| 基于加卸载响应比的载荷岩石动力学特征试验研究 |
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| 引用本文： | 苗胜军,樊少武,蔡美峰,陈长臻. 基于加卸载响应比的载荷岩石动力学特征试验研究[J]. 煤炭学报, 2009, 34(3): 329-333 |
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| 作者姓名： | 苗胜军 樊少武 蔡美峰 陈长臻 |
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| 作者单位： | 北京科技大学 土木与环境工程学院，北京,100083 |
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| 基金项目： | 高等学校博士学科点专项科研基金 |
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| 摘 要： | 利用单轴循环加卸载扰动试验，在不同应力水平对岩石试件施加幅度较小、周期较短的循环扰动荷载，得到试件在不同应力条件下扰动时的应力-应变状态，同时利用声发射监测设备对加卸载过程中试件内部损伤演化过程进行记录.试验显示，加卸载响应比值Y的变化特性与岩体所处的应力状态及其稳定程度相关，当荷载水平较低时，加卸载响应比值Y接近于1，试件比较稳定；而当荷载水平较高，接近试件破坏的临界状态时，加卸载响应比值会急剧增加，所以可以用加卸载响应比理论定量地分析岩石试件损伤演化过程，为扰动致灾动力学机理、诱发模式及预测预报提供试验基础.
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| 关 键 词： | 加卸载响应比 载荷岩石；扰动荷载；声发射；损伤演化过程, |
| 收稿时间： | 2008-12-11 |
Dynamic characteristics experiment study of loading rock based on theory of load/unload response ratio |
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| MIAO Sheng-jun,FAN Shao-wu,CAI Mei-feng,CHEN Chang-zhen. Dynamic characteristics experiment study of loading rock based on theory of load/unload response ratio[J]. Journal of China Coal Society, 2009, 34(3): 329-333 |
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| Authors: | MIAO Sheng-jun FAN Shao-wu CAI Mei-feng CHEN Chang-zhen |
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| Affiliation: | 1.Civil and Environmental Engineering School;University of Science and Technology Beijing;Beijing 100083;China;2.Beijing Research Institute of Mine Safety Technology;China Coal Research Institute;Beijing 100013;3.Heze Energy and Chemical Company;Yanzhou Mining Corporation;Heze 274900;China |
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| Abstract: | Stress and strain of rock samples were got under small-amplitude and short-period repetitive disturbing load with different stress conditions through uniaxial compression experiment.And rock-interior gradual damage evolution was monitored by acoustic emission testing system in the course of load/unload.The experiment shows that change characteristics of load/unload response ratio(LURR) is relate to stress state and stability of the rock mass.The LURR is close to 1 at low load level,and rock samples are stab... |
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| Keywords: | load/unload response ratio loading rock disturbing load acoustic emission damage evolution |
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