重庆大洪河电站5号机扩建工程爆破震动监测

介绍了重庆大洪河电站 5号机扩建工程中爆破震动监测情况。基础开挖爆破区与原厂房最小距离不足 2m ,控制爆破震动至关重要。根据实测振动速度值 ,对监测对象进行了安全评价 ,推断出电站厂房内电器设备的安全临界振速为 3cm/s,并推荐了该类电站的震动安全控制标准。

STUDY AND APPLICATION OF BLASTING TECHNOLOGY WITH FIELD-MIXED EMULSION EXPLOSIVE AND UNCOUPLING CHARGE

In the excavation of temporary and permanent lock chambers in Three Gorge Project,a pumpable emulsion explosive,suitable to be made by use of a portable plant in field,was specially developed so as to meet the needs of buffer blasting at a high slope and protective layer blasting on a foundationBy integration of the explosive with an in hole PVC tube with a certain diameter,the uncoupled charge in a small diameter hole could be reachedWhen loading by a field mixed truck,the explosive could be directly pumped into a hole or tube in the holeIn this paper,the development of the emulsion explosive with a small diameter sensitivity was outlined and the application of the blasting technology with the field mixed explosive and uncoupled charge in various excavation projects was introducedAnd the techno economical evaluation of engineering application was carried out for application of this technology