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《EXPLOSION AND SHOCK WAVES》 1997-03
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ANALYSIS OF VIBRATION ISOLATING EFFECT OF PRE SPLITTING CRACK IN ROCK EXCAVATION BY BLASTING

Lu Wenbo,Lai Shixiang,Dong Zhenhua (Wuhan University of Hydraulic and Electric Engineering,Wuhan,430072)  
In this paper,through the analysis of interaction between explosion stress waves and the pre splitting crack whose interface strength is described with joint stiffness,and in consideration of the enclosure of crack caused by the incidence of stress waves under the condition that the crack is filled with water.The vibration isolating mechanism and the effect of pre splitting crack are studied,on the basis of which we propose a theoretical method for the optimum choosing of the contour control blasting in rock excavation.
【CateGory Index】: TD235.371
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