由于沉井施工技术具有施工安全、质量可靠、操作方便、施工工期短,经济效益显著等优点,最终确定为地下煤斗施工方案。介绍了煤斗沉井施工工艺流程及操作要点,如沉井制作、井筒加固措施、沉井下沉主要方法和措施、井内挖土和土方吊装方法,沉井封底主要方法和抗浮稳定性验算等。总结得出施工中一系列质量和安全控制措施。 As the caisson construction technology has the advantages of construction safety, reliable quality, convenient operation, short construction period and significant economic benefits, it is finally determined as a construction plan for underground coal pits. This paper introduces the construction process and key points of the construction of coal bucket sunk well, such as the production of caisson, the measures of wellbore reinforcement, the main methods and measures of caisson sinking, the methods of excavation and earthwork hoisting in well, the main method of back caisson backfloor and anti-floating stability checking . Concluded that a series of construction quality and safety control measures.