煤矿安全2017，Vol.48Issue(11)：49-52,4.DOI:10.13347/j.cnki.mkaq.2017.11.013
不同围压下煤层波速的实验分析
Experimental Analysis of Wave Velocity of Coal Seam Under Different Confining Pressure
摘要
Abstract
An ultrasonic wave experiment of six coal samples from 15# coal strata in Yangquan coal mining area was conducted under normal temperature and variable pressure condition in this paper,and the effect of confining pressure on coal seam wave velocity was analyzed.Results show that both of the P-wave and S-wave velocity of the samples increase with the confining pressure and have close second phase correlation with the pressure.The increased amplitude rate of coal samples with different fracture development degree is different with the increase of the confining pressure;there is a good linear positive correlation between P-wave and S-wave under different confining pressure conditions.By the data analysis from variable-azimuth ultrasonic testing,the coal seam has an obvious S-wave velocity anisotropy,and the direction of main fractures of this coal seam is determined.关键词
围压/煤样/超声波/各向异性/煤层波速Key words
confining pressure/coal sample/ultrasonic wave/anisotropy/wave velocity of coal seam分类
矿业与冶金引用本文复制引用
童继强,杨德义,李志军,任华育,王增玉..不同围压下煤层波速的实验分析[J].煤矿安全,2017,48(11):49-52,4.基金项目
国家自然科学基金资助项目(41374131) （41374131）
山西省煤基重点科技攻关资助项目(MQ2014-01) （MQ2014-01）
