Discussion on the Taking-Value of the best and Largest Throwout Rate under Multiboundary Blasting System

The best and largest throwout rate and its changing limit under multiboundary (different topography) have been obtained with the analysing of large amount of prcatice means of engineering explosion. Comparing with the taking value of throwout rate both at home and abroad, our chnging rules are correct and including the partial experience both at home and abroad in different cases. The study results can be used for the design of multiboundary blasting system.