大孔距深孔梯段爆破开采筑坝石料

深孔梯段爆破采用大孔距布孔方式，使炸药爆炸能量得以充分发挥，破碎率提高，大块度降低，从而获得较理想的堆石坝石料。本文着重介绍大孔距深孔梯段爆破的布孔原则、时差控制，以及在几个水利水电工程中的应用情况。

Quarrying of Rock Material for Construction of Dams by Largely Spaced Deep Hole Bench Blasting

Deep hole bench blasting method adopts largely spaced holes to bring explosives blasting energy into full play, to increase breaking rate and to reduce the number of large size blocks, thus to produce desirable rockfill materials. This paper puts stress on introduction to the principle of hole arrangement and time difference for largely spaced deep hole bench blasting as well as its application in some of the water conservancy and hydropower projects.