厦门市府大道扩建时的石方控制爆破

厦门市府大道扩建中 ,于复杂环境下 ,采用了小孔径、宽孔距分层开挖控制爆破技术方案。根据具体条件 ,确定了合理的爆破参数。对爆区四种类型建筑物 ,按不同的安全振速值 ,严格控制最大段装药量及 ρ值 ,同时进行了爆破震动监测 ,确保了建筑物的安全。采取控制爆破飞石的安全措施 ,在闹市中安全地实现了 2 6万m3石方的爆破开挖施工

EXCAVATION OF ROCK BY CONTROLLED BLASTING IN EXTENSION PROJECT OF GOVERNMENT AVENUE IN XIAMEN CITY

In the extension project of the government avenue in Xiamen City,a slice excavation technology using the controlled blasting with small hole diameter and large hole spacing was adopted in complex surroundings The reasonable blasting parameters were determined in accordance with concrete conditions According to different permitted peak particle vibration velocities corresponding to four types of construction,the maximum one interval charge weight and the ρ value were strictly controlled and the monitoring of blasting vibration was carried out,ensuring the safety of the constructions Through taking the safety precautions for the control of blasting flying rocks,the blasting excavating project with 26000m 3 of rock was,in safety,completed in the downtown area