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| 爆炸作用下岩石破裂块度分布特点及其物理机理 | |
| 引用本文： | 戚承志,王明洋,钱七虎,罗健.爆炸作用下岩石破裂块度分布特点及其物理机理[J].岩土力学,2009,30(Z1):1-4. |
| 作者姓名： | 戚承志 王明洋 钱七虎 罗健 |
| 作者单位： | 1. 北京建筑工程学院,土木交通学院,北京,100044;解放军理工大学,工程兵工程学院,南京,210007 2. 解放军理工大学,工程兵工程学院,南京,210007 3. 北京建筑工程学院,土木交通学院,北京,100044 |
| 基金项目： | 国家自然基金项目，北京市教委及北京自然基金项目 |
| 摘 要： | 就岩石在爆炸载作用下破坏块度分布的物理机理进行了分析.从分析可以看出,岩石破坏块度的对数正态分布与材料的多重破坏有关.在封闭爆炸情况下这种分布描述爆心附近岩石破坏块度的分布,此处材料处于静水压力状态,应变率很高,材料的破坏为多重破坏.而Rosin-Rammler分布主要描述离爆心较远处岩石破坏的块度分布,此处岩石的破坏主要是由环向拉力引起的径向裂纹所致,以单重破坏为主. |
| 关 键 词： | 块度分布 单重破坏 多重破坏 |
| 收稿时间： | 2008-04-18 |
Features and physical mechanism of fragmentation distribution of rock under explosion |
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| QI Cheng-zhi,WANG Ming-yang,QIAN Qi-hu,LUO Jian.Features and physical mechanism of fragmentation distribution of rock under explosion[J].Rock and Soil Mechanics,2009,30(Z1):1-4. | |
| Authors: | QI Cheng-zhi WANG Ming-yang QIAN Qi-hu LUO Jian |
| Institution: | 1. School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China; 2. Engineering Institute of Cops of Engineers, PLA University of Science and Technology, Nanjing, 210007, China |
| Abstract: | Physical mechanism of fragmentation distribution of rock mass under explosion is investigated. It is demonstrated that lognormal distribution is closely related to the multi-fold fracture of the material. In the case of contained explosion, lognormal distribution describes the fragmentation distribution of rock in the vicinity of explosion center where the material is under hydrostatic compression, the strain rate is high, and the fracture is multi-fold. While Rosin-Rammler distribution mainly describes the fragmentation distribution of rock mass beyond the vicinity of explosion center where the fracture is induced mainly by the tangential tensile stress, and the fracture is one-fold. |
| Keywords: | fragmentation distribution onefold fracture multi-fold fracture |
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