Investigation on the precursors of bump-prone coal failure

摘要：

The acoustic and thermal infrared (TIR) characteristics of bump prone coal during different loading tests are described. The experimental system is composed of the TIR observation system, the stress and strain measurement system and the acoustic emission monitoring system. The system can be used to achieve different kinds of precursors before the failure of rock or coal samples. The uniaxial compression loading test and the cyclic loading test are carried out to observe the features of TIR, acoustic emission, and strain variation. The response speed and the sensitivity of different monitoring units to the cracking events in the samples are also studied and the physical and mechanical characteristics of bump prone coal are obtained. The analytical results show that the stress of ninety percent of strength should be regarded as the stress-caution-zone for the failure of bump prone coal, which is much higher than the stress of seventy percent of strength as the stress-caution-zone for the general coal samples.

关键词： bump prone coal thermal infrared acoustic emission coal bump uniazial compression

作者: Zhao Yi-xin Jlang Yao-dong Zhu Jie Wu Zhi-ping Zhao Wen-fei

作者单位: State Key Laboratory of Coal Resources and safe mining, China University of Mining and Technology, B School of Mechanics, Architecture and Civil Engineering, China University of Mining and Technology,

会议类型: 国际会议

会议名称: The 6th International Conference on Mining Science & Technology ICMST 2009(第六届国际矿业科学技术大会)

会议地点: 徐州

会议语种:英文

页码: 1-5

在线出版日期: 2009-10-18（万方平台首次上网日期，不代表论文的发表时间）