Multi-condition simulation analysis of a sliding hydraulic support system based on elastoplastic mechanics
Changji Wang1,2, Wanting Wang3, Yu Guo4
1School of Chemical and Blasting Engineering, Anhui University of Science and Technology, Huainan, 232000, China.
Scientific Reports
|May 9, 2024
Summary
A novel self-moving hydraulic support system effectively addresses deep coal mine roof support challenges. Numerical simulations confirm its stability, ensuring safe operations in fractured rock environments.
Area of Science:
- Mining Engineering
- Geotechnical Engineering
- Mechanical Engineering
Background:
- Deep coal mines face challenges supporting fractured and weak surrounding rock.
- Continuous roof support is difficult in such environments, particularly in China's Huainan region.
Purpose of the Study:
- To design and develop a self-moving hydraulic support system for enhanced roof support in deep coal mines.
- To analyze the mechanical behavior of the hydraulic support system under various operating conditions.
Main Methods:
- Developed a self-moving hydraulic support system.
- Utilized elastoplastic mechanics theory to establish a numerical analysis model.
- Calculated displacement, stress, and strain of supports during the stepping process.
- Verified numerical simulation results with field data from an actual working site.
Main Results:
- Numerical simulations were conducted for three operating conditions.
- Maximum equivalent stresses were 245.33 MPa, 246.82 MPa, and 245.27 MPa for the respective conditions.
- All calculated maximum stress values remained below the material's yield strength, indicating normal operation.
Conclusions:
- The self-moving hydraulic support system meets operational requirements for stability and reliability.
- The findings provide a theoretical framework for assessing hydraulic support systems and optimizing construction processes in deep mining.
- The developed system offers a viable solution for supporting fractured and weak roof structures in challenging mining conditions.
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