关键词: 冻结孔布置, 优化设计, 调控目标, 冻掘配合

Abstract: Aiming at the difficult problems that the depth of alluvium in the West Ventilating Shaft of Zhaogu No.2 Coal Mine exceeds 700 m, little construction experience of similar vertical shaft in China and abroad, and the guiding principle of freezing design is not unified, through analysis and summary of the problems existing in the construction of frozen shaft in deep alluvium, and choose the guiding principle of freezing design to strengthen the freezing strength of the outer side of freezing wall in deep alluvium, which can fully reflect the safety, advancement and economy. The freezing scheme of the West Ventilating Shaft of Zhaogu No.2 Coal Mine was designed by using the method of arranging the main freezing holes outside and classifying the freezing holes according to their functions, combining with the comprehensive analysis method of freezing wall formation characteristics, and the target curve of temperature control of the shaft lining was put forward. Under the good construction conditions created by the combination of freezing and excavation, the average excavation speed of the outer wall of the alluvium section of the shaft reaches 87.1 m/month, which can be used for reference in the deep alluvium freezing shaft sinking project in China.