复杂地质条件下危岩的爆破排险

BLASTING OBVIATING OF DANGEROUS CLIFF UNDER COMPLICATED GEOLOGICAL CONDITION

介绍在复杂地质结构条件下,应用控制爆破技术对雨城电站库区岸边巨型危崖排险作业。为了施工的安全,采用光面爆破技术、合理确定爆破参数,采用非电导爆管微差起爆网路、严格控制一次起爆药量减小对危岩振动,分析了大量石方落入水域产生的涌浪危害程度及涌浪到岸边爬升的计算方法,并有针对性地采用安全防范措施。此工程经验对类似地质灾害及水电站库区危崖的处理具有指导意义。

The paper introduced the danger relieving of the precipitous dangerous cliff in the area of reservoir at Yucheng power station by the use of the technology of controlled blasting under complicated geology condition. For the consideration of safety smooth blasting technique was adopted under reasonable blasting parameters. The blasting was detonated by non-electric fuse with millisecond igniting network. The quantity of igniting explosive was strictly limited so as to reduce the resulting vibration of the dangerous rock. The danger of wave surge resulted ＇from stone＇s falling in large amount into the water area and the method of calculation of wave surge＇s rising to river bank was analyzed,and protection measures were taken. The presented blasting is of reference value to the similar engineering.