Open AccessComparative analysis of sealing effect of different hole sealing processes in coal mine
Author(s) -
Wei Xiong
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2005/1/012205
Subject(s) - expansive , seal (emblem) , cement , borehole , coal mining , coal , materials science , petroleum engineering , geotechnical engineering , mining engineering , geology , compressive strength , engineering , composite material , waste management , art , visual arts
In order to improve the concentration of gas extraction from boreholes in Liyazhuang Coal Mine, three different sealing technologies, namely bagged polyurethane sealing, self-expanding sealing device sealing and new expansion cement sealing, were tested in the field. It was found that the new expansion cement sealing was the best for boreholes. Further investigation into the meso-characteristics of the combination of the new type of expansive cement and coal wall shows that the new type of expansive cement for mining has a compact overall structure, strong articulated ability to the coal body, and can effectively seal the hole and fissure of the coal body with superior sealing performance.