Estimation of the number of specimens required for acquiring reliable rock mechanical parameters in laboratory uniaxial compression tests

doi:10.1016/j.enggeo.2017.03.023

CORC > 武汉岩土力学研究所 > 中科院武汉岩土力学所 > 岩土力学所知识全产出 > 期刊论文

	Estimation of the number of specimens required for acquiring reliable rock mechanical parameters in laboratory uniaxial compression tests
	Yang, Bing 1,2; Cui, Jie 1,2; Zhang, Meizhu 1,2; Jiang, Quan 2; Feng, Xiating2 ; Li, Shaojun 2
刊名	ENGINEERING GEOLOGY
	2017
卷号	222 页码:186-200
关键词	Rock variability Number of required specimens Uniaxial compression test Mechanical parameters Confidence interval
ISSN号	0013-7952
DOI	10.1016/j.enggeo.2017.03.023
英文摘要	The inhomogeneous variability of natural rock always leads to the uncertainty of the parameters gained from the compressive testing data of a limited number of specimens. In this technical note, a systematic comparison for two presented classical approaches, i.e. the Yamaguchi's "decision of the sample number approach (DSNA)" and the "confidence interval approach (CIA)", is firstly made to identify the cause of discrepancy in the number of required specimens evaluated with different methods. Based on the advantages of both methods, the confidence interval dynamic process approach (CIDPA) is proposed to dynamically determine the number of required specimens during the test process. This presented technical method can effectively avoid the waste of rock specimens while ensuring the accuracy of parameters under a given confidence level. In addition, all of the methods mainly used for the uniaxial comprehensive strength with the Gaussian distribution are extended to obtain a reliable elastic modulus that usually obeys lognormal distribution. Finally, uniaxial compression tests of oblique porphyritic basalt (OP-basalt) and amygdaloidal basalt (Am-basalt) are analyzed to verify the contrast between the results obtained with different approaches and the rationality of CIDPA. (C) 2017 Elsevier B.V. All rights reserved.
WOS研究方向	Engineering ; Geology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000402343900017
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4064]
专题	岩土力学所知识全产出_期刊论文岩土力学所知识全产出国家重点实验室知识产出_期刊论文
作者单位	1.Univ Chinese Acad Sci 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn ;
推荐引用方式 GB/T 7714	Yang, Bing,Cui, Jie,Zhang, Meizhu,et al. Estimation of the number of specimens required for acquiring reliable rock mechanical parameters in laboratory uniaxial compression tests[J]. ENGINEERING GEOLOGY,2017,222:186-200.
APA	Yang, Bing,Cui, Jie,Zhang, Meizhu,Jiang, Quan,Feng, Xiating,&Li, Shaojun.(2017).Estimation of the number of specimens required for acquiring reliable rock mechanical parameters in laboratory uniaxial compression tests.ENGINEERING GEOLOGY,222,186-200.
MLA	Yang, Bing,et al."Estimation of the number of specimens required for acquiring reliable rock mechanical parameters in laboratory uniaxial compression tests".ENGINEERING GEOLOGY 222(2017):186-200.