Experimental study on formation mechanism of compaction bands in weathered rocks with high porosity

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	Experimental study on formation mechanism of compaction bands in weathered rocks with high porosity
	Han GF(韩国锋); Liu XL; Wang EZ; HAN, GF (reprint author), Tsinghua Univ, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China.
发表期刊	SCIENCE CHINA-TECHNOLOGICAL SCIENCES
	2013-10
卷号	56 期号:10 页码:2563-2571
ISSN	1674-7321
摘要	Since Mollema and Antonellini observed compaction bands in the field in 1996, different patterns of compaction bands have been found in laboratory experiments. There are some discrepancies between the laboratory experiments and the field observations: compared to the field observation, the stress levels required to induce compaction bands in laboratory experiments are usually higher than the inferred in the field, and the grain crushing are more intense in the laboratory experiments. In this paper, compaction bands were observed at the maximal principal stresses below 8 MPa, which is lower than the stress level inferred in the field, and there was no severe comminution inside the compaction bands. Experimental results indicate that the porosity and confining pressure have great impacts on the types of localization bands. Lower porosity and confining pressure can promote the growth of shear bands and high-angle shear bands. Higher porosity and confining pressure can promote the growth of discrete compaction bands. Intermediate porosity and confining pressure are favorable for the growth of hybrid modes involving two of the three, i.e., discrete compaction band, diffuse compaction band and high-angle shear band. The formation of discrete compaction bands is more unstable compared to diffuse compaction bands. The two types of compaction bands can appear in the same type rocks, and diffuse compaction bands are formed under lower confining pressure compared to discrete compaction bands. The reduction of permeability was within 2 orders of magnitude in this study, and it is 2-3 orders of magnitude lower than those obtained by other researchers.
关键词	Porous Rock Compaction Band Permeability Evolution
学科领域	岩体力学和土力学
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000325125700023
项目资助者	National Natural Sciences Foundation of China [51009079];National Basic Research Program of China [2011CB013503, 2013CB035902];Open Research Fund Program of State key Laboratory of Hydroscience and Engineering [2013-KY-6]
课题组名称	LMFS水环境流体力学(LEM)
论文分区	二类/Q2
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/47492
专题	流固耦合系统力学重点实验室
通讯作者	HAN, GF (reprint author), Tsinghua Univ, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China.
推荐引用方式 GB/T 7714	Han GF,Liu XL,Wang EZ,et al. Experimental study on formation mechanism of compaction bands in weathered rocks with high porosity[J]. SCIENCE CHINA-TECHNOLOGICAL SCIENCES,2013,56,10,:2563-2571.
APA	Han GF,Liu XL,Wang EZ,&HAN, GF .(2013).Experimental study on formation mechanism of compaction bands in weathered rocks with high porosity.SCIENCE CHINA-TECHNOLOGICAL SCIENCES,56(10),2563-2571.
MLA	Han GF,et al."Experimental study on formation mechanism of compaction bands in weathered rocks with high porosity".SCIENCE CHINA-TECHNOLOGICAL SCIENCES 56.10(2013):2563-2571.

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