不同变质程度煤体破碎度对瓦斯放散初速度的影响  

Fragmentation of Different Metamorphic Degree Coal Affected to Initial Velocity of Gas Emission

作　　者：贾东旭[1,2] 孙景来[1,2] 

机构地区：[1]煤炭科学研究总院矿山安全技术研究分院,北京100013 [2]煤炭资源高效开采与洁净利用国家重点实验室,北京100013

出　　处：《煤炭科学技术》2013年第8期68-70,共3页Coal Science and Technology

基　　金：国家科技重大专项资助项目(2011ZX05040-001;2011ZX05063-009);国家重点基础研究发展计划(973计划)资助项目(2011CB201206)

摘　　要：为分析煤矿开采中煤体破碎度对瓦斯放散初速度的影响,以便从该角度研究煤与瓦斯突出的难易程度,研究了不同变质程度煤样粒径的改变对其瓦斯放散初速度的影响。结果表明,煤样的瓦斯放散初速度随粒径的增大呈幂函数关系减少,即煤体的破碎度越大,瓦斯放散初速度越大,同时这种增大的趋势随粒径的增大而变得越来越小;且煤样的变质程度越高,煤样粒径对瓦斯放散初速度影响就越大;普氏系数小的煤样瓦斯放散初速度受煤样粒径改变的影响较大。In order to find out the fragmentation of coal in the miming process affected to the initial velocity of gas emission, from the view of the study on the difficulty degree of the coal and gas outburst,the paper had a study on the particle size variation of the different metamorphic degree coal sample affected to the initial velocity of gas emission.The results showed that the initial velocity of the emission from the coal sample would be decreased in a power function with the particle size increased.The higher fragmentation of the coal was ,the higher initial velocity of gas emission would be and the increasing tendency would be getting lower with the particle size increased.The higher met- amorphic degree of the coal sample, the particle size of the coal sample would have a higher influence to the initial velocity of the gas emission.As for the coal sample with low Protodyakonov coefficient,the initial velocity of gas emission would be highly affected by the particle size variation of the coal sample.

关 键 词：煤体破碎度 瓦斯放散初速度 粒径 变质程度 普氏系数 

分 类 号：TD712[矿业工程—矿井通风与安全]