| 基于声速变化的岩体爆破累积损伤效应 |
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| 引用本文： | 闫长斌.基于声速变化的岩体爆破累积损伤效应[J].岩土力学,2010,31(Z1):187-192. |
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| 作者姓名： | 闫长斌 |
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| 作者单位： | 黄河勘测规划设计有限公司,郑州,450003 |
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| 基金项目： | 国家"十一五"科技支撑计划，黄河勘测规划设计有限公司自主研究开发项目 |
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| 摘 要： | 声速变化是表征损伤变量的有效参数。为揭示岩体爆破累积损伤效应及损伤演化规律,在某地下工程中开展了反复爆破作用下围岩损伤的声波测试,并对测试数据进行了回归分析。在此基础上,分析了多次爆破作用下岩体损伤与声速变化的对应关系,建立了以岩体声速降低率为基准量的岩体爆破累积损伤扩展模型。研究表明:(1)回归分析的相关系数大于0.9816,说明岩体爆破损伤非线性累积回归预测模型是正确的;(2)岩体爆破累积损伤模型将岩体损伤总量定义为初始损伤和爆破损伤之和,综合考虑了爆破损伤累积效应和岩体初始损伤的影响,能够真实反映岩体损伤程度,是合理可行的。
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| 关 键 词： | 爆破 声速变化 回归分析 累积损伤模型 |
| 收稿时间： | 2010-04-23 |
Blasting damage cumulative effect of rock mass based on sound velocity variation |
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| YAN Chang-bin.Blasting damage cumulative effect of rock mass based on sound velocity variation[J].Rock and Soil Mechanics,2010,31(Z1):187-192. |
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| Authors: | YAN Chang-bin |
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| Institution: | Yellow River Engineering Consulting Co., Ltd., Zhengzhou 450003, China |
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| Abstract: | Sound velocity variation is the valid parameter as the token of damage variance. In order to discover the blasting damage cumulative effect and the damage evolutive law of rock mass, sound wave measurement for surrounding rock damage under blasting time after time was carried out at some underground engineering; and the data regression was analyzed at the same time. The corresponding relation between rock mass damage and sound velocity variation under several times blasting was analyzed; and the cumulative expanded models of rock mass blasting damage with the baseline of rock mass sound velocity reducing ratio were founded. Research results show that the correlation coefficient of regression analysis is more than 0.981 6, which illuminate the nonlinear cumulative regression forecast models of rock mass blasting damage founded by test results are correct. The final quantity of rock mass damage is the total of initial damage and blasting damage in the cumulative expanded models of rock mass blasting damage, and where the influences of blasting cumulative damage effect and initial damage are synthetically considered. So the models can reflect the damage degree of rock mass veritably, which are reasonable and feasible. |
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| Keywords: | blasting sound velocity variation regression analysis cumulative damage models |
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