Abstract:To study the seismic response of underground structures, it is of great value to investigate their performance induced by seismic events. This paper reviews the correlation of ground motion parameters and seismic damage of underground structures, so that the influence of such seismic factors as the peak ground acceleration, peak ground velocity, earthquake magnitude, duration and frequency on the seismic damage of underground structures can be well explained.
Grew up to solve the deep buried tunnels in the process of large diameter TBM excavation overexcavation problems and obstacles in a complex geological environment problems such as TBM, through the combination of drilling and blasting method and TBM at home and abroad were elaborated the expansion digging method of construction application, show that the drilling and blasting method and TBM method combined with the construction to prevent deep grew up section tunnel overbreak problems and improve resource utilization and avoid TBM card machine under complicated geological problems effectively.
Faults destroy the continuity and integrity of rock strata and change the transfer law of geostress near them. The deformation mechanism of surrounding rocks in a floor roadway of mines is difficult to analyze due to the existence of faults. In this study, a −590 m horizontal surface roadway of Luling Mine in China was used as the study area to investigate the influences of fault on geostress transmission and determine the effects in controlling the deformation of surrounding rocks in a floor roadway of mines. Some measuring points of surrounding rock deformation were set in the horizontal surface at 20 m below the floor and three roadways (Roadways 1, 2, and 3) at 35 m below the floor to analyze the transfer law of mining-induced stress and stress changes and the displacement failure of surrounding rocks through similar material simulation experiment and fiber Bragg grating testing technology. A numerical simulation model was constructed on FLAC 3D to verify the stress and plastic failures of surrounding rocks. Results demonstrate that the pressure relief and stress concentration in the gob approach the fault, and a stress turning point occurs at the fault with the advancement of the working face. Mining-induced stress runs through the fault, and a stress concentration zone with a certain size is formed at the footwall and hanging wall of the fault. The surrounding rock stress in Roadway 3 changes the most, followed by those in Roadways 2 and 1 when the relative distances from the working face to the different roadways are the same. The three roadways develop different degrees of deformation failure, which are manifested in the order of Roadway 3 > Roadway 2 > Roadway 1 when the working face runs through the fault. This finding demonstrates that faults can substantially control the transfer of mining-induced stress at the floor that reduces the stability of roadways. This study provides a real and accurate technological reference to the surrounding rock support in roadways of mines.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.