Rapid excavation method for rock-anchored beam of underground powerhouse

The invention discloses a rapid excavation method for an underground powerhouse rock-anchored beam. The excavation of the underground powerhouse is sequentially divided into first layer excavation, small flat layer excavation, middle groove broaching, rock bench protection layer excavation and rock-...

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Main Authors LI YIXIN, LIANG YUJIA, TIAN ZONGPENG, LONG FANG, ZHAO SHENGXIANG, ZHAO WEI, YANG XIAOSHUANG, WEN YOUCAI, WANG QIANG, DONG SHURONG, CHEN CHIEN-HUA, LIU ZHENGENG
Format Patent
LanguageChinese
English
Published 18.08.2023
Subjects
EARTH DRILLING
EMBANKMENTS
EXCAVATIONS
FIXED CONSTRUCTIONS
FOUNDATIONS
GALLERIES
HYDRAULIC ENGINEERING
LARGE UNDERGROUND CHAMBERS
MINING
SHAFTS
SOIL SHIFTING
TUNNELS
UNDERGROUND OR UNDERWATER STRUCTURES
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Summary:The invention discloses a rapid excavation method for an underground powerhouse rock-anchored beam. The excavation of the underground powerhouse is sequentially divided into first layer excavation, small flat layer excavation, middle groove broaching, rock bench protection layer excavation and rock-anchored beam slope rock bench excavation according to the section. Comprising the steps that after a small flat layer above a rock bench is excavated to an upper straight wall, a buffer crack is formed between a rock bench protection layer rock mass and a middle broaching groove rock mass through presplitting blasting, then upper straight wall smooth blasting drilling, middle broaching groove bench blasting excavation and rock bench protection layer excavation are sequentially carried out, and finally inclined blasting hole drilling is carried out on an inclined rock bench. And smooth blasting is conducted on the upper straight wall and the slope blasting holes simultaneously, and slope rock bench excavation is co
Bibliography:Application Number: CN202310759034