Fractal characteristics and acoustic emission of coal containing methane in triaxial compression failure

doi:10.1016/j.jappgeo.2015.11.018

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

	Fractal characteristics and acoustic emission of coal containing methane in triaxial compression failure
	Zhan, Tangqi 1,2; Kong, Xiangguo 1,2; Wang, Enyuan 1,2; Hu, Shaobin 3; Shen, Rongxi 1,2; Li, Xuelong 1,2
刊名	JOURNAL OF APPLIED GEOPHYSICS
	2016
卷号	124 页码:139-147
关键词	Acoustic emission Fractal characteristics Correlation dimension Gas Pores and cracks
ISSN号	0926-9851
DOI	10.1016/j.jappgeo.2015.11.018
英文摘要	Aimed at exploring the influence of methane to coal and studying fractal characteristics and acoustic emission (AE) features in the damage evolution, the triaxial compression experiments of coal containing methane were conducted, and acoustic emission response was collected simultaneously in the loading process. Based on the method for calculating the correlation dimension, the fractal dimension was calculated with regard to time series of acoustic emission. Our experimental results indicate that AE response and fractal dimension can reflect the evolution and propagation of cracks in the loading process. Corresponding to the load-time, acoustic emission experiences active, linearly increasing, rapidly augmenting and decreasing stage. However, the fractal dimension of AE develops from chaos to orderly state. Late loading, a continued slowdown in fractal dimension, can be used as a precursory signal of coal sample destruction. In addition, the amount of gas in the coal sample will influence the evolution of pore and fracture, which causes a variation in the acoustic emission signals and fractal dimension. The maximum bearing load reduces 18.85% and 49.18% within pore pressure of 0.75 and 1.5 MPa, compared with it (24.4 kN) of the coal sample (without gas). What's more, the increase of pore pressure will cause the growth of AE count and energy, but the correlation dimension of AE parameters drops. This study is helpful for us to understand the effects of methane to coal and the evolution mechanism of cracks, and it can be applied to the research on occurrence mechanism and early warning of coal and gas outburst. (C) 2015 Elsevier B.V. All rights reserved.
WOS研究方向	Geology ; Mining & Mineral Processing
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000368955500014
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/3802]
专题	岩土力学所知识全产出_期刊论文
作者单位	1.China Univ Min & Technol, Minist Educ, Key Lab Coal Mine Gas & Fire Prevent & Control ; 2.China Univ Min & Technol, Sch Safety Engn ; 3.Chinese Acad Sci, Inst Rock & Soil Mech
推荐引用方式 GB/T 7714	Zhan, Tangqi,Kong, Xiangguo,Wang, Enyuan,et al. Fractal characteristics and acoustic emission of coal containing methane in triaxial compression failure[J]. JOURNAL OF APPLIED GEOPHYSICS,2016,124:139-147.
APA	Zhan, Tangqi,Kong, Xiangguo,Wang, Enyuan,Hu, Shaobin,Shen, Rongxi,&Li, Xuelong.(2016).Fractal characteristics and acoustic emission of coal containing methane in triaxial compression failure.JOURNAL OF APPLIED GEOPHYSICS,124,139-147.
MLA	Zhan, Tangqi,et al."Fractal characteristics and acoustic emission of coal containing methane in triaxial compression failure".JOURNAL OF APPLIED GEOPHYSICS 124(2016):139-147.