Research on numerical simulation of freezing temperature field in uncovering outburst coal seam in cross-cut
Abstract：Aiming at a new-presented outburst-proof method by injecting liquid and freezing in uncovering coal seam in cross-cut in this paper,with the ANSYS numerical simulation software,according to the operation parameters in the work face of uncovering coal seam at No.2 cross-cut of-400 m level in Longjiashan Mine,the authors established the numerical simulation calculation model of the temperature field in freezing section,analyzed its expand nephogram in different period,decided the effective range,average temperature,closure time of ice zone and expand velocity.The simulation shows that the more near to the freezing center,the more fast the temperature of the No.6 coal seam will decline.At the same time,the temperature in coal seam of frozen tubes in center cross-section and vertical-section is lowest.After 35~40 days,reached the frozen control temperature of-15 ℃ for outburst-proof.The No.6 coal in freezing zone is strong enough to prevent coal and gas outburst.The feasibility of injecting liquid and freezing as a new outburst-proof method was proved.
Keywords：uncovering coal seam in cross-cutcoal and gas outburstinjecting liquid and freezingfreezing areanumerical simulation
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)