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FORMULA OF SPLITTING BLASTING OF THREE GORCES OF YANGTZE RIVER

Liu Huanzhen(No.2 Engineering Company of Gezhouba (Group)Corporation,Hubei 443002)  
Parameters from better samples of splitting blasting of large-and medium-size water conservancy and hydroelectric projects have been collected and summarized in this paper.Combined with the practice of splitting blasting projects, based on the current formula proposed from criteria SDJ211-83,the empirical formula of the relationship of the charge of splitting blasting,hole diameter,hole spacing and limit compression strength of rock.In 1994,a large scale production test was carried out with the empirical formula in the experimental research on splitting blasting for the project of lifting ship machine and temporary ship lock in the Three Gorges of Yangtze River.It is selected as the Three Gorges’Formula.It is in practice proved that,the advantages of this formula are no fracture on splitted hole wall,tidy slope,high-quality and less charge than that of current formula.
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