Research on numerical simulation of rock damage zone under periodic blasting
The effect of cumulative damage on surrounding rock under periodic blasting, will inevitably lead to the weakening of rock mass mechanics parameters, resulting in the macro failure of engineering rock mass.Applying ANSYS/LS-DYNA to simulate the process of periodic blasting.Rock mass uses the HJC dynamic constitutive model and periodic blasting process by using segmented detonation approach to simulation.Through damage nephogram of the rock, analyzes the damage evolution behavior of rock under periodic blasting.The simulation results showed that: when blasting excavation, explosion shock loading can cause a range of damage disturbance zone L, within the scope, damage of rock mass will increase with the increase of number of blasting;outside damage disturbed zone L, initial residual rock inelastic deformation and damage accumulation unit superposition residual tensile stress can balance the stress wave generated by the explosion, making the value of rock damage is not increased;rock has a cumulative effect damage, but the damage is not a simple one-time blast damage accumulation, but nonlinear.
periodic blast cumulative damage damage degree numerical simulation
PAN Cheng ZHAO Guang-ming MENG Xiang-rui LI Ying-jie
School of Mining and Safety, Anhui University of Science and Technology, Huainan 232001 ,China
国际会议
International Mining Conference 2014(2014国际采矿论坛)
安徽淮南
英文
167-172
2014-09-19（万方平台首次上网日期，不代表论文的发表时间）