含瓦斯煤体弹性波传播规律研究  

Research on Propagation Law of Wave in Coal Seam Containing Gas

作　　者：徐刚[1] 邓绪彪[1] 张凯[1] 刘万金[1] 

机构地区：[1]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：《煤矿安全》2009年第6期1-4,共4页Safety in Coal Mines

摘　　要：以Biot的饱和流体多孔隙介质弹性波传播理论为基础,考虑到游离态瓦斯和吸附态瓦斯对煤体的力学变形特性存在较大差异,将含瓦斯煤体分为无吸附相模型和吸附相模型,并对含瓦斯煤体的弹性波传播规律进行了研究。研究结果表明:无吸附相模型的弹性波速度随着瓦斯压力的增加略有下降,与单相介质煤相比相差不大;吸附相模型的弹性波速度随着瓦斯压力的增加下降趋势明显,表现出明显的双相介质特征。Based on theory of saturation liquid hole medium propagation law of wave of Biot, considering there is rather difference in mechanics distortion trait with coal by free gas and adsorbed gas, coal containing gas can be divided into non adsorbed model and adsorbed model, and propagation law of wave was analyzed in coal containing gas. The results show with the gas pressure increasing, the wave velocity of non adsorbed model compared with coal＇s is slightly descend, the wave velocity of adsorbed model is badly descend, expressed evident character of two - phrase medium.

关 键 词：含瓦斯煤 弹性波 双相介质 传播规律 

分 类 号：TD713[矿业工程—矿井通风与安全]