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.
出处
《煤炭工程》
北大核心
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)
关键词
煤岩体
单轴压缩
声发射累计数
前兆信息
coal and rock mass
uniaxial compression
AE
forewarning message
