Numerical Simulation Analysis of Rock Blasting Based on ANSYS/LS-DYNA
To study the effect of different ground stress fields on the expansion effect of rock blasting cracks,multiple sets of two-dimensional numerical models are constructed using ANSYS/LS-DYNA.The rock mass blasting processes under different ground stress conditions are simulated,and the differences situation in its fracture zones and blasting crack morphology are compared and analyzed,as well as the changes situation in tangential stress time history curves of each measuring point unit in different directions.The results show that ground stress has a suppressive impact on rock damage during the rock blasting process,and cracks will develop towards the direction of maximum ground stress,and the difference in cracks will increase with the increase of lateral pressure coefficient;Ground stress has a significant impact on the formation of its blasting fragmentation zone;With the increase of ground stress,the peak value of tangential tensile stress gradually decreases and the action time shortens.
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