构造煤的瓦斯放散特征及孔隙结构微观解释  

Gas emission characteristics of tectonic coal and microscopic explanation of pore structure

作　　者：张慧杰 张浪[1,2] 汪东 侯金玲[1,2] ZHANG Huijie;ZHANG Lang;WANG Dong;HOU Jinling(Mine Safety Technology Branch,China Coal Research Institute,Beijing100013,China;State Key Laboratory of Coal Mining and Clean Utilization (China Coal Research Institute),Beijing 100013,China)

机构地区：[1]煤炭科学技术研究院有限公司安全分院,北京100013 [2]煤炭科学研究总院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：《煤炭学报》2018年第12期3404-3410,共7页Journal of China Coal Society

基　　金：国家重点研发计划资助项目(2017YFC0804207);国家自然科学基金资助项目(51504137);煤炭科学技术研究院科技发展基金资助项目(2016JC11)

摘　　要：采用恒温煤粒瓦斯放散试验方法,研究了构造煤和原生煤瓦斯放散过程的差异性,结果表明构造煤在瓦斯放散初始1 min的瓦斯解吸量是原生煤的2. 15～4. 06倍,构造煤趋近极限瓦斯解吸量所需时间不足原生煤所需时间的25%,原生煤的极限瓦斯解吸量略高于构造煤,构造煤与原生煤对典型瓦斯放散数学表达式的适用性存在很大不同。为解释试验结果,采用压汞法和低温氮吸附法对煤的孔隙结构进行测试,分析得到中孔及大孔分布是导致构造煤和原生煤瓦斯放散特征差异的主要因素,大分子结构等其他因素对瓦斯放散特征的影响有待于进一步研究。The gas emission experiments of coal particles at a constant temperature were conducted to study the difference of gas emission between tectonic coal and original coal.Results show that the amount of gas emission of tectonic coal in the first one minute is 2.15-4.06 times of original coal.The time required to reach the full amount of gas emission by tectonic coal is 25%less than that of original coal,and the full emission amount of original coal is slightly higher than that of tectonic coal.The mathematical expressions which can represent the gas emission of tectonic coal and original coal are different.To explain the experiment results,the pore structures of coal were tested by the mercury intrusion and the low temperature nitrogen adsorption methods.Analysis shows that the distribution of mesopore and macropore is the main factor inducing the difference of the gas emission characteristics between tectonic coal and original coal.Other influencing factors need to be investigated such as macromolecular structure.

关 键 词：构造煤 瓦斯放散特征 孔隙结构 煤与瓦斯突出 压汞法 低温氮吸附 

分 类 号：TD712[矿业工程—矿井通风与安全]