| 节理几何特征对预裂爆破效果影响的数值模拟 |
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| 引用本文： | 谢冰,李海波,王长柏,刘亚群,夏祥,马国伟.节理几何特征对预裂爆破效果影响的数值模拟[J].岩土力学,2011,32(12):3812-3820. |
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| 作者姓名： | 谢冰 李海波 王长柏 刘亚群 夏祥 马国伟 |
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| 作者单位： | 1.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；2.洛阳理工学院 土木工程系，河南 洛阳 471003； 3.安徽理工大学 土木建筑学院，安徽 淮南 232001；4.南洋理工大学 土木与环境学院，新加坡 639798 |
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| 基金项目： | 国家自然科学基金资助项目，十一五科技支撑计划课题，河南省教育厅自然科学研究计划项目 |
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| 摘 要： | 运用有限元软件AUTODYN 2D计算爆炸荷载与离散元软件UDEC模拟节理岩体相结合的方法研究了节理几何特征对预裂爆破的影响。通过计算可知，预裂爆破时炮孔间的节理组对预裂成缝的影响明显，当节理法线与炮孔连线夹角在一定范围内时，预裂缝沿炮孔连线方向的平直程度随节理与炮孔连线夹角的增大而逐渐趋于平直，其中当节理组与炮孔连线夹角为90°时成缝效果最好，裂缝与炮孔连线基本重合，与理论分析较一致；节理间距对预裂爆破有较大影响，相同条件下节理间距越小，越难形成连通裂缝，减小炮孔间距有利于小节理间距情况下的预裂缝贯通
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| 关 键 词： | 离散元 爆炸荷载 节理岩体 预裂爆破 裂缝 |
| 收稿时间： | 2010-06-01 |
Numerical simulation of presplit blasting influenced by geometrical characteristics of joints |
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| XIE Bing,LI Hai-bo,WANG Chang-bai,LIU Ya-qun,XIA Xiang,MA Guo-wei.Numerical simulation of presplit blasting influenced by geometrical characteristics of joints[J].Rock and Soil Mechanics,2011,32(12):3812-3820. |
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| Authors: | XIE Bing LI Hai-bo WANG Chang-bai LIU Ya-qun XIA Xiang MA Guo-wei |
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| Institution: | 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. Department of Civil Engineering, Luoyang Institute of Science and Technolegy, Luoyang, Henan 471003, China; 3. School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan, Anhui 232001, China; 4. School of Civil & Environmental Eengineering, Nanyang Technological University, 639798 Singapore |
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| Abstract: | The result of presplit blasting influenced by geometrical characteristics of joints are combining studied by the software AUTODYN 2D and UDEC.By calculating,the impact of geometrical characteristics of joints can be found through the crack extension between the blasting hole.The straight level of the cracks between the blasting hole are gradually enhanced with the increasing of angle between the joints and the borehole connection;and the angle of 90-degree can get the best result that the crack will be coin... |
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| Keywords: | discrete element method blasting load jointed rock mass presplit blasting crack |
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