CoalMine Roof Bolting

This is provides a detailed explanation of how roof support in underground coal mines achieves rapid and safe pressurization and fluid make-up.

features & advantages

  • Feature 1

    Explosion-proof by nature – fully air-driven, no electrical ignition source.

  • Feature 2

    High reliability in coal mines with high gas, dust, and humidity.

  • Feature 3

    Simple structure, easy maintenance, fast parts replacement.

  • Feature 4

    Low cost, lightweight, easy to transport underground.

  • Feature 5

    Fast response pressure boosting, suitable for roadway supports and hydraulic jacks.

Product Description

CoalMine Roof Bolting Rapid Pressurization and Fluid Make-up Technology Analysis

Core Definition and Functions

CoalMine Roof Bolting Rapid Pressurization and Fluid Make-up is a key technology in mine hydraulic support systems, primarily achieving two major functions:

Rapid pressure recovery: Quickly increasing the working pressure of hydraulic props, hydraulic beams, and shield supports through hydraulic power units to ensure the supporting force meets roof control requirements and reduce the risk of roof collapse accidents.

Working medium management: Supplementing/replacing hydraulic oil or water-based emulsion during system operation or maintenance to maintain system cleanliness and the service life of hydraulic components.

Technical Implementation Solutions

1. Pneumatic Pressurization Scheme
  • Driving principle: Using compressed air to drive the pressurization mechanism or pneumatic-hydraulic booster.
  • Medium characteristics: Water-based emulsion or clean water with added surfactants is used, significantly reducing flammability and spark risks.
  • Application scenarios: Suitable for explosive environments such as high gas concentrations, making it a safe choice for underground mines.

2. International Mainstream Scheme
  • Power configuration: Centered on an electric hydraulic power unit, combined with accumulators and hydraulic boosters.
  • Medium selection: High-performance synthetic hydraulic oil (oil-based media have higher density and obvious advantages in transmission efficiency).
  • Technical features: Integrated with automatic control systems, widely used in Europe, North America, Japan, and Australia.

3.Environmental Adaptability Design
  • High-risk environments: Pneumatic systems or explosion-proof certified electric units are preferred.
  • Medium innovation: Water-based media optimize lubrication performance through emulsifiers, balancing safety and mechanical efficiency.
  • Development trend: Automated monitoring and intelligent make-up systems are gradually popularized, enabling real-time pressure regulation and leakage warning.

Technical Advantages Analysis of Coal Mine Roof Bolting Pneumatic Pressurization Equipment

Core Technical Architecture

  • Equipment Type: Pneumatic drive + clean water/emulsion medium system
  • Power Source: Static pressure mine water above 1MPa or underground compressed air
  • Operation Capacity: Supports 24-hour continuous trouble-free operation

Five Core Advantages

  1. High safety in coal mine underground
  2. Adaptability to non-electric/power-limited areas
  3. Total life cycle cost advantage
  4. Distributed flexible deployment
  5. Reliability in extreme environments

 

 

 

Equipment Parameters

Parameter 2ZYBQ2.5/20 2ZYBQ4.0/31.5 2ZYBQ7.5/20 2ZYBQ11/20 2ZYBQ11/35
Rated Pressure 20 MPa 31.5 MPa 20 MPa 20 MPa 35 MPa
Rated Flow 2.5 L/min 4.0 L/min 7.5 L/min 11 L/min 11 L/min
Air Supply Pressure 0.5 MPa 0.5 MPa 0.5 MPa 0.5 MPa 0.5 MPa
Air Supply Flow 0.4 m³/min 0.6 m³/min 0.7 m³/min 0.7 m³/min 1.4 m³/min
Plunger Quantity 2 2 2 2 2
Plunger Diameter 15 24 30 45 45
Overall Weight 25 kg 35 kg 45 kg 56 kg 56 kg
Dimensions (mm) 450×350×350 535×400×500 535×400×500 600×490×500 635×490×500

 

 

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