小直径低爆速炸药在隧洞光面爆破开挖中的应用

The Application of Minor-diameter Low-speed Detonator in Smooth Demolition of the Tunnel Blast-excavating

结合青海黑泉二级电站输水隧洞爆破施工实例,分析了小直径低爆速炸药的性能,详细阐述了小直径低爆速炸药在隧洞开挖光面爆破中的具体应用,总结出在隧洞开挖光面爆破中,使用小直径低爆速炸药简单、安全、经济,可以使开挖断面得到控制,避免不良爆破引起的塌方.

By using the examples from the records of blasting process of a water- transferring tunnel in Heiquan 2 - class hydrodynamic - power station of Qinghai province, this paper analyzes the performance of the minor - diameter low- speed detonator in smooth demolition of the tunnel blast - excavating, and dwells on the special application. Then it concludes that in the process of the smooth demolition of the tunnel blast- excavating, using minor- diameter low- speed detonator could control the digging section and avoid the collapse which is caused by bad blasting. It has been proved to be simple, safe and economical.