煤结构异性对瓦斯渗透特性影响的实验研究  

Experimental Study on Influence of Structural Anisotropy of Coal upon Gas Permeability

作　　者：黄学满[1,2,3] 

机构地区：[1]瓦斯灾害监控与应急技术国家重点实验室,重庆400037 [2]中煤科工集团重庆研究院,重庆400039 [3]山西渝煤科安运风机有限公司,山西运城044000

出　　处：《矿业安全与环保》2012年第2期1-3,90,共3页Mining Safety & Environmental Protection

基　　金：国家科技重大专项(2011ZX05040-003-003-003)

摘　　要：利用煤岩渗透测试系统,对煤样试件平行层理和垂直层理方向上,进行了不同瓦斯压力下的渗透率测定,结果表明:煤的结构异性对瓦斯渗透特性影响较大,实验煤样在两个方向上的渗透率大小相差约为1个数量级。针对瓦斯在平行煤样层理方向和垂直层理方向上流动特性的差异,建立了煤样瓦斯渗流的串联和并联阻流模型,并就层理构造对瓦斯渗透特性的影响进行了理论分析。The gas permeability parallel and vertical to the bedding of raw coal specimens under different gas pressures was measured by using coal and rock permeability testing system,the results showed that the structural anisotropy of coal had greater influence upon the gas permeability of coal,and the difference of gas permeability of the experimental coal specimens in two directions was one order of the magnitude.The serial and parallel flow-choking model of gas seepage of coal specimens was set up according to the difference of gas flow characteristics parallel and vertical to the bedding of coal specimens,and theoretical analysis was also made on the influence of bedding structure upon the gas permeability.

关 键 词：煤体 瓦斯 渗流 结构异性 

分 类 号：TD712[矿业工程—矿井通风与安全]