| 空气间隔装药爆炸冲击荷载作用下混凝土损伤分析 |
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| 引用本文： | 吴亮,钟冬望,卢文波.空气间隔装药爆炸冲击荷载作用下混凝土损伤分析[J].岩土力学,2009,30(10):3109-3114. |
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| 作者姓名： | 吴亮 钟冬望 卢文波 |
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| 作者单位： | 1. 武汉科技大学,理学院,武汉,430081
2. 武汉大学,水资源与水电工程科学国家重点试验室,武汉,430072 |
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| 基金项目： | 国家自然科学基金，湖北省自然科学基金，武汉科技大学校科学基金资助项目 |
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| 摘 要： | 采用JHC混凝土损伤演化模型，模拟计算了不同空气间隔装药结构情况下炮孔近区岩石损伤破坏机制，分析了空气层比例以及起爆方式对爆破效果的影响。计算表明，不同空气层位置及比例会产生不同的爆破效果，并能运用于不同的爆破目的。空气层比例与炮孔粉碎区大小成反比，空气比较小时可以用于梯段爆破，而空气比较大时可用于预裂或光面爆破。对于梯段爆破、反向起爆（空气层位于上部）和中间起爆（空气层位于中间）的效果要好；起爆方式对梯段爆破效果的影响要比预裂和光面爆破效果明显。
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| 关 键 词： | 空气间隔装药 爆炸冲击荷载 混凝土损伤 起爆方式 数值模拟 |
| 收稿时间： | 2008-11-28 |
Study of concrete damage under blast loading of air-decking |
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| WU Liang,ZHONG Dong-wang,LU Wen-bo.Study of concrete damage under blast loading of air-decking[J].Rock and Soil Mechanics,2009,30(10):3109-3114. |
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| Authors: | WU Liang ZHONG Dong-wang LU Wen-bo |
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| Institution: | 1. College of Science, Wuhan University of Science and Technology, Wuhan 430081, China; 2. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China |
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| Abstract: | Based on the JHC (Johnson-Holmquist-Cook) model of concrete damage evolution, rock damage and failure mechanism of blast-hole near-field in different air-decking charge structures is studied by numerical simulation. The influence of air-decking ratio and detonating manner on blasting effect is analyzed as well. Result shows different blasting effects can be caused by different air-decking position and ratio, which can be used for different purposes. Air-decking ratio is in inverse proportion to the size of crush-field of blast-hole. With low air-decking ratio, bench blasting can be used; while with high air-decking ratio, re-splitting blasting and smooth blasting is more preferable. For bench blasting, indirect initiation (top-air-decking charge structure) and middle initiation (middle-air-decking charge structure) is more appropriate; the influence of detonating manner on bench blasting is more prominent than on re-splitting blasting and smooth blasting. |
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| Keywords: | air-decking blast loading concrete damage detonating manner numerical simulation |
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