In underground mining, tunneling and slope stabilization, rock bolt selection directly determines construction safety, speed and project cost. The three most widely used support solutions are Post-Tensioned Rock Bolt, Split Set Bolt and Hollow Bar Bolt. Here is a concise comparison for fast project selection.
1. Split Set Bolt (Friction Bolt)
◎ Features: Passive friction anchoring, no grouting required, fast & easy installation
◎ Application: Mine roadway temporary support, shallow tunnel, general fractured rock
◎ Cost: Lowest cost, best budget-friendly option for short-term support
2. Hollow Bar Bolt (Self-Drilling Bolt)
◎ Features: Integrate drilling, grouting and anchoring; solves hole collapse problems
◎ Application: Broken loose strata, advance support, slope grouting reinforcement
◎ Cost: Medium cost, excellent performance in complex unstable ground
3. Post-Tensioned Rock Bolt (Prestressed Thread Bar)
◎ Features: Active prestress support, high tensile strength, anti-corrosion, long service life
◎ Application: Deep foundation pit, high steep slope, long-span tunnel, permanent anchoring
◎ Cost: Higher unit cost for it is soild and unit weight is high then split set bolt and Hollow Bar, but lowest long-term maintenance cost for permanent projects
Quick Selection Guide
◎ Temporary support & cost priority → Split Set Bolt
◎ Complex broken strata & grouting reinforcement → Hollow Bar Bolt
◎ Permanent project, high stress & high safety standard → Post-Tensioned Rock Bolt
We supply full-series rock bolts with stable quality, fast delivery and customized specifications for global geotechnical & mining projects.
Any requirement,please do not hesitate to contact YIDAO METAL.
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