水压–应力耦合作用下砂岩应力松弛特性试验研究

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (8743 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要基于三维数字图像相关技术，采用可视化三轴压缩伺服控制试验系统，开展孔隙水压–应力耦合作用下砂岩应力松弛特性试验研究。结果表明：(1) 径向应变场中局部微裂纹损伤发育并相互贯通是引起脆性岩石应力松弛时效失稳破坏的主控因素。(2) 松弛应力水平位于岩石微裂纹稳定发育和微裂纹不稳定发育阶段时，孔隙水压的增加，能显著提高岩石的应力松弛量和径向应变变化量，缩短岩石时效破坏寿命。(3) 松弛破坏试样应力–时间曲线和径向应变–时间曲线呈“阶梯式”变化趋势，及两者的速率–时间曲线呈现“漏斗形”演化趋势，其实质均反映了岩石应力松弛过程中微裂纹损伤发育扩展和相互贯通。(4) 松弛破坏试样破裂面裂纹发育以沿晶裂纹为主，且相互之间汇集、贯通，胶结基质破碎严重，胶结结构丧失，脆性岩石应力松弛时效破坏实质是受裂纹发育扩展所控制。

	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
	陈灿灿1
	2
	3
	4
	彭守建2
	许江2
	汤杨5
	尚德磊1
	3
	4

关键词 ：岩石力学, 砂岩, 应力松弛, 3D-DIC, 应变场, 孔隙水压

Abstract：Based on three-dimensional digital image correlation technology and adopting a transparent triaxial compression servo-control system，the stress relaxation characteristics of sandstone under the coupling action of pore-water pressure and stress are studied. The temporal and spatial evolution of the strain field in rock surfaces，the stress relaxation curve and micro-morphology of fracture surfaces are analyzed. The results show that：(1) The development and interpenetration of local micro-cracks in the radial strain field are the main controlling factor that causes the failure of brittle rock during stress relaxation. (2) When the relaxation stress level is at the stages of stable and unstable development of micro-cracks inside the rock，the increase of the pore-water pressure can significantly increase the stress relaxation variation and the radial strain change，and shorten the aging failure life of the rock. (3) Both the stress-time curve and the radial strain-time curve of the relaxation failure specimen show a “stepped” trend，and their rate-time curves present a “funnel-shaped”evolution trend，which essentially reflects the development，propagation and interconnection of micro-cracks during the process of stress relaxation. (4) The crack development on the fracture surface of the relaxation failure sample is dominated by intergranular cracks，which converge and connect with each other. The cemented matrix is seriously broken and the cemented structure is lost. The essence of stress relaxation failure of brittle rock is controlled by crack development and propagation.

Key words： rock mechanics sandstone stress relaxation three-dimensional digital image correlation strain field pore-water pressure

引用本文:

陈灿灿1，2，3，4，彭守建2，许江2，汤杨5，尚德磊1，3，4 . 水压–应力耦合作用下砂岩应力松弛特性试验研究[J]. 岩石力学与工程学报, 2022, 41(6): 1193-1207.
CHEN Cancan1，2，3，4，PENG Shoujian2，XU Jiang2，TANG Yang5，SHANG Delei1，3，4. Experimental study of stress relaxation characteristics of sandstone under stress and pore-water pressure coupling. , 2022, 41(6): 1193-1207.

链接本文:

