福堂水电站圆筒阻抗式调压井工程开挖直径31。
At Futang hydropower station, the cylinder restricted surge tank is 31.
陡倾角、大直径、长斜井开挖施工难度大、危险程度高。
The excavation of long shaft under high dip Angle and large diameter has a big difficulty and a high risk.
介绍在边坡保护层开挖爆破中采用小直径低爆速炸药的试验情况及取得的良好效果。
The experiment about using slim hole and cool explosives to excavate a slope protection layer in excavation blasting is introduced, and excellent effectiveness is achieved.
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