Field Experiment Research of the Polycystic Aeration Bolt: Model Design and Anchorage Mechanism

Table 2

The specific parameters of bolt materials.

Material	Type parameter	Product
Steel tube	External diameter: φ54 mm; thickness: 5 mm; length: 6 m
Airbag rubber	Butyl rubber; inner diameter: φ56 mm; thickness: 4 mm
Stainless steel throat band	Width: 10 mm; maximum diameter: 74 mm
Control device	Pressure gauge: 0–2.5 MPa; stainless steel water valve; stainless steel interior plug tee; stainless steel tube with double outer wire