| 深部巷道预应力协同支护数值分析 |
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| 引用本文： | 李元,刘刚,龙景奎.深部巷道预应力协同支护数值分析[J].采矿与安全工程学报,2011,28(2):204-208,213. |
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| 作者姓名： | 李元 刘刚 龙景奎 |
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| 作者单位： | 中国矿业大学力学与建筑工程学院,深部岩土力学与地下工程国家重点实验室,江苏,徐州,221116 |
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| 摘 要： | 为了改善深部巷道围岩稳定性难以控制这一现状,提出了锚杆、锚索预应力协同支护思想.采用数值模拟的方法对巷道预应力协同支护进行计算与分析.结果表明:在现有的实际支护条件下,高强锚杆需施加40 kN及以上的预应力才能与锚索100 kN以上的预应力相协同;当锚杆、锚索的预应力产生协同作用时,对深部巷道的支护效果明显,巷道周边的应力集中区范围明显减小,应力分布趋于均匀;同时锚杆、锚索的平均利用率都达到0.5以上,且它们之间相差不大,充分发挥了高强锚杆、锚索的受力特性,使锚杆、锚索协同工作,避免了单独依次受力.故应该采用协同支护理论作为深部巷道工程支护设计的理论依据.
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| 关 键 词： | 协同支护 预应力 锚杆 锚索平均利用率 数值模拟 |
Numerical Analysis of Theory of Pre-Stress Synergetic Support in Deep Mine Roadway |
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| LI Yuan,LIU Gang,LONG Jing-kui.Numerical Analysis of Theory of Pre-Stress Synergetic Support in Deep Mine Roadway[J].Journal of Mining and Safety Engineering,2011,28(2):204-208,213. |
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| Authors: | LI Yuan LIU Gang LONG Jing-kui |
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| Affiliation: | LI Yuan,LIU Gang,LONG Jing-kui(School of Mechanics & Civil Engineering,State Key Laboratory for Geomechanics & Deep UndergroundEngineering,China University of Mining & Technology,Xuzhou,Jiangsu 221116,China) |
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| Abstract: | In order to improve the actuality that the stability of surrounding rocks in deep roadway is difficult to control,we put forward the idea of bolt and cable's pre-stressing synergetic support.Using numerical simulation,we calculated and analyzed the deep roadway supported based on this idea.The results show that,under the current support condition,high-strength bolts must be used with a pre-stressing force greater than 40 kN to cooperate with cables with more than100 kN pre-stressing force.When the pre-stres... |
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| Keywords: | synergetic support prestress the utilization coefficient of bolt and cable numerical calculation |
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