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Fibre glass reinforced plastics bolt's application in coal wall support of stoping tunnel 被引量:1
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作者 曲光 贾安立 《Journal of Coal Science & Engineering(China)》 2003年第1期82-84,共3页
This article set forth two types of destructive form of stopping tunnel coal wall: destructive form in coal and destructive form in interface of coal layer. In addition, the mechanism of destruction in stopping tunnel... This article set forth two types of destructive form of stopping tunnel coal wall: destructive form in coal and destructive form in interface of coal layer. In addition, the mechanism of destruction in stopping tunnel coal wall is analyzed. 展开更多
关键词 FRP destructive form of coal wall support of coal wall
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Study on the time delay failure characteristics of sandstone unloading under dynamic disturbance
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作者 Huafeng Deng Yening Huang +3 位作者 Yao Xiao Pengfei Xu Jianlin Li Mingyang Wang 《Deep Resources Engineering》 2024年第3期43-56,共14页
The rockburst caused by underground engineering excavation exhibits a significant lag effect.Studies have shown that the occurrence of lag-type rockburst is closely related to the delayed failure of rocks.This paper f... The rockburst caused by underground engineering excavation exhibits a significant lag effect.Studies have shown that the occurrence of lag-type rockburst is closely related to the delayed failure of rocks.This paper focuses on the delayed failure characteristics of unloading-damaged sandstone under the combined action of static load and dynamic disturbance.Numerical simulations are utilized to analyze the delayed failure evolution characteristics and failure mechanisms of sandstone.The results indicate that in triaxial unloading delay failure tests,the duration of loading decreases exponentially with the increase of initial unloading damage.Compared to static load conditions,the duration of loading under dynamic disturbance decreases by more than 43%,and the average strain rate significantly increases.The number of cracks at the endpoint of triaxial unloading delay failure increases as initial unloading damage decreases,with a substantial increase in the number of cracks under dynamic disturbance.These findings provide a valuable reference for the timeliness and delayed rockburst analysis and interpretation of rock damage and failure under high-stress levels. 展开更多
关键词 Time delay Unloading Deformation characteristics destructive form Particle Flow Program
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