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Drawing mechanisms for top coal in longwall top coal caving (LTCC): A review of two decades of literature
This review details the state of the art in research on top coal drawing mechanisms in Longwall t op c oal c aving (LTCC) by examining the relevant...
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Numerical and theoretical investigations of the effect of the gangue-coal density ratio on the drawing mechanism in longwall top-coal caving
Discrete element calculations of the top-coal drawing process for different gangue-coal density ratios were conducted to investigate the effect of...
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Longwall top coal caving design for thick coal seam in very poor strength surrounding strata
Alpu lignite field is an important coal deposit with nearly 2 billion tons of coal resources located in the middle of Turkey. The mine deposit...
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Assessment of factors and mechanism contributing to groundwater depressurisation due to longwall mining
Assessment of mining impact on groundwater is one of critical considerations for longwall extension and sustainability, however usually constrained...
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Theoretical description of drawing body shape in an inclined seam with longwall top coal caving mining
Understanding the characteristics of drawing body shape is essential for optimization of drawing parameters in longwall top coal caving mining. In...
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Key technologies and equipment for a fully mechanized top-coal caving operation with a large mining height at ultra-thick coal seams
Thick and ultra-thick coal seams are main coal seams for high production rate and high efficiency in Chinese coal mines, which accounts for 44 % of...
