Research on Chamber Tunnelling Blasting Vibration Based on Testing and Finite Element Numerical Simulation

摘要

Forecasting of the blasting vibration is an important subject of engineering blast Numerical simulation about vibration of chamber cutting blast had been taken, and the analysis of which had been contrary with field tested results of blasting vibration. Test tallies with peak value's vibration speed of numerical simulation basically. Regression analysis according to effective stress of element peak value, gained that attenuating rule follow negative-power exponent attenuation basically. Numerical simulation can open out blasting condition of inner rock, reflected distributing rule of inner rock blasting stress, to guide blasting safety construction, and the results may be useful in engineering blast