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提出了岩石爆破破碎过程的分形理论，并将其应用于确定微差爆破起爆时间，从而建立了微差延期时间优化的新思路、新方法。本文以平巷含空孔直眼掏槽微差起爆时间为例进行分析和论证。
The fractal theory of rock blasting and crushing process was put forward and applied to determine the initiation time of differential blasting. A new method and new method to optimize the time delay was established. In this paper, the horizontal hole with a straight hole undercut drift time as an example to analyze and demonstrate.