| 基于断裂力学的岩爆破坏形迹两级预测方法研究 |
| |
| 引用本文： | 陈培帅,陈卫忠,庄严.基于断裂力学的岩爆破坏形迹两级预测方法研究[J].岩土力学,2013,34(2):575-584. |
| |
| 作者姓名： | 陈培帅 陈卫忠 庄严 |
| |
| 作者单位： | 1.中交二航局技术中心 长大桥梁建设施工交通行业重点实验室，武汉 430040； 2.中国科学院武汉岩土力学研究所 岩土力学与工程国家重点实验室，武汉 430071；3.中铁第一勘察设计院桥隧处，西安 710043 |
| |
| 基金项目： | 国家高技术研究发展专项经费（863计划）（No. 2007AA11Z108）；中国科学院“西部行动计划高新技术”项目（No. KGCX2-YW-506） |
| |
| 摘 要： | 根据常规的岩爆判据，可以确定岩爆的大致分布区域，但难以得到岩爆的破坏形迹（Damaged Shape of Rockburst，DSR），为此根据岩爆的特点，推导了裂纹失稳扩展的临界长度和临界应力条件，提出了计算DSR的两级预测方法：通过裂纹失稳扩展时的临界应力，对DSR进行一级预测；在一级预测的DSR范围内加入预设裂纹，进行DSR的二级预测。针对断裂数值模拟方法的缺点，建立了基于扩展有限元（XFEM）模拟裂纹动态扩展的思路，依托ABAQUS平台，建立了XFEM二次开发的分析框架，编制了扩展有限元分析程序，进行了相关的实例验证；结合依托工程嘎隆拉隧道，从岩爆的机制、裂纹的数值仿真等方面开展研究，研究成果对高地应力地下工程的岩爆预测具有一定的参考意义。
|
| 关 键 词： | 高地应力 岩爆 岩爆破坏形迹 扩展有限元 断裂力学 极限储存能 ABAQUS |
| 收稿时间： | 2011-11-09 |
Forecasting of rockburst with two-step method based on fracture mechanics |
| |
| CHEN Pei-shuai,CHEN Wei-zhong,ZHUANG Yan.Forecasting of rockburst with two-step method based on fracture mechanics[J].Rock and Soil Mechanics,2013,34(2):575-584. |
| |
| Authors: | CHEN Pei-shuai CHEN Wei-zhong ZHUANG Yan |
| |
| Institution: | 1. Key Laboratory of Large-span Bridge Construction Technology, Ministry of Communication, Technology Center CCCC Second Harbour Engineering Co., Ltd., Wuhan 430040, China; 2. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 3. Bridge and Tunnel Engineering Division , the 1st Survey and Design Institute of China Railways , Xi’an 710043, China |
| |
| Abstract: | According to the conventional rockburst criteria, it is easy to determine the approximate area of rockburst. However, the damaged shape of rockburst (DSR) can not be computed based on these theories. This paper puts forward a method of simulating rockburst. The first stage of predicting DSR can be studied through critical stress. Then the second stage can be done by introducing pre-existed crack. Finally the scope of rockburst can be got through extended finite element method (XFEM). This problem can be overcome relying on the secondary development of ABAQUS. Through a model of fracture mechanics, it is easy to verify the feasibility and accuracy of XFEM. The DSR of Galongla can be got through simulation technology. And the result can provide guidance for the construction of underground project to prevent rockburst. |
| |
| Keywords: | high geostress rock burst DSR XFEM fracture mechanics limit energy ABAQUS |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
