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Empirical ratio of dynamic to static stiffness for propped artificial fractures under variable normal stress

文献类型：期刊论文

作者Zhou, Jian2,3,4; Zhang, Luqing2,3; Qi, Shengwen1,2,3; Yang, Duoxing5
刊名ENGINEERING GEOLOGY
出版日期2020-08-01
卷号273页码:12
ISSN号0013-7952
关键词Propped artificial fracture Nonlinear deformation Displacement discontinuity method Dynamic stiffness Static stiffness
DOI10.1016/j.enggeo.2020.105683
英文摘要The stiffness coefficient is a key parameter of rock fractures that controls the properties and behavior of a rock mass. According to the displacement discontinuity theory, the dynamic stiffness of rock fractures can be back analyzed using stress wave propagation. This study aims to measure the dynamic stiffness of rock fractures then develop an empirical ratio to describe the relationship between dynamic and static stiffness. Propped artificially fractured shale and granitic rock samples are employed. Mechanical and ultrasonic tests are conducted on two artificial rock fractures during uniaxial loading and unloading. As normal stress changes from 1 MPa to 50 MPa, the average dynamic normal stiffness of shale and granitic rock fractures changes from 330 GPa/m to 1960 GPa/m and from 90 GPa/m to 2320 GPa/m, respectively. For both artificial fractures, the dynamic stiffness is higher than the static stiffness but approaches the static stiffness with increasing normal stress. The ratio of dynamic to static normal stiffness is approximately 2.0 at a normal stress of 15 MPa; this ratio approaches 1.0 with increasing normal stress and varies widely under low normal stress. This study provides a method for evaluating the static or dynamic stiffness of rock fractures, which has important applications for seismic surveys or acoustic logs in the field of geological engineering.
WOS关键词SINGLE FRACTURES ; WAVE ATTENUATION ; FLUID-FLOW ; ROCK ; BEHAVIOR ; SLOPE ; FAILURE ; TRANSMISSION ; PROPAGATION ; INTERFACE
资助项目National Natural Science Foundation of China[41972287] ; National Natural Science Foundation of China[41672321] ; National Natural Science Foundation of China[41502307] ; China Postdoctoral Science Foundation[2019T120133] ; China Postdoctoral Science Foundation[2018M630204] ; China Scholarship Council[201804910293]
WOS研究方向Engineering ; Geology
语种英语
出版者ELSEVIER
WOS记录号WOS:000539424500005
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council
源URL[http://ir.iggcas.ac.cn/handle/132A11/97167]  
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Zhou, Jian
作者单位1.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China
3.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China
4.CSIRO Energy, Private Bag 10, Clayton, Vic 3169, Australia
5.China Earthquake Adm, Inst Crustal Dynam, Beijing 100085, Peoples R China
推荐引用方式
GB/T 7714		 Zhou, Jian,Zhang, Luqing,Qi, Shengwen,et al. Empirical ratio of dynamic to static stiffness for propped artificial fractures under variable normal stress[J]. ENGINEERING GEOLOGY,2020,273:12.
APA Zhou, Jian,Zhang, Luqing,Qi, Shengwen,&Yang, Duoxing.(2020).Empirical ratio of dynamic to static stiffness for propped artificial fractures under variable normal stress.ENGINEERING GEOLOGY,273,12.
MLA Zhou, Jian,et al."Empirical ratio of dynamic to static stiffness for propped artificial fractures under variable normal stress".ENGINEERING GEOLOGY 273(2020):12.

入库方式： OAI收割

来源：地质与地球物理研究所

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