不同变质成因无烟煤孔隙特征及其对瓦斯突出的影响 .pdfVIP

学兔兔 2013年第5期 煤 炭 工 程 doi：10．1 1799／ce201305033 不同变质成因无烟煤孔隙特征及其 对瓦斯突出的影响 蔺亚兵 ，贾雪梅 ，马东民。 (1．陕西煤田地质局勘察研究院，陕西西安 710054； 2．西安科技大学化学与化工学院，陕西西安 710054； 3．西安科技大学地质与环境学院，陕西西安 710054) 摘 要：煤的孔隙特征是影响瓦斯突出的重要因素。文章对三种不同变质成因的无烟煤进行 了低温液氮吸附实验，分析了不同变质成因无烟煤的孔隙特征，提出了无烟煤低温液氮脱附回线 区别于烟煤的新的脱附回线类型。实验结果表明：无烟煤的孔隙主要以微孔为主，孔隙类型主要 为狭窄的缝形孔；深成变质作用无烟煤的孔隙结构要比区域岩浆热变质作用无烟煤的孔隙结构复 杂且易发生瓦斯突出。 关键词：无烟煤；孔隙特征；液氮吸附；脱附回线；瓦斯突出 中图分类号：TD713 ．1 文献标识码：A 文章编号：1671—0959(2013)05-0099-04 Crack Features of Different Metamorphogenic Anthracite and Affected to Gas Outburst LIN Ya—bing ．JIA Xue—mei ，MA Dong—min (1．Exploration Research Institute，Shaanxi Coalfield Geology Bureau，Xi an 710054，China； 2．School of Chemistry and chemical Engineering，Xi an University of Science and Technology，Xi an 71~54，China； 3．School of Geology and Environment，Xihn University of Science and Technology，Xi an 710054，China) Abstract：The crack features of coal were the important factors affected to the gas outburst．Low temperature liquid nitrogen adsorption experiments were conducted on three different metamorphogenic anthracites．The crack features of the different metamorphogenic anthracites were analyzed．The low temperature liquid nitrogen desorption loop of the anthracite would be distinguished by a new desorption loop of the anthracite．The experiment resuhs showed that the cracks of the anthracite were micro pores mainly and the crack type was a nalTow seam pore mainly．The crack structure of the deep metamorphism anthracite would more complicated than the crack structure and more easy