| 岩体爆破损伤计算公式的改进 |
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| 作者姓名： | 钟冬望 何 理 殷秀红 |
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| 作者单位： | 武汉科技大学理学院,湖北 武汉,430065;武汉科技大学资源与环境工程学院,湖北 武汉,430081,武汉科技大学理学院,湖北 武汉,430065;武汉科技大学资源与环境工程学院,湖北 武汉,430081,武汉科技大学理学院,湖北 武汉,430065 |
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| 基金项目： | 国家自然科学基金资助项目(50774056,51174147)；湖北省自然科学基金重点资助项目(2012FFA135);武汉科技大学研究生创新基金资助项目(JCX0017). |
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| 摘 要： | 岩体爆破损伤具有时变累积特性,且爆破损伤增量大小是以本次爆破作用前岩体宏观力学参数水平为前提,据此对经典爆破损伤计算公式进行改进。工程应用情况表明:岩体爆破损伤经典算法的计算结果偏于保守,在一定程度上会阻碍爆破开挖效益最大化;爆破损伤改进算法可反映岩体内部孔洞、裂隙等缺陷在爆破动荷载作用下的闭合、密实现象,且更能体现岩体中声波速度的变化幅度,其工程应用效果良好。
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| 关 键 词： | 爆破损伤 岩体 时变累积特性 爆破振动 声波测试 |
Improvement of calculation formula for rock blasting damage |
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| Authors: | Zhong Dongwang He Li and Yin Xiuhong |
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| Institution: | College of Science, Wuhan University of Science and Technology, Wuhan 430065, China;College of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China,College of Science, Wuhan University of Science and Technology, Wuhan 430065, China;College of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China and College of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China |
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| Abstract: | Considering the time-varying cumulative characteristics of rock blasting damage and the value of damage increment which depends on the macro-mechanical parameters of rock mass before current blasting effect, this paper improves the classical formula for calculating blasting damage. The engineering application shows that the classical method obtains conservative results, which may hinder the maximum benefits of blasting excavation. The new method can reflect the closure and densification phenomenon of micro-cracks and holes in rock mass under the dynamic blasting loading, and embody the change amplitude of acoustic wave velocity in rock mass. So the improved formula for blasting damage has better application effect. |
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