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Updated: Sep 4, 2025

A Uniaxial Compression Experiment with CO2-Bearing Coal Using a Visualized and Constant-Volume Gas-Solid Coupling Test System

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Coal mine entry rating system: A case study.

Mark A Van Dyke¹, Ted M Klemetti¹, Craig Compton¹

¹National Institute for Occupational Safety and Health, Pittsburgh Mining Research Division, Pittsburgh, PA 15236, USA.

International Journal of Mining Science and Technology

|July 15, 2022

Summary

This summary is machine-generated.

Researchers developed a new rating system to assess coal mine entry performance by evaluating ground control products and installation methods. This system helps understand how various factors influence mine stability and safety.

Keywords:

Coal Geology Rating system Support

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Area of Science:

Mining Engineering
Geotechnical Engineering
Occupational Safety

Background:

Coal mine entry performance is influenced by geology, overburden, bolting, and mine design.
Existing methods for evaluating mine entries lack comprehensive system-based analysis.
The National Institute for Occupational Safety and Health (NIOSH) initiated research to address these limitations.

Purpose of the Study:

To develop a novel numeric rating system for assessing coal mine entry conditions.
To establish a flexible system that integrates various performance factors.
To improve the accuracy and confidence level of mine entry inspections.

Main Methods:

Creation of a numeric rating system based on visual observations.
Implementation of the rating system across three different coal mines.
Evaluation of ground response considering geology, bolting patterns, mining-induced stresses, overburden, and time.

Main Results:

The new rating system provides a flexible approach to evaluating mine entry conditions.
The system allows for varying levels of confidence based on inspection time.
Preliminary implementation demonstrated the system's utility in diverse mining environments.

Conclusions:

The developed rating system offers a more comprehensive approach to understanding coal mine entry performance.
This system facilitates better assessment of ground control product effectiveness and installation methods.
Further research can refine the system for enhanced mine safety and operational efficiency.