不同应力路径下含水泥岩崩解破坏跨尺度分形规律研究

doi:10.13722/j.cnki.jrme.2022.0608

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (5809 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要为研究水和不同应力路径下泥岩崩解演化特征，采用扫描电镜、高能CT、三轴伺服压力机，探究微观颗粒结构、细观孔隙数量、宏观崩解及破坏块度的分形维数变化规律，揭示泥岩的跨尺度破坏机制。结果表明：(1) 泥岩中黄铁矿与高岭石颗粒粒径和形态差异，产生的原生孔隙会成为水渗通道；随着含水率增加，高岭石结构劣化导致水渗通道变宽，细观孔隙分形维数逐渐增大。(2) 大孔隙数量增多、贯通，泥岩发生自然崩解，崩解块度分形维数为1.26～1.77，大于孔隙分形维数。加卸载作用下破坏块度分形大于自然崩解状态块度分形，体现出力的损伤叠加作用。(3) 加卸载作用下破坏块度分形维数具有分区性，在特征含水率之前，块度分形维数与强度成负相关关系，超过特征含水率后与强度成正相关关系，分形维数拐点可以作为含水率和应力影响的分界点，该点处水对主破裂面影响程度达到峰值。(4) 卸载应力路径影响含水泥岩破坏特征和形态，低含水率泥岩呈脆性破坏，高含水率泥岩呈塑性破坏，张拉破坏增多，碎块多为“片状”。

	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
	刘跃东1
	2
	康红普1
	2

关键词 ：岩石力学, 应力路径, 含水泥岩, 崩解破坏, 分形维数, 跨尺度

Abstract：In order to study the disintegration evolution characteristics of mudstone under water and different stress paths，scanning electron microscopy，high-energy CT and triaxial servo press were used to explore the fractal dimension variation law of microscopic particle structure，microscopic pore number，macroscopic disintegration and failure fragmentation，and reveal the cross-scale failure mechanism of mudstone. The results show that：(1) The particle size and morphology of pyrite and kaolinite in mudstone are different，and the primary pores will become water seepage channels. With the increase of water content，the deterioration of kaolinite structure leads to the widening of water seepage channel and the increase of microscopic pore fractal dimension. (2) The number of large pores increases and penetrates，and natural disintegration of mudstone occurs. The fractal dimension of disintegration block is between 1.26 and 1.77，which is larger than that of pore fractal dimension. The damage fragmentation fractal under loading and unloading is greater than that under natural disintegration，reflecting the damage superposition effect of external force. (3) The fractal dimension of fragmentation under loading and unloading is all partitioned. Before the characteristic water content，the fractal dimension of the block is negatively correlated with the strength，but it is positively correlated with the strength after exceeding the characteristic water content. The inflection point of the fractal dimension can be used as the demarcation point of the influence of water content and stress. At this point，the influence of water on the main fracture surface reaches the peak. (4) The unloading stress path affects the failure characteristics and morphology of water-bearing mudstone. The low-water-content mudstone exhibits brittle failure，and the high-water-content mudstone exhibits plastic failure. The tensile failure increases，and the fragments are mostly“flaky”.

Key words： rock mechanics stress path water-bearing mudstone disintegration failure fractal dimension cross-scale

引用本文:

刘跃东1，2，康红普1，2. 不同应力路径下含水泥岩崩解破坏跨尺度分形规律研究[J]. 岩石力学与工程学报, 2023, 42(S2): 4162-4173.
LIU Yuedong1，2，KANG Hongpu1，2 . Study on cross-scale fractal law of disintegration and failure of water-bearing mudstone under different stress paths. , 2023, 42(S2): 4162-4173.

链接本文:

http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2022.0608 或 http://rockmech.whrsm.ac.cn/CN/Y2023/V42/IS2/4162

