煤矿安全2017，Vol.48Issue(9)：77-80,4.DOI:10.13347/j.cnki.mkaq.2017.09.021
高瓦斯煤层群首采层“Y"型通风瓦斯抽采技术
Gas Extraction Technology for "Y" Ventilation in the First Layer of High Gas Coal Seam
摘要
Abstract
Numerical simulation and on-site test were combined to research the coal mining technology of Y-type ventilation with thick and soft coal seam systematically for the problems of deep buried coal seam group,soft coal quality,high gas pressure and gas content in the coal seam of the eastern part of China.Evolution characteristics of surrounding rock cracks in thick coal seam mining and the vertical displacement and subsidence were obtained in this paper.The research result showed that the bedseparated fissures and lengthways fissures of overburden rock stratum in the location of 10 times mining level were most developed.Gas enrichment zone and crack network which can provide a passage for gas drainage were formed here.The method of gas drainage in large diameter drilling group was designed,and the pressure-released gas in roof fractured zone and the gas in gob were effectively controlled by large diameter borehole and pipe-buried technology.Finally,the gas concentration in the air was controlled below 0.3％,and efficient gas drainage was realized by the method that high dip high drainage roadway gas was replaced by large diameter borehole.关键词
煤层群/“Y”型通风/钻孔组/大直径钻孔/瓦斯抽采Key words
coal seam group/Y-shape ventilation/drilling group/large diameter borehole/gas drainage分类
矿业与冶金引用本文复制引用
李朝,翟艳鹏..高瓦斯煤层群首采层“Y"型通风瓦斯抽采技术[J].煤矿安全,2017,48(9):77-80,4.基金项目
国家自然科学基金资助项目(51304006) （51304006）
