中文摘要：

针对露天矿田内出现无煤区，其上覆产生无效剥离量，为解决过渡无煤区期间生产剥采比增加、运距增大、煤量接续困难等问题，提出了一种露天煤矿过无煤区留“岛”开采新方法。系统研究了“岛”后搭桥、“岛”前滞后剥离的运输方式，优化留“岛”搭桥运输系统，动态模拟搭桥、拆桥衍变过程，提出过无煤区期间生产能力接续措施。研究成果在神华北电露天煤矿首采区过渡无煤区期间得到了应用，结果表明：对于露天矿田境界内出现无煤区，留“岛”开采方案有效降低了生产剥采比，“岛”后运输搭桥方式可减小运距，降低运输成本，提高矿山经济效益。

英文摘要：

Non-coal-zone in surface coal mine usually causes invalid stripping and increases stripping ratio. In order to solve the problem of increased stripping ratio and transportation distance, and overcome the connection difficulty of coal amount, a new method of leaving an “island” and building a bridge is put forward. A systematic study is made on the optimization transportation system of building a bridge behind the island. At the same time, the procession of building and taking down the bridge and accelerating the path is simulated, and measures for production capacity connection are put forward. The simulation achievements are applied to Shenhua Beidian surface coal mine and the results show that leaving “islands” and building bridges project can reduce the stripping ratio and transportation costs. Moreover, the economic benefit can be improved.