Coal Mining with Three-dimensional Stagger Arrangement Roadway Layout Method: a case study

This paper takes that several engineering examples of practical applications introducing the 3-D roadway layout of stagger arrangement method without coal pillars, which arranged the air intake roadway and air return roadway in different horizons, realizing the transformation of roadway arrangement from 2D system to 3D system. And expanding the original working face 31111 in coal seam 2# of Zhencheng Mine as project background, the paper makes systematic analysis to the geological, technical and economic factors, applies this new mining roadway layout technology for raising coal recovery ratio and solving the problems about full-seam mining in thick coal seam synthetically according to theoretical study and mining practice.