In the demanding environments of underground mining and tunneling, rock reinforcement is critical to ensure structural stability and worker safety. SupAnchor, a leading Chinese manufacturer of self-drilling anchor systems, has unveiled its SupHulk friction rock bolt series, designed to provide immediate load-bearing capacity through advanced friction anchoring technology. The SupHulk system offers a robust solution for geotechnical reinforcement, particularly in low to medium stress conditions where ground movement must be controlled rapidly.
The SupHulk Premium (PM) series includes three models—PM12, PM16, and PM24—each tailored to specific load requirements. The PM12 delivers a minimum breaking load of 110 kN and a yield load of 100 kN, while the PM16 and PM24 offer 160 kN and 240 kN breaking loads, respectively, with yield loads of 130 kN and 200 kN. All models feature a minimum elongation of 10% (A100mm), ensuring ductility under stress. The inflation water pressure is 300 bar for PM12 and PM24, and 240 bar for PM16, allowing the bolt to expand and conform to borehole irregularities.
Installation is straightforward: the operator drills a hole, inserts the bolt, and inflates it to a predetermined pressure using a specially designed pump that automatically stops at the recommended level, ensuring consistent quality. The SupHulk rock bolt can be subjected to pull tests at any time to verify performance, a key advantage for quality assurance in critical applications.
Weight varies with length, as shown in the table below:
| Length (m) | PM12 Weight (kg) | PM16 Weight (kg) | PM24 Weight (kg) |
|---|---|---|---|
| 1.2 | 2.50 | - | - |
| 1.5 | 3.10 | - | - |
| 1.8 | 3.70 | 5.10 | 7.20 |
| 2.1 | 4.30 | 5.80 | 8.40 |
| 2.4 | 4.90 | 6.70 | 9.50 |
| 3.0 | 6.00 | 8.20 | 10.60 |
| 3.3 | 6.60 | 8.90 | 12.90 |
| 3.6 | 7.20 | 9.70 | 14.00 |
| 4.0 | 8.00 | 10.70 | 15.60 |
| 4.5 | 9.00 | 12.00 | 17.40 |
| 5.0 | 9.90 | 13.30 | 19.30 |
| 6.0 | 11.90 | 15.90 | 23.10 |
In mining operations, SupHulk rock bolts are widely used for roof bolting and hanging wall bolting, providing rapid support that immediately absorbs rock movements. The friction anchoring mechanism distributes load along the entire bolt length, making it effective in varying rock qualities. For tunneling, the bolts serve as pattern bolts for radial systematic anchoring, helping to stabilize excavations of all sizes. The PM series is particularly suited for low to medium stress environments where stiff reinforcement with high yield load is required.
The system's ability to bridge gaps in rock and allow significant shear movements without failure makes it a reliable choice in both hard and soft rock formations. A 50 cm long inflated bolt can generate up to 100 kN of friction, ensuring secure anchoring even in challenging geologies.
As global infrastructure projects expand and existing mines go deeper, the demand for efficient geotechnical reinforcement systems grows. SupAnchor's SupHulk friction rock bolts offer a cost-effective and time-saving alternative to traditional drill-and-grout bolts, eliminating the need for resin or cement grouting. The self-drilling anchor bolt design integrates drilling and anchoring, streamlining installation and reducing labor. This innovation aligns with the industry's push for safer, faster, and more reliable ground support solutions.
SupAnchor has established itself as a reputable ground anchor bolt factory and self-drilling anchor system manufacturer, with ISO certifications and a track record of supply to projects worldwide. The company's commitment to R&D and quality control ensures that products like the SupHulk meet the rigorous demands of modern construction and mining. By combining professional engineering with innovative design, SupAnchor continues to support the global community of geotechnical engineers and contractors.
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