Coal Mine Rebar

1. Product Overview

Resin anchors represent a revolutionary geotechnical support material. By combining CMC Rebar Near Me (locally sourced high-strength rebar), Coil Rebar (coiled rebar), or Concrete Steel Rods (threaded steel rods for concrete) with specialized resin anchoring agents, they form an efficient rock mass reinforcement system. This product is particularly suitable for coal mine tunnels, tunnel engineering, slope support, and similar applications. Its core advantages include:

Instant Anchoring: Resin cures in just 3-5 minutes

Ultra-High Load Capacity: Individual anchors achieve tensile strengths exceeding 200kN

Environmental Adaptability: Operational from -20°C to +50°C

Compared to traditional mechanical anchors, resin anchors offer 300% greater bond strength. They are particularly suited for rapid localized installation with CMC Rebar Near Me, while Coil Rebar's flexibility provides unique advantages in curved tunnels.

2. Working Principle

Resin anchors achieve mechanical force transfer through a “sandwich” structure:

Drilling Preparation: Hydraulic drilling rigs create precise boreholes (typically Φ28-32mm)

Agent Activation: Two-component resin cartridges (Component A: unsaturated polyester + Component B: curing agent) are inserted to the bottom of the hole

Rod Insertion: Rotate Concrete Steel Rods into the hole to fracture and mix the resin cartridge

Curing Reaction: Resin achieves initial setting within 3 minutes and full strength within 15 minutes

Stress Distribution: Mechanical interlocking between the ribbed surface of the rods and the cured resin transfers rock mass loads to stable strata

The key innovation lies in the ability to achieve continuous support when using Coil Rebar, reducing weak joints and enhancing overall stability.

3. Structure and Materials

Core Components:

Rod System:

Material: 20MnSiV high-strength alloy steel (yield strength ≥500MPa)

Structure: Full-threaded/end-anchor type, surface treated with HRB500-grade rolled threads

Specifications: Φ16-25mm, length 1.5-3m (CMC Rebar Near Me offers customization)

Anchoring System:

Resin Cartridges: Unsaturated polyester + quartz sand filler (diameter Φ23/28/35mm)

Curing Agent: Benzoyl peroxide (3-5% content)

Complementary Components:

Tray: Q235 steel plate stamped (120×120×10mm)

Nut: Forged anti-loosening nut made of 45# steel

For special conditions, continuous fiber-reinforced composite (FRP) rods manufactured from Coil Rebar can be used, offering 10 times greater corrosion resistance.

4.technical parameter

5. Key Features

5.1 Revolutionary Anchoring Performance

Curing speed 20 times faster than cement-based anchors

Bond strength 3-5 times that of mechanical anchors

Supports both full-length and end-anchor modes

5.2 Smart Construction Advantages

Integrated with CMC Rebar Near Me local inventory enables 30-minute rapid cycle: “Drill-Install-Cure”

Coil Rebar version supports mechanized continuous installation, boosting efficiency by 400%

5.3 Exceptional Durability

Resin layer forms corrosion barrier with service life exceeding 20 years

Fatigue resistance: >90% strength retention after 2 million load cycles

5.4 Eco-Friendly & Safe

Zero-VOC emission eco-friendly resin formulation

Anti-static design (surface resistance < 1×10⁸Ω)

6. Application Fields

6.1 Underground Engineering

Coal mine roadway support (60% market share)

Initial support for subway tunnels

Reinforcement of hydraulic tunnels

6.2 Geotechnical Engineering

Emergency slope stabilization

Temporary excavation pit support

Overburden maintenance in mining workings

6.3 Special Applications

Anchoring for nuclear power plant surrounding rock (requires stainless steel concrete steel rods)

Corrosion-resistant support for undersea tunnels (epoxy-coated coil rebar)

Case Study: A Yangtze River tunnel project utilized Φ22mm resin anchors + CMC Rebar Near Me locally sourced materials, achieving a construction record of 25m daily advance.

7. Installation and Usage

7.1 Standard Construction Procedure

Drilling and Positioning: Total station layout, hole diameter deviation ≤±2mm

Hole Cleaning: High-pressure air blowing (drainage required when high moisture content)

Resin Injection: Z2355 resin cartridges (combination of fast/medium/slow-setting types)

Rod Installation: Connect mixing head to drilling rig for rotational advancement (300 rpm)

Tray Tightening: Apply 50-80kN preload after 30 minutes

7.2 Critical Control Points

Resin Temperature Sensitivity: Preheat cartridges below 5°C

Coil Rebar installation requires dedicated continuous rod feeding equipment

Increase grout dosage by 20% in fractured rock formations

7.3 Acceptance Criteria

Pull-out test: Conducted after 72 hours; displacement ≤ 2 mm/10 kN

Infrared inspection: Verify uniform resin curing

8. Quality Control and Standards

8.1 Full-Process Quality Assurance System

Raw Materials: Steel conforms to GB/T1499.2-2018; Resin certified under REACH

Production Process: Online eddy current testing (defect detection rate ≥99.7%)

Final Inspection: 100% thread go/no-go gauge testing

8.2 Core Certifications

Coal Mine Safety Certification: MA/KC Mark

International Standard: EN1537:2013 Anchor Rod Standard

Seismic Certification: Complies with GB50011-2010 Seismic Code

8.3 Quality Traceability

Unique laser-engraved codes on each batch of rod bodies

Resin cartridges packaged in vacuum-sealed aluminum foil (18-month shelf life)

9. Supply and Services

9.1 Flexible Supply Solutions

Standard Inventory: Φ18-22mm CMC Rebar Near Me standard components (24-hour delivery within the Yangtze River Delta region)

Custom Solutions: Φ40mm oversized diameter anchor rods (requires 15-day production cycle)

Coil Rebar Solution: Includes vehicle-mounted continuous installation equipment

9.2 Value-Added Services

On-site Technical Guidance: Engineer-led demonstration for first-piece installation

Digital Management: Cloud-based anchor load monitoring platform

Emergency Response: Regional 2-hour service coverage

9.3 Full Lifecycle Assurance

5-year quality guarantee

Complimentary anchorage calculation software

Recycling service for end-of-life anchor rods