Expandable Rock Bolt

A unique rock anchoring device is formed by folding a welded tubular material inward and sealing it at one end. The product is mainly applied in various tunnel and mining systems.

Typical anchoring components in tunnel construction It has the ability to withstand high deformation loads
Expandable rock bolt can be used as grid anchor bolts to support tunnel excavation work

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Model	Diameter	Yield strength	Tensile strength	Breaking force	Elongation	Thickness	Diameter of circular pipe	Expansion pressure	Length
Pm12	28mm	≥380MPa	≥450MPa	≥120KN	≥10%	2mm	41mm	300Bar	900~2400mm
Pm16	36.5mm	≥380MPa	≥450MPa	≥160KN	≥10%	2mm	54mm	240Bar	900~2400mm
Pm24	37mm	≥380MPa	≥450MPa	≥240KN	≥10%	3mm	54mm	300Bar	900~2400mm
Mn12	28mm	≥380MPa	≥450MPa	≥110KN	≥20%	2mm	41mm	300Bar	900~2400mm
Mn16	36mm	≥380MPa	≥450MPa	≥150KN	≥20%	2mm	54mm	240Bar	900~2400mm
Mn24	37mm	≥380MPa	≥450MPa	≥220KN	≥20%	3mm	54mm	300Bar	900~2400mm