Abstract: The application of the long hole open stope filling later method of high phase in the Lilou iron ore is introducted.At the same time ,the stability of mining process of the large underground stope is researched at length.Accroding to the research findings,the width and height of the stope structure are unchanged.The ore room or pillar is divided into 2~3 sections,and they are recoveried respectively so as to achieve the desired effect and obtain good economic benefits.

Key words: Large and thick orebody, Exposed area, Long hole open stope filling later method of high phase, Stoping sections