Study on the Formation Law of the Freezing Temperature Field of Freezing Shaft Sinking under the Action of Large-Flow-Rate Groundwater

Table 4

Freezing parameters of wind well in Zhangji Mine.

Parameters		Value	Unit
Inner diameter of the wellbore		7	m
Diameter of the excavation boundary		9	m
Auxiliary freezing pipe	Diameter of the arrangement area	13	m
	Quantity	18	1
	Spacing	2.27	m
	Temperature	−32	°C
	Size of freezing pipe	159 × 6	mm
Main freezing pipe	Diameter of the arrangement area	17	m
	Quantity	42	1
	Spacing	1.27	m
	Temperature	−32	°C
	Size of freezing pipe	159 × 6	mm
Row spacing		2	m