Pipe seam anchors are high-strength steel tubular devices designed for efficient mine roof and wall support. Their unique construction includes:

• Longitudinal Seam: A continuous gap along the steel pipe enables elastic radial deformation.

• Tapered End: Facilitates smooth insertion into drill holes.

• End Plate Assembly: Applies pre-tensioning force via nut/washer systems to enhance stability.

Complete Support System Components:

1. Loading Plate: 150×150×6-10 mm square steel plate for load distribution.

2. Fastening Nut: Thread-matched to anchor ends for preload application.

3. Spherical Washer: Ensures uniform force transmission between plate and nut.

4. Anti-Loosening Device: Maintains tension in high-vibration environments.

Working Mechanism

Pipe seam anchors utilize a friction-based anchoring system:

1. Installation: Driven into a drill hole slightly smaller than its diameter.

2. Radial Expansion: Elastic contraction generates outward pressure against the hole wall.

3. Friction Lock: High surface friction stabilizes surrounding rock, preventing displacement.

 Installation Best Practices

Step-by-Step Guide

1. Drilling: Use rotary drills to create holes 2-4mm smaller than anchor diameter (e.g., 28mm hole for 30mm anchor).

2. Insertion: Drive anchor using hydraulic ram until plate contacts rock surface.

3. Tensioning: Tighten nut to 100-150 N·m torque (varies by rock class).

4. QC Check: Verify 5-10mm plate deflection under load for proper engagement.

Pro Tip: In highly fractured zones, combine with wire mesh for enhanced surface retention.