缩短矿井建设周期的经济效果包括施工单位获得的效果和生产单位因矿井提前投产所获得的效果。主要由于减少固定费用而产生的经济效果K中一分别为矿井在额定的和实际的适设期间基适投资的总和; T,K,=K〔ad+a(z一d)C_+b二里〕…(2) 甲H巧l’式中a-予标中可变费用所占百分数; The economic results of shortening the mine construction cycle include the effect obtained by the construction unit and the effect obtained by the production unit due to the early putting into operation of the mine. The economic effect, which is mainly due to the reduction of fixed costs, is the sum of the investment of the mine during the nominal and actual fit-up periods, respectively; T, K, = K [ad + a In] (2) A H Q l ’where a- standard variable percentage of the percentage of the cost;