单轴压缩条件下煤岩体声发射特性研究  

Study on Acoustic Emission Characteristics of Coal and Rock Mass Under Uniaxial Compression

作　　者：曾宪涛[1] 姜耀东[1,2] 王宏伟[1] 严硕[1] 

机构地区：[1]中国矿业大学(北京)力学与建筑工程学院学院,北京100083 [2]中国矿业大学(北京)煤炭资源与安全开采国家重点实验室,北京100083

出　　处：《煤炭工程》2015年第2期75-77,81,共4页Coal Engineering

基　　金：国家重点基础研究发展计划(973计划)资助项目(2010CB226801);中央高校基本科研业务费专项资金项目(2014QL01)

摘　　要：随着煤炭开采深度的增加,煤岩赋存环境更加复杂,动力灾害显现严重,为研究煤岩动力失稳灾害机理,进而达到对灾害的有效预警的目的,通过对煤岩体单轴加载条件下变形和声发射同步观测试验,获取煤样变形破坏过程中应力、应变和声发射信息,揭示了煤岩体变形破坏过程中的声发射参数变化特征;并将声发射振铃计数和声发射能量分别进行累加,在对比不同通道的累计数变化规律的基础上,总结分析了煤岩体破坏前兆的累计数特征。To study the mechanism of coal and rock mass dynamic disaster and realize precise pre - warning, simultaneous observation test of uniaxial compression and acoustic emission （ AE ） was done, stress, strain and AE parameters were obtained, the characteristics of AE parameters was analyzed. The variation feature of AE parameters during the deformation of coal and rock mass was revealed. The counts of AE and AE energy were accumulated respectively, data collected by different AE sensors were compared, and the characteristics of forewarning messages before destruction was summarized.

关 键 词：煤岩体 单轴压缩 声发射累计数 前兆信息 

分 类 号：TD315[矿业工程—矿井建设]