http://rockmech.whrsm.ac.cn/CN/Y2022/V41/I6/1193

[22]	大久保诚介，汤杨，许江，等. 3D-DIC系统在岩石力学试验中的应用[J]. 岩土力学，2019，40(8)：1-11.(OKUBO S，TANG Yang，XU Jiang，et al. Application of 3D-DIC system in rock mechanic test[J]. Rock and Soil Mechanics，2019，40(8)：1-11.(in Chinese))
[28]	LIN M L，JENG F S，TSAI L S，et al. Wetting weaking of tertiary sandstones-mircoscopic mechanism[J]. Environment Geology，2005，48：265-275.
[1]	刘志勇，肖明砾，谢红强，等. 基于损伤演化的片岩应力松弛特性[J]. 岩土力学，2016，37(增1)：101-107.(LIU Zhiyong，XIAO Mingli，XIE Hongqiang，et al. Stress relaxation properties of schist based on damage evolution[J]. Rock and Soil Mechanics，2016，37(Supp.1)：101-107.(in Chinese))
[3]	于怀昌，赵阳，刘汉东，等. 三轴应力作用下水对岩石应力松弛特性影响作用试验研究[J]. 岩石力学与工程学报，2015，34(2)：313-322.(YU Huaichang，ZHAO Yang，LIU Handong，et al. Experimental study of influence of water on stress relaxation of rock under triaxial stresses[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(2)：313-322.(in Chinese))
[6]	TIAN H M，CHEN W Z，YANG D S，et al. Relaxation behavior of argillaceous sandstone under high confining pressure[J]. International Journal of Rock Mechanics and Mining Sciences，2016，88：151-156.
[7]	伍向阳. 岩石的应力松弛、应变硬化和应变软化[J]. 地球物理学进展，1996，11(4)：71-76.(WU Xiangyang. Stress relaxation，strain hardening and strain softening in rocks[J]. Progress in Geophysics，1996，11(4)：71-76.(in Chinese))
[9]	唐礼忠，潘长良. 岩石在峰值荷载变形条件下的松弛试验研究[J]. 岩土力学，2003，24(6)：940-942.(TANG Lizhong，PAN Changliang. Experiment study on properties of stress relaxation of rock under deformation at peak load[J]. Rock and Soil Mechanics，2003，24(6)：940-942.(in Chinese))
[11]	孙钧. 岩土材料流变及其工程应用[M]. 北京：中国建筑工业出版社，1999：406-410.(SUN Jun. The rheology and engineering application of the geotechnical material[M]. Beijing：China Architecture and Building Press，1999：406-410.(in Chinese))
[13]	李铀，朱维申，白世伟，等. 风干与饱水状态下花岗岩单轴流变特性试验研究[J]. 岩石力学与工程学报，2003，22(10)：1 673-1 677. (LI You，ZHU Weishen，BAI Shiwei，et al. Uniaxial experimental study on rheological properties of granite in air-dried and saturated states[J]. Chinese Journal of Rock Mechanics and Engineering，2003，22(10)：1 673-1 677.(in Chinese))
[16]	王学滨，侯文腾，潘一山，等. 基于数字图像相关方法的单轴压缩煤样应变局部化过程试验[J]. 煤炭学报，2018，43(4)：984-992.(WANG Xuebin，HOU Wenteng，PAN Yishan，et al. Experimental of strain localization processes of coal specimens in uniaxial compression based on the digital image correlation method[J]. Journal of China Coal Society，2018，43(4)：984-992.(in Chinese))
[17]	王助贫，邵龙潭，孙益振. 基于数字图像测量技术的粉煤灰三轴试样剪切带研究[J]. 岩土工程学报，2006，28(9)：1 163-1 167. (WANG Zhupin，SHAO Longtan，SUN Yizhen. Study on shear band of fly ash triaxial specimen based on digital image processing technique[J]. Chinese Journal of Geotechnical Engineering，2006，28(9)：1 163-1 167.(in Chinese))
[2]	王襄禹，柏建彪，陈勇，等. 深井巷道围岩应力松弛效应与控制技术[J]. 煤炭学报，2010，35(7)：1 072-1 077.(WANG Xiangyu，BAI Jianbiao，CHEN Yong，et al. Stress relaxation effect and control technology in surrounding rock in deep entry[J]. Journal of China Coal Society，2010，35(7)：1 072-1 077.(in Chinese))
[4]	于怀昌，周敏，刘汉东，等. 粉砂质泥岩三轴压缩应力松弛特性试验研究[J]. 岩石力学与工程学报，2011，30(4)：803-811. (YU Huaichang，ZHOU Min，LIU Handong，et al. Experimental investigation on stress relaxation properties of silty mudstone under triaxial compression[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(04)：803-811.(in Chinese))
[10]	苏承东，陈晓祥，袁瑞甫. 单轴压缩分级松弛作用下煤样变形与强度特征分析[J]. 岩石力学与工程学报，2014，33(6)：1 135-1 141. (SU Chengdong，CHEN Xiaoxiang，YUAN Ruifu. Analysis of deformation and strength characteristics of coal samples under uniaxial compression of stepped relaxation[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(6)：1 135-1 141.(in Chinese))
