In-site core disking phenomenon and break mechanism of hard marble: Investigation in 2400 m deep-buried underground laboratory

doi:10.1007/s11771-020-4521-9

	In-site core disking phenomenon and break mechanism of hard marble: Investigation in 2400 m deep-buried underground laboratory
	Zhong, Shan 2,3; Jiang, Quan 2; Liu, Chang 1,2; Li, Shao-jun 2; Qin, Wei-min 2; Zhou, Ji-fang 4; Sun, Wen-liang 4
刊名	JOURNAL OF CENTRAL SOUTH UNIVERSITY
	2020-10-01
卷号	27 期号:10 页码:2959-2970
关键词	rock mechanics deep engineering shear break tensile break high geostress
ISSN号	2095-2899
DOI	10.1007/s11771-020-4521-9
英文摘要	The core-disk phenomenon has been observed generally in the drilling process under high-stress conditions. This paper presents the in-situ experimental study of the coring-disking failure mechanism of marble in an underground cavens with 2400 m depth. Based on the disk samples in several boreholes with different diameters, both macro- and micro-morphological characteristics of core-disks' break surface were analysis, using 3D optical scanning and electron microscope scanning. Moreover, the numerical back analysis was also used to simulate the drilling process for demonstrating the development of core disking. The in-situ experiment results showed that the failure types of core disking consisted of tensile break and shear break, i.e., the shear break usually appears in the edge part of break surface, and tensile break appears in the central part. What's more, the ration of core-disks thickness to borehole diameter is in a relatively stable range. Numerical back analysis indicated this micro asynchronous break of hard marble is induced by high geostress and unloading drill.
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	JOURNAL OF CENTRAL SOUTH UNIV
WOS记录号	WOS:000590273400011
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/25130]
专题	中科院武汉岩土力学所
通讯作者	Jiang, Quan
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, State Key Lab Geomech & Geotech Engn, Inst Rock & Soil Mech, Wuhan 430071, Peoples R China 3.Swansea Univ, Coll Engn, Swansea SA1 8EP, W Glam, Wales 4.Yalong River Hydropower Dev Co Ltd, Chengdu 610051, Peoples R China
推荐引用方式 GB/T 7714	Zhong, Shan,Jiang, Quan,Liu, Chang,et al. In-site core disking phenomenon and break mechanism of hard marble: Investigation in 2400 m deep-buried underground laboratory[J]. JOURNAL OF CENTRAL SOUTH UNIVERSITY,2020,27(10):2959-2970.
APA	Zhong, Shan.,Jiang, Quan.,Liu, Chang.,Li, Shao-jun.,Qin, Wei-min.,...&Sun, Wen-liang.(2020).In-site core disking phenomenon and break mechanism of hard marble: Investigation in 2400 m deep-buried underground laboratory.JOURNAL OF CENTRAL SOUTH UNIVERSITY,27(10),2959-2970.
MLA	Zhong, Shan,et al."In-site core disking phenomenon and break mechanism of hard marble: Investigation in 2400 m deep-buried underground laboratory".JOURNAL OF CENTRAL SOUTH UNIVERSITY 27.10(2020):2959-2970.