Mining Roof Bolts
Advantage:
Mining Support Bolts are essential for stabilizing underground structures, ensuring worker safety, and improving operational efficiency. Among them, Coal Mine Roof Bolts provide critical reinforcement against roof collapses, offering superior load-bearing capacity in challenging coal seams. Meanwhile, Tunnel Support Bolts are widely used in civil engineering and mining to prevent rockfalls and maintain tunnel integrity. These high-strength bolts are designed for durability, corrosion resistance, and easy installation, making them ideal for harsh mining conditions. By using advanced materials and engineering, Mining Support Bolts deliver unmatched reliability, reducing maintenance costs and enhancing long-term structural stability in coal mines and tunneling projects. Choose premium-quality bolts for optimal safety and performance.
Product Details:
Premium Mining Roof Bolts & High Strength Rebar for Reliable Tunnel Support
When it comes to ensuring structural stability in mining and tunneling, Mining Roof Bolts play a critical role in preventing collapses and reinforcing underground excavations. These bolts, often made from High Strength Rebar, provide exceptional tensile strength and load-bearing capacity, making them ideal for demanding environments like coal mines and deep tunnels.
Our Tunnel Support Bolts are engineered for maximum durability, featuring corrosion-resistant coatings and superior anchoring performance. Whether used in soft rock or high-pressure conditions, they ensure long-lasting reinforcement, reducing maintenance costs and improving safety.
Key benefits of our High Strength Rebar anchoring systems include:
Enhanced Safety – Prevents roof falls and rock bursts in mining operations.
High Load Capacity – Supports heavy loads in tunneling and underground construction.
Corrosion Resistance – Extends service life even in harsh, wet environments.
Easy Installation – Designed for quick deployment, reducing downtime.
Ideal for coal mines, subway tunnels, and hydropower projects, our Mining Roof Bolts and Tunnel Support Bolts provide unmatched reliability. Choose our high-performance anchoring solutions for superior stability and cost-effective mining & tunneling support.
Product Parameters:
material | 20MnSi | ||||
Strength specifications | yield strength (MPa) | tensile strength (MPa) | tensile strength (%) | breaking load (KN/M) | Theoretical quality (KG/M)
|
φ16 | ≧335 | ≧490 | ≧16 | ≧100 | 1.6
|
φ18 | ≧335 | ≧490 | ≧16 | ≧126 | 2.0
|
Φ20 | ≧335 | ≧490 | ≧16 | ≧156 | 2.5
|
Φ22 | ≧335 | ≧490 | ≧16 | ≧189 | 3.0 |
Product Overview:
Equal-Strength Rock Bolt (Equal-Strength Rock Bolt) is a high-performance anchoring product widely used in Coal Mine Roof Support, Tunnel Reinforcement and Underground Construction. The product is a high performance anchoring product. Compared with traditional anchors, the Equal Strength Anchor is made of High-Strength Rebar, which has the advantages of equal strength in all segments, strong pullout resistance, easy installation, etc. It is suitable for all kinds of geotechnical reinforcement scenarios.
Product features:
(1) Equal strength design of the whole section
Adopting high-quality alloy steel (Alloy Steel) forging, to ensure that the strength of each part of the rod body is consistent, to avoid the weak point fracture.
Compared with ordinary anchors, the force is more uniform, reducing the phenomenon of stress concentration and improving the safety of support.
Product Manufacturing Process
(1) Raw Material Selection
High quality alloy steel (such as 20MnSi, BHRB600) is used to ensure high strength and toughness.
The steel is subject to ultrasonic testing to eliminate internal defects.
(2) Precision Rolling and Threading
The rods are molded by fully automatic Rolling Mill to ensure straightness and strength.
Rolled thread (Rolled Thread) process, to enhance the thread fatigue resistance.
(3) Heat treatment
Quenching & Tempering process to enhance the hardness and toughness of steel.
Ensure the anchor is not easy to break under impact load.
(4) Surface anti-corrosion treatment
Hot dip galvanized (average zinc layer ≥ 80μm), suitable for general wet environment.
Stainless Steel Cladding (Stainless Steel Cladding), suitable for strong corrosive mines.
(2) High strength tensile and pullout resistance
The tensile strength reaches more than 600MPa, which is suitable for deep mines, high stress tunnels and other harsh environments.
Combined with resin anchoring agent (Resin Cartridge) or cement grouting (Cement Grouting), it realizes ultra-high anchoring force.
(3) Strong corrosion resistance
The surface is treated with Hot-Dip Galvanizing or Epoxy Coating to extend the service life.
Suitable for wet, acid mine and other harsh geological conditions.
(4) Easy and efficient installation
Threaded or End-Anchored design for quick installation on all types of drilling rigs.
It can be equipped with quick anchoring agent to realize instant load bearing and improve construction efficiency.
How to use the product:
(1) Preparation before construction
Geological survey: determine the stability of the rock layer, choose the appropriate type of anchor rods and anchoring method.
Drilling: Use hydraulic drilling rig to drill holes, the hole diameter should be 4-6mm larger than the anchor diameter (e.g. Φ22 anchor with Φ28 drilling hole).
Clean the hole: Flush the hole with high pressure wind or water to make sure there is no rock debris left.
(2) Anchor installation steps
Resin anchoring method (rapid support)
Insert the resin anchor (Resin Cartridge) into the drill hole.
Advance the anchor by rotating the drilling rig and stir for 20-30 seconds to fully cure the resin.
Wait 1-2 minutes and tighten the nut to complete the support.
Cement grouting method (permanent support)
After inserting the anchor, fill with high strength cement grout (W/C=0.4-0.5).
Apply pre-tensioning force after 24 hours of maintenance.
(3) Quality control points
Pre-tensioning force test: use torque wrench to ensure that the design value (e.g. 150Nm) is reached.
Pull-out test: Sample test anchorage force to ensure ≥200kN (depending on project requirements).
Conclusion:
Equal-strength anchor rods have become the core support material for modern geotechnical engineering by virtue of the advantages of high strength, corrosion resistance and easy installation. Choosing high-quality anchor products can significantly improve the safety and economic benefits of the project.
For customized solutions or technical consultation, please contact our team of support experts!
