ABSTRACT

During research this model was transformed in about ten separate models and mining phases were simulated in each. A 0,3 m thick coal layer was modelled. It was assumed that a 0,3 m thick layer of coal would be left in floor during mining, and thickness of coal layer left in roof was variable (0,3, 0,5, 0,8 m). Depth of cut was 1,0 m, and maximum unsupported span in front of the support was 2,0 m.