Simulation of Top Coal Drawing Ways of Fully Mechanized Caving and Repeated Mining Face Passing Through Abandoned Roadway

In order to research the way of top coal drawing in fully mechanized caving and repeated mining face passing through abandoned roadway with large section, taking 2101 fully mechanized caving and repeated mining face of Songzao Coal Mine as the background, computer simulation is used to compare and analyze the effect of three ways of top coal drawing when fully mechanized caving and repeated mining face passes through abandoned roadway with large section. The results show that when the simulated top coal reserve is 29.17 t, the top coal can be discharged up to 27.17 t by using one coal caving method. The releasing rate and the waste rock content is 91% and 15% respectively.