| 岩石动态损伤特性实验及爆破模型 |
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| 引用本文： | 杨军,高文学,金乾坤.岩石动态损伤特性实验及爆破模型[J].岩石力学与工程学报,2001,20(3):320-320. |
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| 作者姓名： | 杨军 高文学 金乾坤 |
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| 作者单位： | 北京理工大学机电工程学院 |
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| 摘 要： | 探索岩石动态损伤参量及其演化表征方式以构造岩石爆破损伤模型。通过岩石冲击损伤实验,对冲击前后试件进行超声波测试, 得出岩石动态损伤与超声波衰减规律的关系。在考虑岩石冲击损伤过程的声波衰减规律及其与能量耗散率关系的基础上, 建立新的岩石爆破损伤模型。通过实验验证该模型的计算结果并实现了岩石台阶爆破数值计算。
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| 关 键 词： | 岩石爆破 损伤模型 冲击载荷 损伤演化 声波测试 衰减系数 |
| 文章编号： | 1000-6915(2001)03-0320-04 |
| 收稿时间： | 1999-11-4 |
| 修稿时间： | 1999年11月4日 |
EXPERIMENT ON DYNAMIC DAMAGE PROPERTY OF ROCK AND NEW DAMAGE MODEL FOR ROCK FRAGMENTATION BY BLASTING |
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| Yang Jun,Gao Wenxue,Jin Qiankun.EXPERIMENT ON DYNAMIC DAMAGE PROPERTY OF ROCK AND NEW DAMAGE MODEL FOR ROCK FRAGMENTATION BY BLASTING[J].Chinese Journal of Rock Mechanics and Engineering,2001,20(3):320-320. |
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| Authors: | Yang Jun Gao Wenxue Jin Qiankun |
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| Abstract: | The new parameters for describing damage and its evolution in rock are explored to construct damage model of rock fragmentation by blasting. The shock induced damage experiments are carried out and the ultrasonic signals in the damaged rocks are measured. The results show that the shock induced damage of rock is related to the attenuation coefficient of sonic wave. Considering the relationship of the attenuation of wave and damage energy dissipation, a new rock damage model is developed for rock blasting. Comparing the experiment data of light gas gun with the simulating results by the new models, it is verified that the new model can better reveal the dynamic course of rock fragmentation by blasting. |
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| Keywords: | rock blasting damage model dynamic loading damage variation sonic wave measurement attenuation coefficient |
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