银江水电站右岸高陡边坡控制爆破技术  

Controlled blasting technology for high and steep slope on the right bank of Yinjiang hydropower station

作　　者：雷晓军 马元军 李斌 余伟 游泳 LEI Xiao-jun;MA Yuan-jun;LI Bin;YU Wei;YOU Yong(Gezhouba Explosive Sichuan Blasting Engineering Co.,Ltd.,Panzhihua Branch,Panzhihua 617000,Sichuan,China)

机构地区：[1]葛洲坝易普力四川爆破工程有限公司攀枝花分公司,四川攀枝花617000

出　　处：《工程爆破》2024年第2期73-77,共5页Engineering Blasting

基　　金：攀枝花市科技计划项目(2021CY-S-1)。

摘　　要：为减小边坡开挖过程爆破振动对永久边坡及临近建(构)筑物结构稳定性的影响,同时提高爆破施工效率,针对银江水电站右岸高陡边坡复杂的施工环境,基于精细控制爆破技术,利用数码电子雷管精确延时的特性,对边坡主爆孔及预裂爆孔孔径、炸药类型、装药结构、延时时间等进行精确设计,并采用爆破振动测试仪对边坡振动速度进行监测验证。结果显示:主爆区采用直径Φ110 mm炮孔,Φ70 mm二号岩石乳化炸药连续耦合装药,孔间炮孔延时时间17 ms,排间炮孔延时60 ms,逐孔起爆,预裂爆区采用直径Φ90 mm炮孔,Φ32 mm二号岩石乳化炸药间隔装药,严格控制施工质量,爆破效果较好,临近爆区永久边坡最大振动速度为7.3 cm/s,永久边坡预裂爆破半孔率超过90%,实现了连续、安全、高效的爆破施工作业。In order to reduce the impact of blasting vibration during slope excavation on the stability of permanent slopes and adjacent building structures,and to improve blasting efficiency,based on the complex construction environment of the high and steep slope on the right bank of the Yinjiang hydropower station,using precision control blasting technology and the precise delay time characteristics of digital electronic detonators,the borehole diameter,explosive type,charging construction,delay time of primary blasting holes and pre-split blasting holes were precisely designed,at the same time,the resulting blasting vibration velocity was monitored.The results show that the primary blasting zone drilled blast holes with a diameter of 110 mm,charged No.2 rock emulsion explosive with a diameter of 70 mm continuously,with a delay time of 17 ms between boreholes and 60 ms between row boreholes,detonating hole by hole,and pre-split blasting zone drilled blast holes with a diameter of 90 mm,charged No.2 rock emulsion explosive with a diameter of 32 mm intermittently.The effectiveness was satisfactory,and the maximum blasting vibration speed of the permanent slope near the blasting area was 7.3 cm/s.The half hole rate of the permanent slope pre-splitting blasting exceeded 90%,achieving continuous,safe and efficient blasting construction operations.

关 键 词：水电站 高陡边坡 减振 控制爆破 

分 类 号：TD235[矿业工程—矿井建设]