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中文摘要：
根据哈尔乌素露天矿生产实践,借鉴其他矿山建立开拓运输系统的先进经验,提出在工作帮和非工作帮之间剥离物料的“重心”处搭建中间迈步式“桥”,形成中间搭桥开拓运输系统.根据矿山台阶尖灭生产现状,利用数学建模的方法,建立矿山下部水平剥离物料“梯形模型”.对梯形模型物料流移运划分为中间桥运输和端帮运输2部分,计算2部分的运输功.与传统搭桥方式进行进一步对比分析各自汽车运距、运输成本、企业的经济效益等方面.经研究得知：在哈尔乌素露天煤矿下部水平进行沿物料重心搭建运输桥最为经济合理,可减少内排运输功29 Mm3·km,同时实现靠帮开采,每年多采出煤炭44.8万t,整体经济效益每年增加8 252.2万元.
英文摘要：
According to production practices of Haerwusu Surface Mine,learning from other mines＇ advanced experience about the transport system, the idea for building a middle-style ＂bridge＂ to form an intermediate bridge transport system at ＂center of gravity＂ of stripping materials between work slope and non-work slope is put forward. In accordance with the mine production status of beach pinchout, using mathematical modeling method, the trapezoidal model of stripping materials in the lower level of the mine was established. Then, the model for movement of materials was divided into two parts, the middle bridge transport and the end slope transport. Further comparison with the traditional bridge was made from aspects of automo- bile transport distance, transport costs, and other economic benefits. The study showed that it is the most economical and rea- sonable to build the transport bridge along the ＂center of gravity＂ in lower level of Haerwusu surface mine. It can reduce the transport work of internal drainage by 29 Mm3 · km, and achieves steep end-slope mining. By this method, more than 448 000 t of additional coal resources are recovered each year with overall annual increase of 82. 522 Millions yuan in economic benefit.
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