摘要
针对新提出的石门揭煤注液冻结防突方法,根据龙家山煤矿-400 m水平2号石门揭煤工作面施工参数,应用ANSYS数值模拟软件,建立了石门揭煤冻结温度场数值模拟计算模型,分析了不同时期冻结区温度扩展云图,得出不同冻结时间冻结区有效范围、平均温度、交圈时间及温度扩展速度。数值模拟表明:距离中心越近,冻结区煤层温度下降越快;相同冻结时间,竖向中排冻结管断面和横向中排冻结管断面处煤层温度最低。该石门揭煤工作面需要35～40 d冻结时间来满足-15℃煤层控制温度的防突工程要求。证明石门揭煤注液冻结防突技术是可行性的。
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.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2011年第9期1511-1514,共4页
Journal of China Coal Society
基金
国家自然科学基金资助项目(50674047)
湖南省教育厅资助项目(10C0574)
贵州大学引进人才科研基金资助项目[贵大人基合字(2010)002号]
关键词
石门揭煤
煤与瓦斯突出
注液冻结
冻结区
数值模拟
uncovering coal seam in cross-cut
coal and gas outburst
injecting liquid and freezing
freezing area
numerical simulation
