| 侧爆作用下硐室锚杆受力动态响应数值分析 |
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| 引用本文： | 王光勇,吕小师,王超,余永强.侧爆作用下硐室锚杆受力动态响应数值分析[J].地下空间与工程学报,2016,12(6):1511-1515. |
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| 作者姓名： | 王光勇 吕小师 王超 余永强 |
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| 作者单位： | 1. 河南理工大学 深部矿井建设重点学科开放实验室,河南 焦作 454000;
2. 中国科学技术大学 近代力学系,合肥 230026;
3. 安阳师范学院 基建处,河南 安阳 455000 |
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| 基金项目： | 河南省科技攻关(142102210433);河南省教育厅科学技术研究重点项目科技攻关计划(14A440003);深部矿井建设省级重点实验室开放基金(2014KF-05) |
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| 摘 要： | 利用数值分析软件LS-DYNA3D, 研究了在侧爆应力波的作用下硐室锚杆支护受力动态响应。数值分析结果表明:通过对比相同比例距离的试验和数值模拟压应力时程曲线,说明数值模拟结果可信;基于不同位置锚杆中间单元轴向应力时程曲线分析,发现迎爆侧受到应力波的作用明显大于背爆侧;迎爆侧侧墙锚杆既受压又受拉,并且锚杆8受压最大;受拉较强部位主要集中在迎爆侧,锚杆7拉应力峰值最大;从锚头到锚端锚杆拉应力峰值和压应力峰值都是先增加再减小,最大压应力峰值偏向锚端,而最大受拉位置与应力波的幅值和波长有关。
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| 关 键 词： | 岩石力学 侧爆 锚杆 动态响应 数值分析 |
| 收稿时间： | 2016-03-18 |
Numerical Analysis on the Dynamic Stress Response of Rock Bolts Reinforced Cavern under Adjacent Blasting |
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| Wang Guangyong,Lv Xiaoshi,Wang Chao,Yu Yongqiang.Numerical Analysis on the Dynamic Stress Response of Rock Bolts Reinforced Cavern under Adjacent Blasting[J].Chinese Journal of Underground Space and Engineering,2016,12(6):1511-1515. |
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| Authors: | Wang Guangyong Lv Xiaoshi Wang Chao Yu Yongqiang |
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| Affiliation: | 1. Opening Project of Key Laboratory of Deep Mine Construction,Henan Polytechnic University,Jiaozuo,Henan 454000,P.R.China;
2. Department of Modern Mechanics, University of Science and Technology of China, Hefei 230026, P.R.China 3. Infrastructure Management Department, Anyang Normal University, Anyang, Henan 455000, P.R.China |
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| Abstract: | Based on LS-DYNA3D software, the dynamic stress response of rock bolts reinforced cavern was studied under the stress waves of adjacent blasting. The results show that numerical results are reliable by comparing the time history curves of compressive test and numerical simulation on the same scaled distance. The time history curves of compressive stress for the middle element of rock bolts in different positions are analyzed, and the stress wave on blasting side is obviously stronger than that on back blasting side. The rock bolts on side wall of blasting side bear pressure and tension, while the others only bear tension. The maximum peak compressive pressure appears on the rock bolt eight. Tension concentrates on blasting side and that of the rock bolt seven is largest. According to axial stress distribution along the bolts from anchor head to anchorage, the peak tension and peak pressure increased firstly, then decreased, and the maximal peak pressure is near to anchorage. The location of the maximum peak tension is related to wave amplitude and wavelength. |
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| Keywords: | rock mechanics adjacent blasting rock bolts dynamic response numerical analysis |
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