【摘要】 根据急倾斜矿井深部采区的一系列新的特点 ,采用折返式上山系统 ,重新选择上山眼煤层 ,改革上山眼内部支护方式 ,提高阶段垂高 ,降低万吨掘进率 ,缩短采区准备时间 ,大大提高了技术经济效益更多还原

【Abstract】 Based on a series of new characters of deep mining area in steep-grade mine,adopt reciprocating rise system, choic new tophole seam,reform the inner support form of tophole,lift bench height,drop ten thousand ton drivage ratio,reduce mining preparation time so as to lift technical and economic benefit.更多还原