| 高台阶抛掷爆破速度规律的数值模拟 |
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| 引用本文： | 黄永辉, 刘殿书, 李胜林, 李祥龙, 王家磊. 高台阶抛掷爆破速度规律的数值模拟[J]. 爆炸与冲击, 2014, 34(4): 495-500. doi: 10.11883/1001-1455(2014)04-0495-06 |
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| 作者姓名： | 黄永辉 刘殿书 李胜林 李祥龙 王家磊 |
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| 作者单位： | 1. 昆明理工大学电力工程学院，云南 昆明 650500; 2. 中国矿业大学(北京) 力学与建筑工程学院，北京 100083; 3. 昆明理工大学国土资源工程学院，云南 昆明 650093 |
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| 基金项目： | 国家自然科学基金项目(51304087);云南省级人培项目(KKSY201404056,KKSA201121083)~~ |
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| 摘 要： | 为了获得高台阶抛掷爆破作用下岩石的抛掷速度变化规律，结合现场实验，采用理论分析、高速摄影技术、数值计算方法开展研究。研究结果表明，炮孔内炸药起爆后，坡面岩石抛掷初速度达到最大值的时间在93~105 ms之间，最大抛掷初速度在18~28 m/s之间；坡面岩石的最大抛掷初速度在延炮孔内传爆方向呈增长、稳定、下降的趋势；岩石抛掷运动过程的最后阶段呈自由落体运动，个别岩块的运动速度存在增减现象，主要是由于岩体破碎后岩块间存在的相互碰撞作用；高速摄影实验结果验证了数值计算结果的正确性、RHT材料本构模型及参数在高台阶抛掷爆破数值计算过程中的可用性。
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| 关 键 词： | 爆炸力学 速度场 RHT材料本构模型 高台阶抛掷爆破 高速摄影 |
| 收稿时间： | 2012-11-22 |
| 修稿时间： | 2014-06-05 |
Numerical simulation on pin-point blasting of sloping surface |
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| Yong-hui Huang, Dian-shu Liu, Sheng-lin Li, Xiang-long Li, Jia-lei Wang. Numerical simulation on pin-point blasting of sloping surface[J]. Explosion And Shock Waves, 2014, 34(4): 495-500. doi: 10.11883/1001-1455(2014)04-0495-06 |
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| Authors: | Yong-hui Huang Dian-shu Liu Sheng-lin Li Xiang-long Li Jia-lei Wang |
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| Affiliation: | 1. Faculty of Electic Power Engineering, Kunming University of Science and Technology, Kunming 650500, Yunnan, China; 2. School of Mechannics and Civil Engineering, China University ofMining and TechnologyBeijing), Beijing 100083, China; 3. Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China |
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| Abstract: | In order to obtain the casting speed of rock in pin-point blasting of sloping surface, a research was carried out by the field test, theoretical analysis, the high-speed photography and numerical simulation. The results of research show that maximum casting speed of rock was in the range of 18-28 m/s which was reached in 93-105 ms after detonation; along the direction of detonation propagating, maximum casting speed of rock increased to a platform firstly, then declined with the same motion resistance; in the end of pin-point blasting, the rock fall as free-faller, and the casting speed of rock vibrated due to the collision of rock; the process of pin-point blasting of sloping surface was simulated with the RHT constitutive model and parameters assorted. The result of numerical simulation was proved by the measurement of high-speed photography |
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| Keywords: | mechanics of explosion velocity field RHT material constitutive model pin-point blasting of sloping surface high-speed photography |
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