Slotted Pipe Rock Bolt (Split Set Anchor)
Slotted Pipe Rock Bolt, also widely known as Split Set Stabilizer or Friction Rock Bolt, is a high-performance, full‑length friction anchoring system designed for ground support in mining, tunneling, slope stabilization and underground engineering. It delivers immediate, reliable rock reinforcement without grouting or curing, making it one of the most cost‑effective and widely used anchoring solutions globally.
Working Principle
The slotted pipe rock bolt consists of a high‑strength longitudinally slotted steel tube with a tapered leading end for easy insertion and a welded flange at the outer end to fix the bearing plate. When driven into a drill hole slightly smaller than its outer diameter, the elastic steel tube compresses radially and exerts continuous, uniform pressure along the full contact length with the borehole wall. Combined with the bearing plate, it places the surrounding rock mass in a three‑dimensional stress state, greatly enhancing stability and self‑supporting capacity.
Key Features & Advantages
- Immediate Support: Full‑length friction anchorage provides instant load capacity upon installation, no waiting time.
- Simple Structure: Only two main parts – slotted tube and bearing plate – for easy handling and low failure rate.
- Fast Installation: Driven directly with standard percussion drills; no grouting, resin or torque required.
- Strong Adaptability: Performs well in hard rock, fractured zones, soft strata and complex geological conditions.
- High Anchoring Performance: Radial elastic force increases with rock deformation for enhanced long‑term stability.
- Corrosion Resistance: Available in black, electro‑galvanized and hot‑dip galvanized finishes for extended service life.
- Cost Effective: Lower material and labor cost, shorter construction time and reduced downtime.
Technical Specifications (Customizable)
- Material: Q235B, Q355B, high‑strength steel strip
- Outer Diameter: 33mm, 39mm, 42mm, 44mm, 47mm (customizable)
- Length: 1.2m – 2.5m (customizable)
- Wall Thickness: 2.5mm – 3.5mm
- Slot Width: 10mm – 15mm
- Surface Treatment: Black / Electro-galvanized / Hot-dip galvanized
- Accessories: Domed bearing plate, driving tool, pull collar
Typical Applications
- Underground mining: roadway roof & sidewall support
- Tunneling: initial and permanent rock stabilization
- Slope engineering: slope reinforcement and anti‑sliding protection
- Hydropower projects: cavern and foundation pit support
- Construction: foundation, retaining wall and fractured rock reinforcement
Post time: 2026-03-10 15:25:40
