Experimental Research on Precursory Characteristics of Macroscopic Deformation of Coal and Rock Failure

5th International Conference on Environmental Science and Civil Engineering

生态环境科学;土木建筑工程

Xu, J.K.^1 ; Xi, D.Y.^2 ; Zhou, R.^3

School of Mines, State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou, China^1

School of Resources and Geosciences, China University of Mining and Technology, Xuzhou, China^2

School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, China^3

关键词: damage;    Deformation and failures;    Dynamic deformation characteristics;    Experimental research;    Image processing and analysis;    Macroscopic deformations;    Precursory information;    Uni-axial compression;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/283/1/012018/pdf
DOI  :  10.1088/1755-1315/283/1/012018

来源: IOP

【 摘 要 】

The research on precursory characteristics of coal and rock failure is of great significance for monitoring and early warning of disaster of surrounding rock. In this paper, the macroscopic deformation process of coal and rock under uniaxial compression is tested, and the evolution rule of the quantity, velocity and acceleration of their deformation is studied. The relationship between specimen surface damage and macroscopic deformation is investigated by image processing and analysis method. The research indicates that the macroscopic deformation indexes of coal and rock failure zones have significant changes before cracking, showing regular dynamic deformation characteristics, which could be precursory information of coal and rock failure.