煤矿安全2019，Vol.50Issue(7)：1-4,4.DOI:10.13347/j.cnki.mkaq.2019.07.001
低渗透突出煤破坏过程中瓦斯运移规律研究
Study on Gas Migration Law for Low Permeability Outburst Coal in the Process of Destruction
摘要
Abstract
Based on the experiment and numerical simulation, the paper analyzes and studies the gas migration law of low permeability coal seams during coal and gas outburst process by using self-developed coal and gas outburst simulation experiment device and the numerical model. The results show that, under the repeated action of the in-situ stress or moving abutment pressure, the permeability of the coal body in the low permeability coal seams increased, the absorption gas desorbed, the internal gas pressure increased, and the initial growth rate was faster, gradually became smaller, and finally became slower. At the same time, the free gas moves toward the mining space with low gas pressure. When a large amount of free gas can not be diffused and transported to the outside in time, the gas pressure inside the coal body continues to rise and accumulate to a certain extent. It will jointly with the in-situ stress effect to cause coal and gas outburst. Therefore, reducing free gas pressure is the key technology of low permeability outbust coal seam.关键词
低渗透性/突出煤层/瓦斯运移/数值模拟/解吸Key words
low permeability/outburst coal seam/gas migration/numerical simulation/desorption分类
矿业与冶金引用本文复制引用
李慧,魏建平,王雪龙..低渗透突出煤破坏过程中瓦斯运移规律研究[J].煤矿安全,2019,50(7):1-4,4.基金项目
国家自然科学基金资助项目(51604184,51604186) （51604184,51604186）
山西省自然科学基金青年基金资助项目(2016021090) （2016021090）
