2005•Coal Mining TechnologyRequires access
Research and practice on retaining sand-proof pillar mining in thin seam in yangcun coal mine
Liu Xiu-e, Xu Yanchun, Kong Qing-jun, Liu Chenglin
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Abstract
Based on the exact understanding of water abundance in the 3~(rd) unconsolidated aquifer and the rule of overlying strata damage in thin seam,the influence of water inrush on working face is estimated,the feasibility of retaining sand-proof pillar mining in the 2~(nd) mining area in Yangchun Colliery is demonstrated and the safety mining is realized successfully.The height of sand-proof pillar of Yangchun Colliery in thin seam is reduced from 30m to 10.42m and 6.38Mt coal under water body is able to be mined now.