煤田地质与勘探2016，Vol.44Issue(4)：40-45,6.DOI:10.3969/j.issn.1001-1986.2016.04.008
煤体结构对煤层气吸附-解吸及产出特征的影响
The influence of coal body structure on adsorption-desorption and releasing char-acteristics of coalbed methane
摘要
Abstract
The differences of pore and physical-chemical structure of coal body have great effect on adsorp-tion-desorption and releasing characteristics of coalbed methane. Based on understanding of pores, structures and mechanical properties of different coal body structures, the paper analysed coal body structure influencing the releas-ing of coalbed methane with field measured data. Results show that tectonism makes pore volume and specific surface area of coal body increase, and adsorption capacity enhanced. Gas content and lost gas present positive correlation;relations of rate of lost gas of different coal body structures were: primitive texture coal < reptured coal < fragmented coal<mylonitic coal with the same gas content. Critical desorption pressures of primitive texture coal and reptured coal are more than mylonitic coal’s. In 0~45 min、45~95 min、95~185 min, relations of average desorption rate of different coal body structures were: primitive texture coal<reptured coal<mylonitic coal; in 185~485min, their rela-tions change, showing mylonitic coal<primitive texture coal<reptured coal. Desorption quantity and desorption time of primitive texture coal and reptured coal are obviously hingher than mylonitic coal’s on condition of almost the same gas content.关键词
吸附-解吸/产出特征/赋存状态/临界解吸压力/煤体结构Key words
adsorption-desorption/releasing characteristics/occurrence/critical desorption pressures/coal body structure分类
天文与地球科学引用本文复制引用
张小东,李朋朋,衡帅,孙庆宇,胡修凤..煤体结构对煤层气吸附-解吸及产出特征的影响[J].煤田地质与勘探,2016,44(4):40-45,6.基金项目
国家自然科学基金项目(41372162)；河南省高校科技创新团队支持计划(14IRTSTHN002)@@@@National Natural Science Foundation of China(41372162)；Innovative Research Team (in Science and Technology) in University of Henan Province(14IRTSTHN002) （41372162）
