In order to spread this technique, I have made trial VSP modeling during shothole drilling: shallow seismic velocity survey during shothole drilling.
为了应用和推广这一新技术，我们做了随钻VSP模拟试验，即地表浅层炮井随钻地震速度测量。
The degree of Shothole utilization ratio in construction of hard-rock tunnel has relation to project advance rate and cost of the tunnel.
硬岩隧道施工中炮眼利用率的大小关系着隧道的工程进度和工程成本。
The degree of Shothole utilization ratio in construction of hard-rock tunnel has relation to project advance rate and cost of the tunnel.
硬岩隧道施工中炮眼利用率的大小关系着隧道的工程进度和工程成本。
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