Related Experiment Video
Updated: Jan 6, 2026
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
9.1K
Numerical simulation of induced cutting in deep coal
Si-Fei Liu1,2, Shuai-Feng Lu1,2, Zhi-Jun Wan1,2
1Key Laboratory of Deep Coal Resource Mining (CUMT), Ministry of Education of China, China University of Mining and Technology, Xuzhou 221116, People's Republic of China.
Royal Society Open Science
|October 11, 2019
Summary
This study investigates deep coal cutting using a three-drum shearer, revealing how confining pressure and central cutting impact performance. Increased pressure affects crack propagation and cutting forces, with central cutting showing complex influences on efficiency.
Area of Science:
- Mining Engineering
- Rock Mechanics
- Computational Geomechanics
Background:
- Deep coal cutting is a critical area of research in modern mining operations.
- Understanding the mechanical behavior of coal under various conditions is essential for optimizing cutting efficiency and safety.
- Previous studies have laid the groundwork for investigating advanced cutting technologies.
Purpose of the Study:
- To propose and analyze the cutting technology of a three-drum shearer for deep coal seams.
- To investigate the influence of confining pressure on coal cutting performance using numerical simulations.
- To evaluate the induction effect of central cutting on coal cutting performance and energy consumption.
Main Methods:
- Utilized the discrete element method (DEM) to simulate coal cutting processes.
- Employed PFC2D software for numerical simulations under varying boundary conditions.
- Analyzed crack propagation, cutting forces, debris generation, and specific energy consumption.
Main Results:
- Increasing confining pressure alters crack development towards the free surface, influencing debris and cutting force trends (initial increase then decrease).
- Central cutting promotes crack propagation towards the free surface, leading to higher peak cutting forces and specific energy consumption with increased confining pressure.
- The reduction in peak cutting force and specific energy consumption due to central cutting shows a complex dependency on confining pressure.
Conclusions:
- Confining pressure significantly impacts coal cutting mechanics, affecting failure modes and energy requirements.
- Central cutting strategies can enhance crack development but require careful consideration of confining pressure for optimal results.
- The findings provide valuable insights for designing and operating deep coal cutting equipment more effectively.
