Optimizement Study Of Pre-splitting Parameter In Xiaowan Dropower Station

In project of excavating Xiao wan Hydropower station , rotten rock and terrane crack in parcel area make detinite difficulty of blastiong . In all work area the vibrancy of blasting bring influence of stability of sloping , increase the control of the vibrancy and difficulty of design of the pre-splitting blasting parameters . the different require and equipment of construction even more increase the difficulty of the design.This article study the most three factors of influence in pre-splitting blasting , which are powder capacity per meter , spacing of hole and decoupling. On the basis of ANSYS/LS-DYNA and establishing 3D model about two pre-splitting holes, numerical value sumilate expanded process of the crack , then estimates effect of the rock crash by analyzing stress , otherwise estimates effect of pre-splitting blasting by expanded picture .By some parameters of models which accord with pre-splitting blasting , regresses a logical equation about there parameters . Finally applying the equation for Xiaowan hydropower station , logically instruct the designment of the different construction requirement in the station.