Research on open-pit mine blasting load equivalent way

摘要

This article aims at more accurately studying an equivalent applying way of blasting load by numerical simulation method.Based on the theory of strength reduction, slope stability is analyzed.It can produce special blasting load when open-pit is mining, and made more able to simulate the actual blast load equivalent loading.The equivalent applying way of blasting load first analyze the characteristics of open-pit blasting load, it rings to pass from the explosion source to the surrounding, If the blasting load can equivalently load into the crushing outside the district boundary, so that it is more consistent with the actual hole blasting;The way uses FLAC3D to establish the open pit slope numerical model, and then analyzed using finite difference method under blasting dynamic loading the dynamic response characteristics of slope, then calculated using strength reduction pit slope seismic safety factor.And finally with the past will be the equivalent of blasting vibration is applied to the model boundary manner comparative, verification by the equivalent method is applied to blasting in the slope stability analysis under dynamic loading, the feasibility and rationality.