| 刚-柔耦合支护巷道围岩应力波传播和衰减规律及试验分析 |
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| 引用本文： | 吕祥锋,潘一山.刚-柔耦合支护巷道围岩应力波传播和衰减规律及试验分析[J].工程力学,2013(1):345-349. |
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| 作者姓名： | 吕祥锋 潘一山 |
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| 作者单位： | 辽宁工程技术大学力学与工程学院;中国矿业大学深部岩土力学与地下工程国家重点实验室 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)项目(2010CB226803);中国矿业大学深部岩土力学与地下工程国家重点实验室开放基金项目(SKLGDUEK1010) |
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| 摘 要： | 支护巷道围岩冲击破坏及防治一直是采矿工程中难以解决的问题。对冲击应力波在支护巷道中的传播和衰减过程进行分析,分别得到了冲击应力波作用巷道围岩、刚性支护巷道和刚-柔耦合支护巷道发生破坏的应力判据和能量条件。采用低能爆炸加载方式,利用高速数据采集方法(数字散斑观测),对炮孔距离巷道顶部为200mm,硝铵炸药量为6.0g条件下裸巷和刚-柔耦合支护巷道冲击破坏过程进行监测,得到了裸巷和刚-柔耦合支护巷道表面散斑场变形破坏特征。试验结果说明了刚-柔耦合支护可有效缓冲动态载荷、吸收冲击能量,也为防治巷道冲击破坏提供了一种新方法。
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| 关 键 词： | 刚-柔耦合支护 应力波衰减 巷道围岩 冲击破坏 试验分析 |
STRESS WAVE PROPAGATION AND DECAY LAW AND TEST ANALYSIS OF SURROUNDING ROCK BY RIGID-FLEXIBLE COUPLING SUPPORT |
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| L Xiang-feng,PAN Yi-shan.STRESS WAVE PROPAGATION AND DECAY LAW AND TEST ANALYSIS OF SURROUNDING ROCK BY RIGID-FLEXIBLE COUPLING SUPPORT[J].Engineering Mechanics,2013(1):345-349. |
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| Authors: | L Xiang-feng PAN Yi-shan |
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| Affiliation: | 1(1.School of Mechanics and Engineering,Liaoning Technical University,Fuxin,Liaoning 123000,China;2.State Key Laboratory for GeoMechanics and Deep Underground Engineering,China University of Mining & Technology,Xuzhou,Jiangsu 221008,China) |
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| Abstract: | Impact damage and prevention of surrounding rock are always the difficult problem to solve in mining engineering.By the analysis on stress wave propagation and decay law of surrounding rock supported by a rigid-flexible coupling support,the stress criterion and energy conditions of roadway destruction under a naked lane,rigid support roadway and rigid-flexible coupling support roadway by impact wave are received.Using a digital speckle correlation method(DSCM),the impact failure process of a naked lane and rigid-flexible coupling support roadway by a low-energy explosive load is monitored under the condition of explosive quantity 6.0g,blast hole distance of 200mm.the deformation and failure roadway speckle field test results show that a rigid-flexible coupling support can effectively buffer dynamic loads,absorb impact energy,and provide a new method for prevention roadway destructions. |
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| Keywords: | rigid-flexible coupling support stress wave attenuation surrounding rock shock damage experimental analysis |
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