| 摘要 |
PURPOSE:To reasonably, exactly, simply and rapidly determined them by calculating a charge quantity, charge length, inclusive length, hole interval length and the like accompanying it by the use of a specified expression from hole length, hole diameter, an explosive quantity per rockbed and the like which are optional selective items. CONSTITUTION:Optional selective items such as hole length: 100L(cm), hole diameter: R/10(cm), charge specific gravity: 1 and charge quantity per rockbed: R/10<6>(g/cm<3>) are determined, hole interval length and stemming length: Y(cm) is determined from the relation of an expression 1 and further charge length: 100(L-Y)(cm), charge quantity: pi/4D<2>(L-Y)(g), breakage rockbed quantity: 10<6>LY<2>(cm<3>) are determined from their numeric value. Therefore, even if unskilled workers perform work when the work is made, errors are not made and an accident of flying stones and the like can previously prevented. |
