supported by the Fundamental Research Funds for the Central Universities(Nos.2010QNB25 and 2012LWB66);the National Natural Science Foundation of China(Nos.51323004,51074163 and 50834005);the Trans-Century Training Programme Foundation for the Talents by the State Education Commission(No.NCET-08-0837);the"Six Major Talent"Plan of Jiangsu Province and the Graduate Innovation Fund Project of Jiangsu Province(No.CXZZ13_0924)
Based on the Particle Flow Code(PFC^(2D)) program,we set up gangue backfill models with different gangue contents and bond strength,and studied the stress-strain behaviours,the pattern of shear band and force chains,m...