摘要
为研究水对煤样声发射特征影响，对不同含水率煤样进行了的声发射特征试验。结果表明：煤样单轴抗压强度随含水率增加并无线性降低关系；水的存在改善了加载初期煤样的应力集中，减少了煤样破坏全过程内部裂纹破坏次数和破坏强度；较大声发射信号均在显著应力降低发生时同步产生；声发射信号发生跳跃前信号水平比较低，反映了内部能量积累的一个过程。
In order to study the influence of water on acoustic emission characteristics of coal,the unaxial compression AE （acoustic emission） tests under different moisture content coal are conducted.The results show that unaxial compressive strength of coal has no linear relation with the increase of the moisture content.Water weakens the stress concentration of coal in the inital process of loading,and it reduces the number and intensity of coal＇s internal failure in the whole process of loading. Moreover,the higher AE signal appears at the time of apparent stress drop. AE signal keeps in a low level before jumping,which reflects a process of energy accumulation.
出处
《煤矿安全》
CAS
北大核心
2016年第2期25-28,共4页
Safety in Coal Mines
基金
江苏省大学生创新创业训练计划资助项目（201410290001Y）
2015年大学生创新创业基金资助项目（201504）
关键词
含水率
单轴压缩
应力应变
声发射特征
保护煤柱设计
miosture content
uniaxial compression
stress and strain
acoustic emission characteristic
coal pillar design