[1]	康天合，柴肇云，王栋，等. 物化型软岩块体崩解特性差异的试验研究[J]. 煤炭学报，2009，34(7)：907-911.(KANG Tianhe，CHAI Zhaoyun，WANG Dong，et al. Experimental study on the block disintegration difference of physicochemical soft rock[J]. Journal of China Coal Society，2009，34(7)：907-911.(in Chinese))
[2]	VÁSÁRHELYI B，VÁN P. Influence of water content on the strength of rock[J]. Engineering Geology，2006，84(1)：70-74.
[4]	ERGULER Z A，ULUSAY R. Water-induced variations in mechanical properties of clay-bearing rocks[J]. International Journal of Rock Mechanics and Mining Sciences，2009，46(46)：355-370.
[6]	谢和平. 岩石混凝土损伤力学[M]. 徐州：中国矿业大学出版社，1998：1-68.(XIE Heping. Damage mechanics of rocks and concrete[M]. Xuzhou：China University of Mining and Technology Press，1998：1-68.(in Chinese))
[7]	高峰，谢和平，赵鹏. 岩石块度分布的分形性质及细观结构效应[J]. 岩石力学与工程学报，1994，13(3)：240-246.(GAO Feng，XIE Heping，ZHAO Peng. Fractal properties of size-frequency distribution of rock fragment and the influence of meso-structure[J]. China Journal of Rock Mechanics and Engineering，1994，13(3)：240-246.(in Chinese))
[8]	刘传孝，蒋金泉，刘福胜，等. 岩石材料微、细、宏观断裂机制尺度效应的分形研究[J]. 岩土力学，2008，29(10)：2 619-2 622.(LIU Chuanxiao，JIANG Jinquan，LIU Fuheng，et al. Fractal study of scale effect in microscopic，mesoscopic and macroscopic states for fracture mechanism of rock materials[J]. Rock and Soil Mechanics，2008，29(10)：2 619-2 622.(in Chinese))
[11]	冯国瑞，文晓泽，郭军，等. 含水率对煤样声发射特征和碎块分布特征影响的试验研究[J]. 中南大学学报：自然科学版，2021，52(8)：2 910-2 918.(FENG Gourui，WEN Xiaoze，GUO Jun，et al. Study on influence of moisture content on coal sample AE properties and fragment distribution characteristics[J]. Journal of Central South University：Science and Technology，2021，52(8)：2 910-2 918.(in Chinese))
[12]	黄明，邱继业，詹金武，等. 含水状态下弱风化泥质粉砂岩冲击破碎的分形规律研究[J]. 工程地质学报，2016，24(4)：597-603. (HUANG Ming，QIU Jiye，ZHAN Jinwu，et al. Fractal law of weak-weathered argillaceous siltstone with different water contents subjected to SHPB impact crushing[J]. Journal of Engineering Geology，2016，24(4)：597-603.(in Chinese))
[14]	SU X，TANG H ，HUANG L，et al. The role of pH in red-stratum mudstone disintegration in the Three Gorges reservoir area，China，and the associated micromechanisms[J]. Engineering Geology，2020，279：105873.
[16]	叶万军，李长清，杨更社，等. 冻融环境下黄土体结构损伤的尺度效应[J]. 岩土力学，2018，39(7)：2 336-2 343.(YE Wanjun，LI Changqing，YANG Gengshe，et al. Scale effects of damage to loess structure under freezing and thawing conditions[J] Rock and Soil Mechanics，2018，39(7)：2 336-2 343.(in Chinese))
[17]	张向东，王浩，敬鹏飞. 基于岩石“等效损伤”探究宏观断裂规律[J]. 中国地质灾害与防治学报，2020，31(3)：117-125.(ZHANG Xiangdong，WANG Hao，JING Pengfei. Studying the macroscopic fracture rule based on rock“equivalent damage”[J]. The Chinese Journal of Geological Hazard and Control，2020，31(3)：117-125.(in Chinese))
[18]	赵光明，刘崇岩，许文松，等. 扰动诱发高应力卸荷岩体破坏特征实验研究[J]. 煤炭学报，2021，46(2)：412-423.(ZHAO Guangming，LIU Chongyan，XU Wensong，et al. Experimental study on the failure characteristics of high stress unloading rock mass induced by disturbance[J]. Journal of China Coal Society，2021，46(2)：412-423. (in Chinese))
[3]	ZHANG N，HE M，LIU P. Water vapor sorption and its mechanical effect on clay-bearing conglomerate selected from China[J]. Engineering Geology，2012，141-142(4)：1-8.
[5]	孟召平，彭苏萍，傅继彤. 含煤岩系岩石力学性质控制因素探讨[J]. 岩石力学与工程学报，2002，21(1)：102-106.(MENG Zhaoping，PENG Suping，FU Jitong. Study on control factors of rock mechanics properties of coal-bearing formation[J] China Journal of Rock Mechanics and Engineering，2002，21(1)：102-106.(in Chinese))
