TY - JOUR
TI - Influence of water-soaking time on the acoustic emission characteristics and spatial fractal dimensions of coal under uniaxial compression
AU - Jia Zheqiang
AU - Ren Li
AU - Liu Qiangying
AU - Peng Yuan
AU - Xu Duo
AU - Zha Ersheng
JN - Thermal Science
PY - 2017
VL - 21
IS - 11
SP - 327
EP - 334
PT - Article
AB - The water-soaking time affects the physical and mechanical properties of  coals, and the temporal and spatial evolution of acoustic emissions reflects  the fracture damage process of rock. This study conducted uniaxial  compression acoustic emissions tests of coal samples with different  water-soaking times to investigate the influence of water-soaking time on  the acoustic emissions characteristics and spatial fractal dimensions during  the deformation and failure process of coals. The results demonstrate that  the acoustic emissions characteristics decrease with increases in the  water-soaking time. The acoustic emissions spatial fractal dimension changes  from a single dimensionality reduction model to a fluctuation dimensionality  reduction model, and the stress level of the initial descending point of the  fractal dimension increases. With increases in the water-soaking time, the  destruction of coal transitions from continuous intense failure throughout  the process to a lower release of energy concentrated near the peak  strength.