| 压剪破坏条件下型煤的声发射特征研究 |
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| 引用本文： | 李西蒙,黄炳香,刘长友,王晓,刘锋.压剪破坏条件下型煤的声发射特征研究[J].湖南科技大学学报(自然科学版),2010,25(1). |
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| 作者姓名： | 李西蒙 黄炳香 刘长友 王晓 刘锋 |
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| 作者单位： | 中国矿业大学,矿业工程学院,江苏,徐州221116;中国矿业大学,煤炭资源与安全开采国家重点实验室,江苏徐州221116 |
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| 基金项目： | 国家重点基础研究发展计划，国家自然科学基金资助项目 |
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| 摘 要： | 为了给煤炭开采活动中煤岩体和巷道压剪破坏的预报预测提供一定的依据,采用微机控制试验机进行了型煤试块的压剪破坏试验,研究了压剪破坏条件下的声发射特征及压剪应力状态的影响.试验结果表明:声发射伴随于整个型煤压剪破坏的始终,压密阶段之后,声发射事件随应力的增减而增减;当压应力等于剪应力时,声发射事件与试样应力曲线变化趋势最为接近;随着型煤试样剪切破坏强度的下降,声发射事件的峰值也呈现逐渐减小的趋势;低剪切角条件下声发射事件高于高剪切角条件下声发射事件.
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| 关 键 词： | 型煤 声发射 压剪破坏 剪切角 |
Study on acoustic emission characteristics of mould coal under compression-shear conditions |
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| LI Xi-meng,HUANG Bing-xiang,LIU Chang-you,WANG Xiao,LIU Feng.Study on acoustic emission characteristics of mould coal under compression-shear conditions[J].Journal of Hunan University of Science & Technology(Natural Science Editon),2010,25(1). |
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| Authors: | LI Xi-meng HUANG Bing-xiang LIU Chang-you WANG Xiao LIU Feng |
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| Institution: | LI Xi-meng1,2,HUANG Bing-xiang1,LIU Chang-you1,WANG Xiao1,LIU Feng1,2 (1.School of Mines,China University of Mining & Technology,Xuzhou 221116,China,2. State Key Laboratory of Coal Resources , Safe Mining,China) |
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| Abstract: | The chief purpose of this paper aims at studying the AE (acoustic emission)characteristics and influence of compression-shear stress state under the condition of compression-shear failure in order to provide the certain evidence for the forecast of the coal and rock mass and the compression-shear failure in the roadways during the coal mining activity.The compression-shear experiments of the mould coal sample were done by using the microcomputer-controlled testing machine.The experiment results showed that ... |
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| Keywords: | mould coal acoustic emission compression and shear failure shear angle |
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