| 剪应力对巷道破坏影响的研究 |
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| 引用本文： | 王继强. 剪应力对巷道破坏影响的研究[J]. 山西煤炭, 2010, 30(3): 49-51 |
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| 作者姓名： | 王继强 |
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| 作者单位： | 西北综合勘察设计研究院,陕西,西安,710003 |
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| 摘 要： | 根据岩石破坏的库仑-莫尔强度准则,分析了巷道围岩的剪应力分布规律及其导致岩体破坏的机理.研究表明:在巷道围岩内存在一个应力剪切带,剪切带内具有较大的主应力差值,该区域岩体有发生破坏的趋势.剪切带是围岩应力状态的过渡区域,它使围岩从单向、双向应力状态过渡到稳定的三向应力状态.巷道支护的原则就是控制剪切带的发展.在锚杆支护设计中,若锚杆主要起悬吊作用,而锚杆的锚固区若处于剪切带内,那么对围岩的支护将是不可靠的.
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| 关 键 词： | 岩石破坏 剪切应力 破坏准则 巷道 |
Influence of Shear Stress on The Failure of Laneway |
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| WANG Ji-Qiang. Influence of Shear Stress on The Failure of Laneway[J]. Shanxi Coal, 2010, 30(3): 49-51 |
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| Authors: | WANG Ji-Qiang |
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| Affiliation: | WANG Ji-Qiang(Northwest Reserch Institute of Engineering Investigations, Design,Xi'an 710003 China) |
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| Abstract: | Based on the Coulomb-Mohr strength criterion of rock failure,analyzed the distribution rule of the shear stress of laneway surrounding rock mass and the failure mechanism of rock mass.The research results show that:there is a obvious stress shear band in laneway surrounding rock mass,and the surrounding rock mass has failure tendency.The shear band is a transition area of the stress state of surrounding rock mass,it make the stress state of surrounding rock mass transfer to three-dimensional stress state fr... |
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| Keywords: | rock failure shear stress failure criterion laneway |
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