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open rockplug blasting
expl.
岩塞敞开爆破
不在隧洞中设堵塞段,爆破时隧洞中闸门开启,让爆破后的水石流直接冲出洞外。其主要优点是节省了临时堵塞段的工作量和在爆破时不产生井喷,但对隧洞产生磨损,并要求闸门能在爆破后及时投人运用,以控制水流。采用泄渣爆破方式一般是敞开爆破
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