| 预裂爆破设计参数的理论分析 |
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| 引用本文： | 董振华,周祖仁,舒大强.预裂爆破设计参数的理论分析[J].爆炸与冲击,1988,8(3):236-242. |
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| 作者姓名： | 董振华 周祖仁 舒大强 |
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| 作者单位： | 武汉水利电力学院
(董振华，周祖仁)，武汉水利电力学院(舒大强) |
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| 摘 要： | 本文在分析不偶合装药爆破物理过程和动态冲击压力的基础上,研究了预裂孔的破坏型态;利用相应的破坏准则,推导了预裂孔临界和允许体积装药密度的理论计算式,并在总结已有的预裂成缝理论和实验成果的基础上,用裂断力学理论对成缝机理作了进一步探讨。考虑了岩体初始应力的影响,对裂缝扩展进行了定量描述,提出了预裂爆破炮孔间距的计算表达式。
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| 关 键 词： | 预裂爆破 成缝机理 破坏型态 临界装药密度 允许装药密度 |
THEORETICAL ANALYSIS OF DESIGN PARAMETERS FOR PRESPLITTING BLAST |
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| Dong Zhenhua Zhou Zuren Shu Daqiang.THEORETICAL ANALYSIS OF DESIGN PARAMETERS FOR PRESPLITTING BLAST[J].Explosion and Shock Waves,1988,8(3):236-242. |
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| Authors: | Dong Zhenhua Zhou Zuren Shu Daqiang |
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| Institution: | Wuhan Institute of Hydraulic and Electric Engineering |
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| Abstract: | According to the quality demands for presplitting blast the destroy forms of the hole-wall are researched in this paper by analysing the blasting physical process and the impact pressure in non-coupling charge.The theoretical calculation formulas of the critical and allowable charge density are obtained by using the correspond ing destroy criterions.Moreover the forming mechanism of presplitting crack is researched by using the relevant theory of fracture mechanics,and the crack propagation is quantitatively described.Finally,the calculation formula of the spacing is presented. |
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| Keywords: | presplitting blast forming mechanism of crack destroy form critical concentration of charge permissible concentration of charge |
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