[13]	王子娟，刘新荣，傅晏，等. 2种pH水环境干、湿循环作用对泥质砂岩的侵蚀研究[J]. 岩土力学，2016，37(11)：3 231-3 239. (WANG Zijuan，LIU Xinrong，FU Yan，et al. Erosion analysis of argillaceous sandstone under dry-wet cycle in two pH conditions[J]. Rock and Soil Mechanics，2016，37(11)：3 231-3 239.(in Chinese))
[15]	付宏渊，刘杰，曾铃，等. 考虑荷载及干湿循环作用的炭质泥岩崩解特征试验[J]. 中国公路学报，2019，32(9)：22-31.(FU Hongyuan，LIU Jie，ZENG Ling，et al. Disintegration characteristics of carbonaceous mudstone under loading and wet-dry cycles[J]. China Journal of Highway and Transport，2019，32(9)：22-31.(in Chinese))
[21]	蔚斐，张通，刘文杰，等. 不同卸荷应力路径下煤样破坏特征实验研究[J]. 工矿自动化，2022，48(4)：96-104.(YU Fei，ZHANG Tong，LIU Wenjie，et al. Study on failure characteristics of coal sample under different unloading stress paths[J]. Journal of Mine Automation，2022，48(4)：96-104.(in Chinese))
[22]	黄达，谭清，黄润秋. 高围压卸荷条件下大理岩破碎块度分形特征及其与能量相关性研究[J]. 岩石力学与工程学报，2012，31(7)：1 379-1 389.(HUANG Da，TAN Qing，HUANG Runqiu. Fractal characteristics of fragmentation and correlation with energy of marble under unloading with high confining pressure[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(7)：1 379- 1 389.(in Chinese))
[23]	王伟，汪涛，熊德发，等. 三轴循环加卸载下砂岩声发射分形特征试验[J]. 工程科学与技术，2022，54(2)：90-100.(WANG Wei，WANG Tao，XIONG Defa，et al. Experiment of fractal characteristics of acoustic emission of sandstone under triaxial cyclic loading and unloading[J]. Advanced Engineering Scineces，2022，54(2)：90-100. (in Chinese))
[25]	胡华. 黑色泥页岩中黄铁矿与有机质含量的关系及勘探意义[博士学位论文][D]. 荆州：长江大学，2017.(HUA Hu. Study on the relationship of pyrite and content of organic matter in marine black shale and its significance for shale gas exploration[Ph. D. Thesis][D]. Jingzhou：Yangtze University，2017.(in Chinese))
[9]	李桂臣，李菁华，孙元田，等. 泥岩多尺度模型与水岩作用特性研究进展[J]. 煤炭学报，2022，47(3)：1 138-1 154.(LI Guichen，LI Jinghua，SUN Yuantian，et al. Advance of multi-scale study on both analytic models and water-rock interaction characteristics of mudstone[J]. Journal of China Coal Society，2022，47(3)：1 138- 1 154.(in Chinese))
[19]	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))
[10]	侯文光，秦金辉. 动载荷下含水率对黄砂岩的分形特征及比表面能的影响[J]. 武汉工程大学学报，2021，43(3)：307-312.(HOU Wenguang，QIN Jinhui. Influence of water content on fractal characteristics and specific surface energy of yellow sandstone under dynamic loading[J]. Journal of Wuhan Institute of Technology，2021，43(3)：307-312.(in Chinese))
[20]	杨科，刘文杰，马衍坤，等. 真三轴单面临空下煤岩组合体冲击破坏特征试验研究[J]. 岩土力学，2022，43(1)：15-27.(YANG Ke，LIU Wenjie，MA Yankun，et al. Experimental study of impact failure characteristics of coal-rock combination bodies under true triaxial loading and single face unloading[J]. Rock and Soil Mechanics，2022，43(1)：15-27.(in Chinese))
[24]	徐小荷，余静. 岩石破碎学[M]. 北京：煤炭工业出版社，1984：227-229.(XU Xiaohe，YU Jing. Rock fragmentation[M]. Beijing：China Coal Industry Publishing House，1984：227-229.(in Chinese))
[27]	于艳梅，胡耀青，梁卫国，等.瘦煤热破裂规律显微CT试验[J]. 煤炭学报，2010，35(10)：1 696-1 700.(YU Yanmei，HU Yaoqing，LIANG Weiguo，et al. Micro-CT experimental research of lean coal thermal cracking laws[J]. Journal of China Coal Society，2010，35(10)：1 696-1 700.(in Chinese))
[28]	周动，冯增朝，王辰，等. 煤吸附甲烷结构变形的多尺度特征[J]. 煤炭学报，2019，44(7)：2 159-2 166.(ZHOU Dong，FENG Zengchao，WANG Chen，et al. Multi-scale characteristics of coal structure deformation during methane adsorption[J]. Journal of China Coal Society，2019，44(7)：2 159-2 166.(in Chinese))
[26]	张志亮. 高岭石径厚比测算方法及其在层流环境受力仿真模拟[博士学位论文][D]. 北京：中国矿业大学(北京)，2020.(ZHANG Zhiliang. Measurement method of aspect ratio of kaolintie and simulation of mechanical model of kaolinite in laminar flow regime of newtonian liquid[Ph. D. Thesis][D]. Beijing：China University of Mining and Technology(Beijing)，2020.(in Chinese))