| 高压水射流破碎高围压岩石损伤场的数值模拟 |
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| 引用本文： | 刘佳亮,司鹄.高压水射流破碎高围压岩石损伤场的数值模拟[J].重庆大学学报(自然科学版),2011,34(4):40-46. |
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| 作者姓名： | 刘佳亮 司鹄 |
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| 作者单位： | 刘佳亮,LIU Jia-liang(重庆大学资源及环境科学学院矿业工程,重庆,400044);司鹄,SI Hua(重庆大学资源及环境科学学院矿业工程,重庆,400044;重庆大学西南资源开发及灾害控制教育部重点实验室,重庆,400044) |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 利用ALE(arbitrary lagrange-euler)算法,考虑到一般情况下岩石处于高围压状态,建立了高压水射流冲击高围压岩石的数值模型.分析了高压水射流冲击下高围压岩石的损伤演化过程,指出岩石破碎过程呈阶跃式;通过对比无围压状态下岩石和高围压状态下岩石在高压水射流作用下破碎坑演化情况,指出处于高围压状态下的岩石损伤沿轴向的演化速率明显低于无围压状态下的岩石,沿径向的损伤演化受围压影响较小.通过分析4个典型单元在不同速度射流冲击下损伤演化情况,表明在提高射流速度可明显提高射流破岩效率,并在理论上对射流速度与射流破岩性能的关系进行了解释.
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| 关 键 词： | 数值模拟 高压水射流 围压 损伤 |
| 收稿时间： | 2010/10/12 0:00:00 |
Numerical simulation on damage field of high pressure waterjet breaking rock under high ambient pressure |
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| LIU Jia-liang and SI Hu.Numerical simulation on damage field of high pressure waterjet breaking rock under high ambient pressure[J].Journal of Chongqing University(Natural Science Edition),2011,34(4):40-46. |
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| Authors: | LIU Jia-liang and SI Hu |
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| Institution: | LIU Jia-lianga,SI Hua,b(a.Department of Mineral Engineering,b.Key Laboratory for the Exploration of Southwestern Resource & Environmental Disaster Control Engineering,Ministry of Education,Chongqing 400044,P.R.China) |
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| Abstract: | This paper uses ALE algorithm to develop a numerical model of breaking rock under high pressure water jet,in consideration of rock in a state of high ambient pressure.The simulation results show that damage evolution speed along axial direction of rock under high ambient pressure is lower than rock without ambient pressure,and ambient pressure has less impact on the damage evolution speed along radial direction.Through analyzing damage evolution of four typical element under water jet with different speed,i... |
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| Keywords: | numerical simulation high pressure water jet ambient pressure damage |
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