奥运飞碟靶场石方深孔控制爆破开挖

介绍了中深孔爆破在奥运场馆石方开挖中的应用。在复杂环境下,采用孔外多段毫秒延时、低单耗、加长填塞等技术措施,很好地控制了爆破振动及飞石的危害。在不良地质条件下采用预裂爆破技术,优化预裂爆破参数,保证了边坡的平整。此实施经验可为同类条件下的爆破提供参考。

ROCK EXCAVATION IN CONSTRUCTION OF OLYMPIC GAMES FLYING-SAUCER STADIUM BY LONG-HOLE CONTROLLED BLASTING

The application of the technique of the excavation by longhole blasting in construction of Olympic Games stadium was introduced in this paper.The blasting was conducted in complicated surroundings and reached good effect in terms of controlling the danger of blasting vibration and fly rock by the employed techniques like out-hole millisecond delay blasting,charge underloading and stemming lengthening.Regarding the complicated geological condition the adoption of presplitting blasting with optimized blasting parameters guaranteed the side slope integrity.The paper summarized and provided some experiences of the construction.