| 超高压水射流冲蚀切割岩石断口微观断裂机理实验研究 |
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| 引用本文： | 李根生,廖华林. 超高压水射流冲蚀切割岩石断口微观断裂机理实验研究[J]. 高压物理学报, 2005, 19(4): 337-342 |
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| 作者姓名： | 李根生 廖华林 |
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| 作者单位： | 1. 中国石油大学(北京)石油天然气工程学院,北京,102249
2. 中国石油大学(华东)石油工程学院,山东,东营,257061 |
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| 基金项目： | 国家自然科学基金重点项目（50234030）;国家杰出青年科学基金（50125413） |
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| 摘 要： | 由于岩石破碎过程的复杂性，目前对水射流的破岩机理的认识仍然不十分清楚。先采用超高压万能水射流切割机冲蚀切割岩石，然后用扫描电镜对水射流切割岩石断口形貌进行观测，分析了岩石在超高压水射流作用下的破坏形式。观测分析表明，超高压射流切割岩石形成的切槽主要有长形规则和漏斗状两种形状。岩石在水射流作用下的破坏机制主要有拉伸破坏和剪切破坏两种，剥落岩块以穿晶断裂为主，其微观断裂机制是脆性拉伸破坏；切槽凹侧面主要是剪切错动，其微观破坏机制是剪脆性破坏。实验为水射流破岩机理分析提供了实测依据。
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| 关 键 词： | 水射流 岩石切割 破坏机制 扫描电镜 |
| 文章编号： | 1000-5773（2005）04-0337-06 |
| 收稿时间： | 2004-10-19 |
| 修稿时间： | 2005-01-17 |
Micro-Failure Mechanism Analysis and Test Study for Rock Failure Surface under Water Jet Impact |
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| LI Gen-Sheng,LIAO Hua-Lin. Micro-Failure Mechanism Analysis and Test Study for Rock Failure Surface under Water Jet Impact[J]. Chinese Journal of High Pressure Physics, 2005, 19(4): 337-342 |
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| Authors: | LI Gen-Sheng LIAO Hua-Lin |
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| Affiliation: | 1. Faculty of Petroleum Engineering, China University of Petroleum, Beijing 102249, China; 2. College of Petroleum Engineering, China University of Petroleum, Dongying 257061, China |
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| Abstract: | The rock breaking mechanism by water jets impact has not been clearly recognized as yet for complicated process of rock damage.The test of cutting rocks with submerged high-pressure water jets impact by a numerical controlling jet cutting machine are conducted.Then,the test for the pattern of failure surface of cutting slots and dilapidated slices are performed with scanning electron microscope(SEM) to study micro failure mechanism of rocks with water jets impinging.The result shows two types of rectangle shape and shallow funnel shape craters in the rock matrixes.The analysis shows that the micro-mechanism of rock failure due to water jets impingement is a brittle fracture in the condition of tensile and shearing stress. |
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| Keywords: | water jets rock cutting breaking mechanism SEM |
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