标题：Bursting liability of coal research of heterogeneous coal based on particle flow microscopic test
作者：Zhao, Tong-Bin ;Yin, Yan-Chun ;Tan, Yun-Liang ;Wei, Ping ;Zou, Jian-Chao
作者机构：[Zhao, Tong-Bin ;Yin, Yan-Chun ;Tan, Yun-Liang ] State Key Laboratory Breeding Base for Mining Disaster Prevention and Control, Shandong University of 更多
来源：Meitan Xuebao/Journal of the China Coal Society
摘要：To research the influence of different heterogeneous parameters on bursting liability of coal, the uniaxial compressing tests of heterogeneous coal based on Weibull distribution with different elastic modulus and bonding strength were simulated by using particle flow code (PFC). The accumulation and release of energy was studied, and bursting liability of coal with different heterogeneities was researched. The results indicate that the elastic modulus heterogeneity has a power function relation with macroscopic modulus. With the increase of the modulus heterogeneity, more energy is accumulated before peak strength. The bursting liability of coal is more possible at high modulus heterogeneity. The bond strength heterogeneity has a power function relation with compressive strength. With the increase of the strength heterogeneity, more energy is accumulated before peak strength, and the energy release speeds up after peak. The coal failure type transforms from plastic to fragility. The bursting liability of coal is more possible at high strength heterogeneity. The bond strength heterogeneity with influence on before and after peak strength has more impact on bursting liability of coal compared with modulus heterogeneity with influence only on before peak.