| 摘要: |
| 通过水中爆炸激波对试样的损伤试验来模拟激波对地层岩石的破坏作用。试验中观测了爆炸后试样内部裂 纹形貌的分布,利用自制传感器测到了试样内部的激波压力,优化筛选出了损伤度模型。通过对试样弹性波速进行 处理和分析，给出了试样的动态损伤阈值求解方法。结果表明，激波在试样中的传播符合指数衰减规律,相对损伤 度、无量纲波速的平方、无量纲拉应力它们两两之间呈线性关系。 |
| 关键词: 激波 岩石损伤 试验研究 相对损伤度 无量纲波速 无量纲拉应力 |
| DOI： |
| 分类号: |
| 基金项目:国家“863”计划项目(2007AA06Z208)冲闻石油化工股份有限公司资助项目(P03051)冲国石油大学研究生创新基金项目(S2005-53) |
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| Rock damage experiment and evaluation method by exploding wave |
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JIANG Jin-bao1,2,LIN Ying-song1,3,ZHANG Bao-kang1,LIU Zhao-nian1,DING Yan-sheng3
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(1. College of Petroleum Engineering in China University of Petroleum，Dongying 257061, Shandong Province, Chirm ;2. Drilling Research Institute, Zhongyuan Petroleum Exploration Bureau，Puyang 457001，Henan Province, China;3. Institute of Mechanics, Chinese Academy of Sciences, Beijing 100081, China)
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| Abstract: |
| The sample damage experiment by exploding wave in water, which is used to simulate the rock damage by exploding wave in reservoir，was carried out. The fractures distribution rule in sample was observed. The -exploding wave pressure was measured by self-made sensor, and the selected damage model was optimized. By treating and analyzing the elastic wave velocity data，the solution method for dynamic damage threshold was obtained. The results show that the rule of exploding wave propagation in sample accords with exponential damping，and a linear relationship exists among relative damage, the square of dimensionless elastic wave velocity and diraensioniess tensile stress. |
| Key words: exploding wave rock damage experimental research relative damage dimensionless wave velocity dimensionless tensile stress |
