Abstract:

With the coal mine in the west of the Inner Mongolia and the east of the Gansu province, the artificial freezing method is used widely in the construction of shaft passing through the watery strata. As the main components of the artificial freezing, the quality and schedule of freezing drilling directly affects the closure time of two ice poles. Combined with the experience of the artificial freezing engineering in this area, the Bo jiang hai auxiliary shaft ,which net diameter is the greatest, and the He tao yu auxiliary shaft ,which freezing depth is the greatest ,are taken as the typical formation to research so as to approach the technology points of hole straightening ,taking the coal core ,passing through the conglomerate. as provides reference for freezing drilling in the area

Key words: the area of the west of the Inner Mongolia and the east of the Gansu province, freezing drilling, hole straightening, taking the coal core, passing through the conglomerate