Top Coal Caving Method for Middle Hard Thick Coal Seam in Shendong Coal field

摘要

Erdos Dongsheng coal field belong to the Jurassic coal field with the best mining conditionat the present time in China. The seam is stable with low gas, short rushing water, think layer rock andlittle ground pressure. Shendong has to face how to extract 7 to 9m middle hard thick coal seamrecently. Top coal caving mining method was applied in Shendong Liuta coal mine. It was obtainedsuccessful results with maxim output reaching 640,000tons per month and 27,000tons per day. The keytechnology which was applied in this coal mine was high resistance powered support, great cuttingheight and low rate of cutting and caving.