行走速度太慢，钻孔移位慢，钻孔后撤离爆破现场的动作也慢，影响整个工程的进度。
But too slow travel speed is directly related to slow drilling displacement and slow evacuation from the explosion site after drilling, which will influence the overall project's schedule.
结果表明现爆破下平硐是稳定的，规范中给定的岩体极限抗震速度有些保守。
The results indicate that the adit is stabile and the value of the given critical antivibration velocity of rock is a little low.
此外，文中提出了一个适用于多排孔延时爆破振动速度预测模型的依据公式。
Besides, a basis formula of vibration velocity prediction model that is suitable for multi-row millisecond blasting was proposed.
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