2013•Coal Mining TechnologyRequires access

Analysis of Different Top-coal Caving Techniques of Full-mechanized Caving Mining Shallow-buried Medium-hard and Extremely-thick Coal-seam

XU Kai-yu

Abstract

By underground test in 12108 Full-mechanized Caving Mining Face with 7m thick coal-seam in Liuta Colliery of Shendong Coal Corporation,the influence of different top-coal caving techniques on minig-to-caving ratio,top-coal recovery ratio,mining speed and efficiency was analyzed.Results showed that after applying full-mechanized caving mining method,roof safe factor increased,initial investment decreased and recovery ratio added,could realize the goal of safe,high-production,high-efficiency and high mining ratio,which provided rational theoretical basis for mining similar coal-seam.

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Key concepts: Mining engineering, Coal, Coal mining, Roof, Engineering, Geotechnical engineering, Waste management, Civil engineering