Engineering
4 years ago

Optimal coal pillar width revolutionizes island longwall panel stability!

Advances in Civil Engineering
Numerical Study on Soft Coal Pillar Stability in an Island Longwall Panel
Qingyun Xu, Jianbiao Bai, Shuai Yan, Rui Wang, Shao-xu Wu

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The study investigated the stability of coal pillars in a soft coal mine. By analyzing stress distribution and deformation around the pillars, researchers found that a coal pillar width of 5.0 meters is the most effective in controlling rock deformation. This width minimizes the plastic zone in the surrounding rock and reduces roadway deformation during mining. The study suggests that a coal pillar width of 5.0 meters is the best choice for maintaining stability in similar geological conditions.