Study of the Precursory Rules of a Deformation Localization of Coal Specimens

Rui Xi Zhang; Cong Jiang; Yu Kai Lv

doi:10.4028/www.scientific.net/AMR.945-949.1185

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 945-949Study of the Precursory Rules of a Deformation...

Study of the Precursory Rules of a Deformation Localization of Coal Specimens

Abstract:

The instability failure of coal and rock mass occur frequently in deep mining. However, this destruction occurs with abnormal intensity and suddenness, with hardly any obvious macro precursors. The ability to extract this precursory information and make certain the relationship among the parameters is therefore important. During the process of instability and failure of coal samples, the evolution characteristics of deformation field were monitored by digital image correlation system. Base on the researches, the appearance of the deformation localization band could be divided into three time periods for the samples which all had splitting failure. During period I, the relative sliding component increased rapidly. During period II, the relative tension component increased rapidly. During period III, both the relative tension and relative sliding components increased rapidly.

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Periodical:

Advanced Materials Research (Volumes 945-949)

Pages:

1185-1189

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.945-949.1185

Citation:

Cite this paper

Online since:

June 2014

Authors:

Rui Xi Zhang, Cong Jiang, Yu Kai Lv*

Keywords:

Deformation Localization Monitoring, Evolution Characteristics, Instability Destruction, Precursors

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* - Corresponding Author

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