Gob-side Entry Retaining Technology in 11#Coal Seam of Kaituo Coal Industry Co.,Ltd.
With the gradual depletion of exploitable resources in the first level 2#and 3#coal seams of Kaituo Coal Industry Co.,Ltd.,horizontal deep mining of 11#coal seam began.Based on the mining experience of 2#and 3#coal seams,the mining plan for 11#coal seam was optimized.The horizontal mining face of Kaituo Coal Industry Co.,Ltd.adopted the traditional layout plan of one working face and two crossheadings.Due to the small area of the mining field,the dynamic pressure overlapping area was prone to mutual influence when the mining face and the mining face advanced in the opposite direction,resulting in tunnel deformation and maintenance difficulties.The coal pillars left between the two mining faces also caused resource waste,and the excavation of multiple crossheadings in the mining face increased labor costs and tunnel excavation costs.
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