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The influence of temperature and confining pressure on the cracks damage threshold and shape parameter m of igneous rock

文献类型：期刊论文

作者Ge, Zhenlong1,6; Sun, Qiang3,4,6; Xue, Lei2,5; Wang, Shaofei1,6
刊名GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
出版日期2021-08-01
卷号7期号:3页码:14
关键词Damage threshold Temperature Confining pressure Shape parameter
ISSN号2363-8419
DOI10.1007/s40948-021-00254-5
英文摘要Determining rock damage thresholds is of great significance in predicting rock fracture. In this study, the relation among crack damage stress threshold (sigma(cd)), peak strength (sigma(ucs)) and shape parameter m was observed. The impact imposed by temperature and confining pressure on m was then examined. The results show that there is an approximate linear relationship between sigma(cd) and sigma(ucs). Therefore, the normalized quantity sigma(cd)/sigma(ucs) is considered one quantitative indicator useful in evaluating rock damage. The research performed uniaxial compression tests on gabbro specimens heated using microwaves. It is found that sigma(ucs) and sigma(cd) decrease gradually with increases in irradiation energy for gabbro samples; with identical irradiation energy, higher heating power leads to faster decrease of m. We also collected data from previous studies on igneous rock damage. It is found that, with increases in m, sigma(cd)/sigma(ucs) increases, but overall, the ratio is not sensitive to m and m is primarily distributed between 1 and 4; further, m decreases with increases in temperature-at 600 degrees C and 800 degrees C, m decreases significantly, which has close connections with quartz phase transition. Subject to low confining pressure, m grows as confining pressure grows. If the confining pressure rises beyond 40 MPa, the plastic characteristics of the rock are enhanced which causes m to decrease.
WOS关键词ACOUSTIC-EMISSION ; MECHANICAL-BEHAVIOR ; CONSTITUTIVE MODEL ; BRITTLE ROCKS ; HARD ROCKS ; STRESS ; GRANITE ; STRAIN ; PROPAGATION ; INITIATION
资助项目National Natural Science Foundation of China[41972288] ; National Natural Science Foundation of China[41977249] ; National Natural Science Foundation of China[42090052]
WOS研究方向Energy & Fuels ; Engineering ; Geology
语种英语
WOS记录号WOS:000652606100001
出版者SPRINGER HEIDELBERG
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 ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/101174]  
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Sun, Qiang; Xue, Lei
作者单位1.Xian Univ Sci & Technol, Coll Geol & Environm, Xian 710054, Shaanxi, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China
3.Minist Nat Resources, Key Lab Coal Resources Explorat & Comprehens Util, Xian 710021, Peoples R China
4.Shaanxi Prov Key Lab Geol Support Coal Green Expl, Xian 710054, Peoples R China
5.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
6.Xian Univ Sci & Technol, Geol Res Inst Coal Green Min, Xian 710054, Peoples R China
推荐引用方式
GB/T 7714		 Ge, Zhenlong,Sun, Qiang,Xue, Lei,et al. The influence of temperature and confining pressure on the cracks damage threshold and shape parameter m of igneous rock[J]. GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES,2021,7(3):14.
APA Ge, Zhenlong,Sun, Qiang,Xue, Lei,&Wang, Shaofei.(2021).The influence of temperature and confining pressure on the cracks damage threshold and shape parameter m of igneous rock.GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES,7(3),14.
MLA Ge, Zhenlong,et al."The influence of temperature and confining pressure on the cracks damage threshold and shape parameter m of igneous rock".GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES 7.3(2021):14.

入库方式： OAI收割

来源：地质与地球物理研究所

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