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引言 假定McCory Lake矿山目前处于规划阶段。钻井结果表明:矿山将是高品位、低吨位投资。用7天一周期的时间来规划这个位于加拿大北部的矿山。7天中,工作人员每天将工作12小时,以后的7天,他们将飞回他们家中。 目前,规划小组正考虑三种采矿方法（图式各样Ⅰ-1）: （a）严格的充填开采法; （b）深孔崩落回采法; （c）垂直后退式开采法。 这些采矿方法正在研究之中,原因是矿石和围岩与已知矿石带的泥浆层的接合面高度断裂。根据该地区其他矿山运行的经验表明:在这个矿石带将需要大量的地层支架,或者是工作人员必须远离矿石进行作业,要么进行遥控操作,要么从远离矿石的比较稳定的巷端钻比较长的钻孔直达矿石。 矿井的入口将通过立井设置在底帮。假定:不考虑选定的采矿方法,用于立井、通风天井和列于表Ⅰ-1中的全部项目,对于这三种采矿方法而言其代价将是通用的。为简便起见,将这些通用的代价加进为每种
Introduction It is assumed that the McCory Lake mine is currently in the planning stage. Drilling results show that: the mine will be high-grade, low-tonnage investment. Plan the mine in northern Canada with seven days a week. In seven days, the staff will work 12 hours a day, seven days later, they will fly back to their home. At present, the planning team is considering three mining methods (Figure 1-1): (a) rigorous filling and mining method; (b) deep-hole caving mining method; and (c) vertical and backward mining method. These mining methods are under investigation because of the highly fractured joints between the ore and the surrounding rock and the mud layer of the known ore zone. Based on the experience of other mines in the area, it has been shown that a large number of strata support will be required in this ore belt or that workers must operate away from the ore or operate remotely or from more stable roadside audiometry Drill straight to the ore. The entrance of the mine will be set at the bottom of the shaft through the shaft. Assumptions: Irrespective of the mining method selected, it will be common for all three of these mining methods to be used for vertical wells, ventilated patios and all of the items listed in Table I-1. For the sake of simplicity, add these common costs to each