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水电站的引水隧洞开挖一般都要求光面爆破。光面爆破的费用比普通爆破的费用要高,一方面表现在工、料、机的消耗数量上(参见原水利电力部86预算定额第52页有关说明),另一方面也表现在火工材料的单价上。水电定额的平洞石方开挖(风钻钻孔,下同)子目的材料定额中有雷管与火线项目但未注明其类别。水电定额的总说明中关于材料的选择都有一条这样的说明“材料定额中,凡未列示品种规格的,均可根据设计选定的品种规格计算,但定额数量不得调整”。按照此说明,如果实际使用非电毫
Hydropower station diversion tunnel excavation generally require smooth blasting. The cost of smooth blasting is higher than the cost of ordinary blasting, on the one hand in the amount of work, material and machine consumption (see the description on page 52 of the original budget of the Ministry of Water Resources), on the other hand, Unit price on the material. Hydropower fixed flat hole stone excavation (air drill hole, the same below) sub-purpose material quota in the detonator and FireWire project but did not indicate its category. The general description of hydropower quoted on the choice of materials have a such description “material quota, where not listed in the specifications, can be calculated according to the specifications of the selected varieties, but the fixed amount can not be adjusted ”. According to this note, if the actual use of non-electric milli