LIU G F, ZHANG Z, CAO Y X, et al.Experimental investigation on enhanced permeability of coal by CS2 with different volume fractions[J].Journal of Henan Polytechnic University(Natural Science) ,2022,41(5):8-16.

doi:10.16186/j.cnki.1673-9787.2020060063

Received:2020/06/21

Revised:2020/10/15

Published:2022/09/25

Experimental investigation on enhanced permeability of coal by CS₂ with 

different volume fractions

LIU Gaofeng1,2,3, ZHANG Zhen1,2, CAO Yunxing1,2,3, XIAN Baoan1,2,3, ZHANG Zhou1,2,3, GUO Fei1,2

1.Gas Geology Engineering Research Center，Henan Polytechnic University，Jiaozuo  454000，Henan，China;2.Henan International Joint Laboratory for Unconventional Energy Geology and Development，Jiaozuo  454000，Henan，China;3.Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region，Henan Province，Jiaozuo  454000，Henan，China

Abstract:In order to research the comprehensive effects of CS₂ on environmental protection，economy and permeability enhancement，the anthracite coal sample from Zhaogu Mine of Jiaozuo in Henan Province was selected to conduct the experiments by CS₂ with different volume fractions.The results indicated that the permeability of the modified coal samples had increased from 0.000 16～0.001 33 mD to 0.000 18～0.022 16 mD，and the ratio of the enhanced permeability rised from 37.31% to 1566~17%.Furthermore，the areal density of fractures was improved at the end surface and the enhanced permeability ratio of coal samples was promoted with the volume fraction of CS₂.A turning point exited on the permeability enhancement effect of coal sample at 50% volume fraction of CS₂.The permeability enhancement ratio increased with the volume fraction，but the growth was relatively small when the volume faction was less than 50%.On the contrary，the permeability enhancement ratio increased quickly with the volume fraction larger than 50%.In conclusion，the main reasons for the difference of the permeability enhancement effect were due to the material composition and chemical structure of the coal sample，in addition to different substances extracted from the coals by CS₂.

Key words:CS₂;volume fraction;coal;solvent extraction;enhanced permeability

 不同体积分数CS_2溶液对煤的增渗试验研究_刘高峰.pdf