切槽爆破中V形切槽产生的力学效应研究  

STUDIES ON THE MECHANICAL EFFECTS PRODUCED BY THE V-SHAPED NOTCH BOREHOLE BLASTING

作　　者：杜云贵[1] 张志呈[2] 李通林[1] 

机构地区：[1]重庆大学 [2]四川建材学院

出　　处：《爆炸与冲击》1991年第1期26-30,共5页Explosion and Shock Waves

摘　　要：本文详细研究了切槽爆破中V形切槽在爆炸冲击波的动态压力和爆生气体的准静态压力作用下产生的力学效应。在此基础上,进一步阐明了V形切槽对岩石定向破裂的控制机理,提出了切槽爆破中裂缝扩展的力学判据。最后,对所得结论用实验结果进行了验证。Notched borehole blasting is an effective technique for improving the results of smooth blasting and presplitting blasting.The mechanical effects produced by the V-shaned notch which is under both the dynamic pressure of blast, wave and the quasi-stationary pressure of blast gas are studied, in detal . On the basis of this study, the control-mechanism of the notch to rock oriented cracking is demonstrated and some criteria for the advance of initial crack in notched borehole blasting are o(?)sented. At the end of this paper, the conclusions from this stuty are confirmed by the results of the model tests.

关 键 词：爆破 切槽 力学效应 定向破裂 炮孔 

分 类 号：TD253.11[矿业工程—矿井建设]