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Updated: Jul 13, 2025
10:27
A Uniaxial Compression Experiment with CO2-Bearing Coal Using a Visualized and Constant-Volume Gas-Solid Coupling Test System
Published on: June 12, 2019
8.7K
Cracking Behavior and Stress Field Evolution in Coal Specimens Containing Bedding under Uniaxial Compression
Chang Guo1,2, Zedong Wang1, Ting Liu2
1College of Quality and Safety Engineering, China Jiliang University, Hangzhou 310018, China.
ACS Omega
|October 16, 2023
Summary
This study reveals how bedding inclination angles affect coal strength and deformation. Understanding these structural anisotropies is crucial for safer underground mining and gas disaster prevention.
Area of Science:
- Geotechnical Engineering
- Rock Mechanics
- Computational Modeling
Background:
- Underground mining encounters coal seams with varying bedding structures.
- Bedding structures significantly influence coal seam strength, deformation, and gas-related hazards.
- Limited data exists on the mechanical properties of coal with bedding-induced structural anisotropy.
Purpose of the Study:
- To investigate the mechanical properties of coal specimens with bedding structures.
- To analyze the impact of varying bedding inclination angles on coal behavior.
- To understand crack propagation and stress field evolution in anisotropic coal.
Main Methods:
- Numerical modeling using the particle flow code (PFC) method.
- Simulation of coal specimens with bedding at different inclination angles.
- Laboratory tests for validation of numerical results.
Main Results:
- Bedding inclination angle significantly impacts mechanical properties and crack patterns.
- Analysis of temporal and spatial evolution of stress fields during loading.
- Identification of three distinct crack initiation patterns based on bedding angles.
- Quantitative relationship established between mechanical properties and fractal dimension.
Conclusions:
- Numerical simulations provide valuable insights into the anisotropic mechanical behavior of coal.
- Findings enhance understanding of coal seam response to stress and deformation.
- Results contribute to improved gas extraction and disaster prevention strategies in underground mining.
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