煤矿安全2019，Vol.50Issue(7)：5-9,13,6.DOI:10.13347/j.cnki.mkaq.2019.07.002
煤体瓦斯运移的容阻效应分析
Capacitive Resistance Effect Analysis of Gas Migration in Coal
摘要
Abstract
Based on the theoretical analysis of gas adsorption and gas seepage in porous media, some new opinions on the law of gas migration in coal seam were proposed with experimental analysis. The results show that, for the gas in migration, coal structure has the storage-resistance effect, the dual functions of gas charging effect and gas hindering effect form the basic feature of coal matrix; adsorption reaction time, adsorption growth rate, adsorption equilibrium time and the maximum adsorption capacity are 4 key adsorption indexes between the coal samples; diffusion and seepage are two ways of gas migration in coal seam. When the gas pressure in the fractures or the large holes are higher than the gas pressure in the micro-nano-pore system, the gas migration velocity is dominated by gas seepage, otherwise, gas diffusion would be the main factor; the more developed the fracture, the more sensitive the coal body to the change of gas pressure drop, and the higher the gas desorption efficiency.关键词
瓦斯解吸/容阻效应/孔隙结构/双重介质/气体渗流Key words
gas desorption/capacitive resistance effect/pore structure/binary medium/gas seepage分类
矿业与冶金引用本文复制引用
刘永茜..煤体瓦斯运移的容阻效应分析[J].煤矿安全,2019,50(7):5-9,13,6.基金项目
国家重点研发计划资助项目(2018YFC0808001) （2018YFC0808001）
"十三五"国家科技重大专项资助项目(2016ZX05045002-006) （2016ZX05045002-006）
国家自然科学基金青年科学基金资助项目(51504137,51704164) （51504137,51704164）