[12]	朱合华，叶斌. 饱水状态下隧道围岩蠕变力学性质的试验研究[J]. 岩石力学与工程学报，2002，21(12)：1 791-1 796.(ZHU Hehua，YE Bin. Experimental study on mechanical properties of rock creep in saturation[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(12)：1 791-1 796.(in Chinese))
[14]	王睿. 渗流条件下花岗岩蠕变及本构模型研究[博士学位论文][D]. 北京：中国矿业大学，2018.(WANG Rui. Study on creep and constitutive model of granite under condition of seepage[Ph. D. Thesis][D]. Beijing：China University of Mining and Technology，2018.(in Chinese))
[19]	许江，宋肖徵，彭守建，等. 基于3D-DIC技术岩石广义应力松弛特性试验研究[J]. 岩土力学，2021，42(1)：27-38.(XU Jiang，SONG Xiaozheng，PENG Shoujian，et al. Experimental study of generalized stress relaxation of rock based on 3D-DIC technology[J]. Rock and Soil Mechanics，2021，42(1)：27-38.(in Chinese))
[20]	李克钢，杨宝威，秦庆词. 基于核磁共振技术的白云岩卸荷损伤与渗透特性试验研究[J]. 岩石力学与工程学报，2019，38(增2)：3 493-3 502.(LI Kegang，YANG Baowei，QIN Qingci. Experimental study on unloading damage and permeability of dolomite based on nuclear magnetic resonance technique[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(Supp.2)：3 493-3 502.(in Chinese))
[24]	TANG Y，OKUBO S，XU J，et al. Progressive failure behaviors and crack evolution of rocks under triaxial compression by 3D digital image correlation[J]. Engineering Geology，2019，249(31)：172-185.
[27]	郑晓卿，刘建，卞康，等. 鄂西北页岩饱水软化微观机制与力学特性研究[J]. 岩土力学，2017，38(7)：2 022-2 028.(ZHENG Xiaoqing，LIU Jian，BIAN Kang，et al. Softening micro-mechanism and mechanical properties of water-saturated shale in Northwestern Hubei[J]. Rock and Soil Mechanics，2017，38(7)：2 022-2 028.(in Chinese))
[5]	PARASKEVOPOULOU C，PERRAS M，DIEDERICHS M，et al. The three stages of stress relaxation-observations for the time-dependent behavior of brittle rocks based on laboratory testing[J]. Engineering Geology，2017，216：56-75.
[8]	PENG S，PODNIEKS E R. Relaxation and the behavior of failed rock[J]. International Journal of Rock Mechanics and Mining Sciences，1972，9(6)：699-712.
[15]	黄书岭，冯夏庭，周辉，等. 水压和应力耦合下脆性岩石蠕变与破坏时效机制研究[J]. 岩土力学，2010，31(11)：3 441-3 451. (HUANG Shuling，FENG Xiating，ZHOU Hui，et al. Study of aging failure mechanics and triaxial compression creep experiments with water pressure coupled stress of brittle rock[J]. Rock and Soil Mechanics，2010，31(11)：3 441-3 451.(in Chinese))
[18]	宋义敏，赵同彬，姜耀东. 基于DSCM的岩石蠕变变形场演化试验研究[J]. 中国矿业大学学报，2013，42(3)：466-470.(SONG Yimin，ZHAO Shutong，JIANG Yaodong. Experimental study on the evolution of creep deformation field of rock based on DSCM[J]. 2013，42(3)：466-470.(in Chinese))
[25]	郭翔. 飞行器材料高速高温动态变形检测技术研究[博士学位论文][D]. 西安：西安交通大学，2014.(GUO Xiang. Research on high-speed and high-temperature dynamic deformation detection technology for aircraft materials[Ph. D. Thesis][D]. Xi?an：Xi?an Jiaotong University，2014.(in Chinese))
[21]	大久保诚介，汤杨，许江，等. 可视化三轴压缩伺服控制试验系统的改进和应用[J]. 岩石力学与工程学报，2017，36(增1)：3 351-3 358.(OKUBO S，TANG Yang，XU Jiang，et al. Improvement and application of transparent triaxial compression servo-control test system[J]. Chinese Journal of Rock Mechanics and Engineering，2017，36(Supp.1)：3 351-3 358.(in Chinese))
[23]	MARTIN C D，CHANDLERN A. The progressive fracture of Lac du Bonnet granite[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1994，31(6)：643-659.
[26]	SONG H P，ZHANG H，KANG Y L，et al. Damage evolution study of sandstone by cyclic uniaxial test and digital image correlation[J]. Tectonophysics，2013，608：1 343-1 348.
[29]	胡玉，邓华锋，李建林，等. 水-岩作用下砂岩微细观结构变化特性及机理研究[J]. 防灾减灾工程学报，2018，38(2)：265-273.(HU Yu，DENG Huafeng，LI Jianlin，et al. Research on characteristics and mechanism of micro-structure variation in sandstone under water-rock interaction[J]. Journal of Diaster Prevention and Mitigation Engineering，2018，38(2)：265-273.(in Chinese))