Split Set Anchor Rod (also known as Pipe-Seam Type Anchor Rod, Slit Wedge Tubing Bolt, or Rock Friction Stabilizer) is a revolutionary full-length anchoring support system designed for active reinforcement of surrounding rock masses. Unlike traditional point-anchor bolts, this innovative solution provides immediate and continuous support along the entire length of the borehole, making it an indispensable component in modern underground mining, tunneling, and geotechnical engineering projects .
Engineered from high-strength steel tubes with a longitudinal slit, the tube seam anchor rod delivers superior radial pressure and frictional resistance upon installation. This unique mechanism ensures that the surrounding rock remains in a state of triaxial stress, significantly enhancing stability even under dynamic loads such as blasting vibrations or significant rock displacement .
Working Principle
The effectiveness of the Tube Seam Anchor Rod lies in its simple yet powerful mechanical design. When installed into a borehole slightly smaller than the rod’s outer diameter, three critical forces are generated simultaneously:
Radial Pressure: The elastic recovery of the slitted tube exerts uniform radial pressure against the borehole walls along its entire length.
Frictional Resistance: The tight fit creates substantial friction, preventing any downward movement or sliding of the surrounding rock mass.
End Bearing Force: The anchor plate and托盘 (tray) provide additional承托力 (support force) at the surface, locking the system in place .
This combination ensures that the anchor rod maintains its supporting resistance even when the surrounding rock undergoes significant deformation. In fact, post-blast vibrations or rock shifts often lead to an increase in anchoring force over time, offering enhanced safety compared to expansion shell-type anchors .
Key Features & Advantages
Full-Length Anchorage: Provides continuous support from the collar to the tip of the borehole, eliminating weak points associated with end-anchored systems.
Immediate Load Bearing: Offers instant support upon installation, crucial for unstable ground conditions.
High Adaptability: Performs exceptionally well in fractured, soft, or highly stressed rock formations where other anchor types may fail.
Simple Installation: Requires no grouting or complex setting mechanisms. Installation is fast, reducing labor costs and improving tunneling efficiency by up to 60% .
Durability & Corrosion Resistance: Manufactured from high-grade materials such as Q235, 16Mn, or 20MnSi steel, ensuring long-term performance in harsh underground environments .
Cost-Effective: Low maintenance requirements and extended service life make it a economically viable choice for large-scale projects .
Post time: 2026-05-21 10:30:50
