以铜仁市芭蕉川硐片区棚户区改造区建筑基坑为工程背景，为减小基坑爆破开挖震动和飞石对周边既有建筑物和道路的影响，依据基坑地质条件和开挖方式，采用经验类比和理论计算方法确定了基坑微差爆破重要参数，工程实践证明：分区、分层基坑开挖采用深浅孔爆破和预裂微差爆破相结合的方式，减小了对周边环境的影响，爆破振动、空气冲击波、噪音和飞石的危害效应控制在允许范围之内，爆破形成的振动波到达保护物处最大垂直速度均小于2 cm/s，覆盖方式能够控制飞石距离，确保了对周边民房、碧江区环北街道—环东路及基础设施未造成破坏。可为类似工程提供参考。
Based on the background of the construction foundation pit in shanty area of Bajiaochuandong District, Tongren City, in order to reduce the impact of blasting excavation vibration and flying stone on the existing buildings and roads around the pit, the important parameters of millisecond blasting in foundation pit are determined by empirical analogy and theoretical calculation depond on the geological conditions and excavation methods of foundation pit. Engineering practice has shown that the combination of deep and shallow hole blasting and pre crack micro difference blasting is adopted for the excavation of sub zone and layered foundation pit, which reduces the surrounding excavation. The impact of environment, the damage effect of blasting vibration, air shock wave, noise and flying stone is within the allowable range. The maximum vertical velocity of the vibration wave formed by blasting to the protection is less than 2 cm/s, and the covering method can control the distance of flying stone, which ensures that there is no damage to surrounding houses, North Ring Street first ring eastern road and infrastructure in Bijiang district. It can provide reference for similar projects.
