辽宁工程技术大学学报（自然科学版）2017，Vol.36Issue(12)：1251-1256,6.DOI:10.11956/j.issn.1008-0562.2017.12.004
不同冲击倾向性煤体变形破坏声发射特征
Deformation rules and acoustic emission characteristics of coal with different outburst proneness
摘要
Abstract
In order to understand more deeply the acoustic emission characteristics of deformation and destruction of coal with different outburst proneness,this paper tested three typical coal and rock specimens with strong,weak and none outburst proneness under uniaxial compression condition of acoustic emission.The test results show that the acoustic emission activity of coal with outburst proneness has obvious periodicity,and closely associated with the change of the stress;acoustic emission of coal with no outburst proneness is active during the whole deformation and destruction process with no obvious periodicity;coal with different impact tendency always has a large amount of high-energy at the stage of near the rupture instability,and acoustic emission signal energy differs by one order of magnitude,The ratio of the energy release rate before the energy peak to the energy release rate after the energy peak is defined as Ev.Ev can well show the different outburst proneness characteristics of deformation and failure process of energy release,which can be used as a new indicator to evaluate the outburst proneness of coal seam.关键词
煤体/冲击倾向性/声发射/单轴压缩/能量Key words
coal mass/outburst proneness/acoustic emission/uniaxial compression/energy分类
矿业与冶金引用本文复制引用
李宏艳,孙中学,齐庆新,李凤明,赵善坤..不同冲击倾向性煤体变形破坏声发射特征[J].辽宁工程技术大学学报（自然科学版）,2017,36(12):1251-1256,6.基金项目
国家自然科学基金面上项目(51174112) （51174112）
