| 巷道多块体岩梁顶板变形破坏过程分析 |
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| 引用本文： | 李英明,贾安立,马念杰.巷道多块体岩梁顶板变形破坏过程分析[J].中国安全生产科学技术,2014(3):5-10. |
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| 作者姓名： | 李英明 贾安立 马念杰 |
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| 作者单位： | [1]安徽理工大学煤矿安全高效开采省部共建教育部重点实验室,安徽淮南232001; [2]安徽理工大学矿业工程博士后科研流动站,安徽淮南232001; [3]河南煤化集团赵固一矿,河南新乡453634; [4]中国矿业大学北京资源与安全工程学院,北京100083 |
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| 基金项目： | 国家自然科学基金（51004002）;中国博士后科学基金（2013M541812） |
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| 摘 要： | 针对巷道顶板岩层常受节理裂隙等各种软弱结构面切割,而形成外形似梁、实际是拱的多块体平衡岩梁结构,采用数值模拟方法,研究了巷道顶板多块体岩梁变形破坏过程,揭示了多块体岩梁的变形失稳机制及其过程中应力调整变化规律。研究结果表明:多块体梁回转危险截面为靠近跨中结构面;压应力部分的应力分布形态基本接近三角形;在达到极限状态时,整体形状由曲线变为折线。该结果对确定多块体梁的承载能力、维持平衡条件,进而进行巷道支护参数定量设计有重要的理论意义。
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| 关 键 词： | 多块体岩梁 数值模拟 层状顶板 变形 |
Analysis on deformation and destruction process of multiple blocks rock beam in roadway |
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| Institution: | LI Ying-ming, JIA An-li, MA Nian-jie ( 1. The MOE Key Laboratory of Coalmine Safety and High Efficiency Mining, Anhui University of Science and Technology, Huainan Anhui 232001, China; 2. Mining engineering center for post-doctoral studies Anhui University of Science and Technology, Huainan Anhui 232001, China; 3. Zhaogu No. 1 Coal Mine,Henan Coal Chemical Industry Group Co. Ltd. , Xinxiang Henan 453634, China; 4. School of Resources and Safety Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China) |
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| Abstract: | Roadway roof has often been cut by weak planes such as cleat or fracture, and it will form multiple block balanced rock beam structure which is like beam in appearance but is arch virtually. The deformation and destruc- tion course of multiple block rock beam were studied by numerical simulation. The deformation, instability mecha- nism and stress regularity of multiple blocks rock beam were revealed. It showed that the gyroscopic dangerous sec- tion of multiple blocks beam is the plane near the middle of span, the pressure stress is distributed as triangle and the whole shape is from curve to polygonal line on the condition of limit state. The findings have great significance to determine the bearing capacity and balanced condition of multiple blocks beam and to design quantitatively the supporting parameters of roadway. |
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| Keywords: | muhiple blocks rock beam numerical simulation stratified roof deformation |
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