Factory Rebar Gigh Quality Steel Bar Hrb335/Hrb400/Hrb500

1. Product Description

Mining anchor rods serve as core components for mine tunnel support systems. They primarily consist of Round Bars, high-performance materials supplied by Stainless Steel Round Bar Suppliers, and Round Metal Tubing components. This product series is specifically engineered for mining operations in complex geological conditions, featuring the following key characteristics:

Utilizes premium Round Bars as primary load-bearing elements, with diameters ranging from 16-32mm

Collaborative development with Stainless Steel Round Bar Suppliers for specialized corrosion-resistant rod bodies, adapting to highly corrosive mine environments

Innovative use of Round Metal Tubing as grouting channels, achieving dual functions of full-length bonding and prestressing

Market Application Advantages:

40% improvement in roadway support efficiency

25% reduction in support costs

Service life extended to 3 times that of traditional anchor rods

2.Specifications

Special Parameters:

316L grade rods supplied by Stainless Steel Round Bar Suppliers exhibit chloride ion tolerance up to 5000 ppm.

Round Metal Tubing grouting pipes feature a pressure resistance rating of ≥8 MPa.

3. Working Principle

Mine anchor rods achieve support effectiveness through a “three-stage” mechanism:

Immediate Support Stage:

Immediately after installation, a 50-80kN preload is applied via the tray.

The rod body and Round Bars jointly form an active support pressure arch.

Strength Development Stage:

The resin grout reaches design strength within 8-15 minutes.

Round Metal Tubing begins grouting to reinforce the fractured zone.

Long-Term Stability Stage:

The full-length grout body synergizes with corrosion-resistant rod bodies supplied by Stainless Steel Round Bar Suppliers

Forming a reinforced cylindrical zone with a diameter of 1.5-2m

Innovative Mechanism:

The composite structure of Round Bars and Round Metal Tubing achieves dual-mode performance: “rigid support + flexible pressure deflection”

Special thread design by Stainless Steel Round Bar Suppliers enhances load transfer efficiency by 30%

4. Structure and Materials

4.1 Rod System

Standard Rods:

Material: 20MnSiV Alloy Steel Round Bars

Diameter: Φ18/20/22/25mm

Length: 1.8-3.5m (customizable)

Corrosion-Resistant Rods:

Supplier: Stainless Steel Round Bar Suppliers

Material: 304/316L Stainless Steel

Surface Treatment: Sandblasting + Passivation (Ra=3.2μm)

4.2 Anchoring System

Mechanical Anchoring Section:

Expansion Sleeve: Q235 Steel

Lock Nut: Grade 8.8 High Strength

Grouting System:

Channel: Round Metal Tubing (Φ10×2mm)

Grouting Port: Quick-Connect Structure

4.3 Supporting Components

Pallet: Spherical adjustable type (supporting area ≥150 cm²)

Buffer Pad: Polymeric energy-absorbing material (deformation range 30–50 mm)

 5. Key Features

5.1 Safety and Reliability

Utilizes precision-rolled Round Bars with dimensional tolerances controlled to ±0.3mm

Medical-grade stainless steel supplied by Stainless Steel Round Bar Suppliers eliminates stress corrosion cracking

5.2 Construction Efficiency

Integrated grouting channels in Round Metal Tubing reduce drilling by 50%

Modular design enables single-bar installation in 3 minutes

5.3 Economic and Environmental Benefits

Bar body recycling rate reaches 90%.

Reduces concrete usage by 60% compared to traditional support systems.

5.4 Intelligent Monitoring Capabilities

Optional fiber optic monitoring for Round Bars.

Real-time transmission of stress and strain data.

6. Application Fields

6.1 Metal Mining

Deep copper mine roadway support (buried depth >800m)

Lead-zinc mine fracture zone reinforcement

6.2 Energy Extraction

High-stress coal mine roadways

Shale gas well roadway support

6.3 Special Conditions

Subsea mineral extraction (utilizing Stainless Steel Round Bar Suppliers' super duplex steel)

Arctic mining regions with sub-zero temperatures (-50°C while maintaining toughness)

Typical Project Case: A gold mine successfully traversed a 20m fractured zone using Φ25mm Round Bars + Round Metal Tubing composite bolts, saving 1.2 million yuan in support costs.

7. Installation and Usage

7.1 Standard Installation Procedure

Drilling Positioning:

Borehole diameter 6-8mm larger than rod body

Borehole depth deviation ≤±50mm

Bar Assembly:

Pre-assemble Round Bars with Round Metal Tubing

Install grout stopper (1m from hole bottom)

Anchoring Construction:

Adjust resin cartridge quantity based on rock properties (typically 2-3 cartridges)

Control mixing time at 20±5 seconds

Grouting Reinforcement:

Water-cement ratio 0.4-0.45

Grouting pressure 0.5-1MPa

7.2 Critical Control Points

Exposed length of Round Bars must be uniform (100±10mm)

Stainless Steel Round Bar Suppliers products require specialized installation tools

Round Metal Tubing must undergo water flow testing prior to grouting

7.3 Acceptance Criteria

Pull-out test: ≥90% of design value

Grout saturation: Ultrasonic testing ≥85%

Pre-tension deviation: ≤±5%