| 磷块岩三轴压缩破坏特性与声发射规律的研究 |
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| 引用本文： | 涂 力1,张电吉1,潘 登1,吝曼卿1,邓天赐1,杨丹丹1,韩瑞庭1,姚金蕊2,何忠国2. 磷块岩三轴压缩破坏特性与声发射规律的研究[J]. 武汉工程大学学报, 2017, 39(6): 616-621 |
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| 作者姓名： | 涂 力1 张电吉1 潘 登1 吝曼卿1 邓天赐1 杨丹丹1 韩瑞庭1 姚金蕊2 何忠国2 |
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| 作者单位： | 1. 武汉工程大学资源与土木工程学院，湖北 武汉 430074；2. 贵州开磷有限责任公司，贵州 贵阳 550000 |
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| 摘 要： | 采用应力加载系统和声发射测试系统，研究了三轴压缩试验中磷块岩裂纹破坏特性及声发射活动规律. 试验及分析研究表明:磷块岩三轴声发射加载全过程可分为裂隙压密阶段、弹性压缩阶段、裂纹初级扩展阶段、裂纹剧烈扩展阶段、宏观破坏阶段；磷块岩声发射事件在其强度最大阶段和宏观破坏阶段均有产生；磷块岩声发射事件数随着围压从2 MPa增加到4 MPa而减少.
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| 关 键 词： | 磷块岩 三轴压缩试验 声发射 裂纹 破坏特性 |
Failure Characteristics and Laws of Acoustic Emission for Phosphorite Under Triaxial Loading |
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| TU Li1,ZHANG Dianji1,PAN Deng1,L IN Manqing1,DENG Tianci1,YANG Dandan1,HAN Ruiting1,YAO Jinrui2,HE Zhongguo2. Failure Characteristics and Laws of Acoustic Emission for Phosphorite Under Triaxial Loading[J]. Journal of Wuhan Institute of Chemical Technology, 2017, 39(6): 616-621 |
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| Authors: | TU Li1 ZHANG Dianji1 PAN Deng1 L IN Manqing1 DENG Tianci1 YANG Dandan1 HAN Ruiting1 YAO Jinrui2 HE Zhongguo2 |
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| Affiliation: | 1. School of Resource and Civil Engineering， Wuhan Institute of Technology，Wuhan 430074， China；2. Guizhou Kailin Co.， LTD，Guiyang 550000， China |
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| Abstract: | Failure characteristics of crack and laws of acoustic emission activity of phosphorite were investigated by the strain loading system and the acoustic emission testing system. The experimental results show that the process of acoustic emission for phosphorite under triaxial loading includes five stages， the fissure compaction， the elastic compression， the primary crack propagation， the dramatical crack propagation， and the macroscopic failure. Acoustic emission events hexisted at the maximum intensity and the macroscopic failure of phosphorite. The acoustic emission events decrease with the confining pressure of phosphorite increasing from 2 MPa to 4 MPa. |
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| Keywords: | phosphorite triaxial loading test acoustic emission crack failure characteristics |
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