| 直墙拱形巷(隧)道岩爆试验及劈裂与剪切分析 |
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| 引用本文： | 张晓君,王 栋,肖 超,郑怀昌.直墙拱形巷(隧)道岩爆试验及劈裂与剪切分析[J].岩土力学,2013,34(Z1):35-40. |
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| 作者姓名： | 张晓君 王 栋 肖 超 郑怀昌 |
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| 作者单位： | 山东理工大学 资源与环境工程学院，山东 淄博 255049 |
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| 基金项目： | 山东理工大学青年教师发展支持计划经费资助；山东理工大学博士基金资助项目（No.4041410012） |
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| 摘 要： | 针对岩爆试验及监测研究的不足，开展了直墙半圆拱形巷（隧）道岩爆单轴压缩试验、声波监测及岩爆破裂的劈裂与剪切分析。结果表明，巷（隧）道围岩呈现起伏粗糙破裂面和劈裂后的薄块体，试样整体也呈现出明显的劈裂岩爆现象；波速可以很好地反映围岩内部损伤演化进程，将围岩波速由持续不变到开始变小点作为临界损伤点，可以通过监测波速变化进行围岩岩爆的预测预报；通过监测声波波形尤其是对波形稀疏、周期变长的监测，可以很好地掌握围岩内部的全程发展变化情况；通过综合监测声波的波速、波形稀疏、周期变长，达到定性、定量相结合，及时、准确地预测、预报岩爆，以保障人员、设备安全；得出了由应力强度比和压拉比来判定劈裂岩爆发生的综合表达式以及与应力强度比岩爆烈度分级标准相对应的压拉比数值；劈裂岩爆发生的应力强度比即应力判据在0.27～0.80之间（R为10～30时）；随着满足劈裂岩爆发生的应力强度比的增大，其越接近满足剪切破坏条件，破坏主要形式将向剪切破坏方向发展。
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| 关 键 词： | 直墙拱形巷(隧)道 岩爆 单轴压缩试验 声波监测 劈裂 波速 |
| 收稿时间： | 2013-04-18 |
Test of rockburst in straight-wall-top-arch roadways(tunnels) and its splitting and shearing failure analysis |
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| ZHANG Xiao-jun,WANG Dong,XIAO Chao,ZHENG Huai-chang.Test of rockburst in straight-wall-top-arch roadways(tunnels) and its splitting and shearing failure analysis[J].Rock and Soil Mechanics,2013,34(Z1):35-40. |
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| Authors: | ZHANG Xiao-jun WANG Dong XIAO Chao ZHENG Huai-chang |
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| Institution: | School of Resources and Environment，Shandong University of Technology，Zibo，Shandong 255049，China |
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| Abstract: | Aiming at the monitoring and test of rockburst, the uniaxial compression tests and acoustic monitoring of rockburst in straight-wall-top-arch roadways(tunnels) were carried out and on this basis rockburst splitting and shearing were discussed.The results show that the failure surface of surrounding rock is rough and showing thin splitting block and the whole sample is also showing a distinct splitting rockburst; wave velocity can reflect the rock damage evolution process; and wave velocity from constant to lessening can be used as the dot of critical damage for rockburst prediction which can be achieved by monitoring velocity variation; surrounding rock internal development and changes can be a very good grasp by monitoring the waveform, especially waveform sparse and periodic increase; combination of qualitative and quantitative monitoring by the comprehensive monitoring of sound velocity, waveform sparse and periodic increase can timely and accurately predict rockburst in order to protect personnel and equipment safety; comprehensive expression of splitting rockburst is developed by the stress intensity factor and the ratio of rock's compressive-tensile strength and the numerical value corresponding to rockburst intensity standard of stress intensity factor are developed; stress intensity factor criterion of splitting rockburst is between 0.27－0.80(R=10－30 ); shearing failure condition will be satisfied with the increase of stress intensity factor and the main failure form will develop in the direction of shearing failure. |
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| Keywords: | straight-wall-top-arch roadways(tunnels) rockburst uniaxial compression test acoustic monitoring splitting wave velocity |
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