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Particle Crushing of a Filled Fracture During Compression and Its Effect on Stress Wave Propagation

文献类型：期刊论文

作者Huang, Xiaolin1,2,3; Qi, Shengwen1,2,3; Xia, Kaiwen4; Shi, Xiaoshan1,2,3
刊名JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
出版日期2018-07-01
卷号123期号:7页码:5559-5587
关键词filled fracture compression behavior particle crushing high-amplitude stress wave dynamic fault weakening split Hopkinson pressure bar (SHPB)
ISSN号2169-9313
DOI10.1029/2018JB016001
英文摘要Filled fractures commonly exist in the earth medium and occur at all scales, such as filled joints and gouge-filled faults. The compression behavior of a filled fracture is important for understanding its seismic response, although this has rarely been studied. In this study, laboratory tests were conducted to investigate the compression behavior of a simulated filled fracture under different stress states. It was found that the simulated fracture was compacted and experienced strain-hardening deformation under low compressive stress. Its compression behavior was described by the Bandis-Barton (B-B) model. When the compressive stress was high, numerous particles in the fillings were crushed and the filled fracture weakened, while its stiffness abruptly decreased. This process was related to the strain-softening deformation. As the compressive stress increased further, fillings were compacted again and some particles were crushed. The unloading deformation of a filled fracture had an obvious hysteresis characteristic. A modified B-B model was proposed to characterize the deformation behavior of the filled fracture under high stress states. It was proven that the modified B-B model can characterize the effect of the particle crushing on the deformation behavior of the filled fracture and also has the capability to capture the seismic response of the filled fracture under high-amplitude stress waves. The results of this study indicate a new and attractive form of dynamic weakening of the granular gouge, which resulted from particle crushing. They can be used to understand the dynamic weakening mechanisms of a gouge-filled fault under high-amplitude stress waves. Plain Language Summary Fractures commonly exist in the earth medium, which are discontinuous geological interfaces and occur at different scales such as the joint and the fault. A natural fracture is often filled with granular materials, which is the weakest planes in a rock mass, and is the location where sliding, opening, and compression are initialized. The filled fracture such as gouge-filled fault often weakens by dynamic stressing like seismic waves, leading to the decrease of the stiffness and frictional strength. In this paper, laboratory tests were conducted to investigate the compression behavior of a simulated filled fracture under different stress states. It was found that particles in granular fillings were crushed under high compressive stress, causing the abrupt decrease in the stiffness of the filled fracture. After the experimental investigation, the constitutive model was proposed to characterize the compression behavior of the filled fracture under different stress states. The results of this study indicate a new and attractive form of dynamic weakening of the gouge-filled fault, which resulted from particle crushing in fillings. They can be used to understand the dynamic weakening mechanisms of a gouge-filled fault under high-amplitude stress waves.
WOS关键词ONE-DIMENSIONAL COMPRESSION ; LAYER INTERFACE MODEL ; SIMULATED FAULT GOUGE ; SHEAR-STRENGTH MODEL ; ROCK JOINTS ; DEFORMATIONAL BEHAVIOR ; PARALLEL FRACTURES ; SEISMIC-WAVES ; ACOUSTIC FLUIDIZATION ; EARTHQUAKE
资助项目National Natural Science Foundation of China[41322020] ; National Natural Science Foundation of China[41672307] ; National Natural Science Foundation of China[41172272] ; Chinese Academy of Science under Knowledge Innovation Project grant[KZCX2-EW-QN10] ; China Postdoctoral Science Foundation[2015M581167] ; China Postdoctoral Science Foundation[2016M600129] ; China Postdoctoral Science Foundation[2017M620903] ; Science Foundation of Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences[KLSG201702] ; China Scholarship Council CSC)
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000442588900011
出版者AMER GEOPHYSICAL UNION
资助机构National Natural Science Foundation of China ; Chinese Academy of Science under Knowledge Innovation Project grant ; China Postdoctoral Science Foundation ; Science Foundation of Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences ; China Scholarship Council CSC) ; National Natural Science Foundation of China ; Chinese Academy of Science under Knowledge Innovation Project grant ; China Postdoctoral Science Foundation ; Science Foundation of Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences ; China Scholarship Council CSC) ; National Natural Science Foundation of China ; Chinese Academy of Science under Knowledge Innovation Project grant ; China Postdoctoral Science Foundation ; Science Foundation of Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences ; China Scholarship Council CSC) ; National Natural Science Foundation of China ; Chinese Academy of Science under Knowledge Innovation Project grant ; China Postdoctoral Science Foundation ; Science Foundation of Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences ; China Scholarship Council CSC)
源URL[http://ir.iggcas.ac.cn/handle/132A11/88561]  
专题地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室
通讯作者Qi, Shengwen
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing, Peoples R China
2.Chinese Acad Sci, Inst Earth Sci, Beijing, Peoples R China
3.Univ Chinese Acad Sci, Beijing, Peoples R China
4.Univ Toronto, Dept Civil Engn, Toronto, ON, Canada
推荐引用方式
GB/T 7714		 Huang, Xiaolin,Qi, Shengwen,Xia, Kaiwen,et al. Particle Crushing of a Filled Fracture During Compression and Its Effect on Stress Wave Propagation[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2018,123(7):5559-5587.
APA Huang, Xiaolin,Qi, Shengwen,Xia, Kaiwen,&Shi, Xiaoshan.(2018).Particle Crushing of a Filled Fracture During Compression and Its Effect on Stress Wave Propagation.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,123(7),5559-5587.
MLA Huang, Xiaolin,et al."Particle Crushing of a Filled Fracture During Compression and Its Effect on Stress Wave Propagation".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 123.7(2018):5559-5587.

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来源：地质与地球物理研究所

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