浅孔爆破
For this reason, the second stage was chosen at the end of flood season and the excavations were performed using shallow hole blasting and thin layer excavation methods. This approach improved construction effectiveness and reduced the time loss to the minimum.
根据实际情况,二期开挖从时间上选择在汛末,从技术上采取薄层开挖、浅孔爆破、导爆管爆破等方法,取得了较好的效果,从而把工期延误减少到最小。
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