of support failure on rockburst ejection[J]. Rock and Soil Mechanics，2017，38(5)：1 243–1 250.(in Chinese))
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2022, Vol. 41 
