Study on the anchorage mechanism and roof stability control technology of bolts in fractured or weak surrounding rock DOI Creative Commons
Jiyu Wang, Xigui Zheng, Xiaowei Guo

et al.

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: May 7, 2024

Abstract The effect of bolt support in mining roadways with fractured or weak surrounding rock is poor, and the roof easily loses stability. Studying control technology bolts on necessary. Based theories pressure arches combined arch support, anchorage angle are proposed a model established, optimal calculated. influence related factors scope action analysed via numerical simulation experimental methods. pretightening force spacing between rows positively correlated negatively anchorage, respectively. compression zone conforms to reinforced state when end anchored. work shows that maximum anchor rods length L satisfy 4.28a < 2L 5a. discussed, concept fall prevention an increasing constant force, high surface strength reasonable density as core principles proposed. A field test Youzhong Coal Mine corresponding good this provides new method for rock.

Language: Английский

Study on the anchorage mechanism and roof stability control technology of bolts in fractured or weak surrounding rock DOI Creative Commons
Jiyu Wang, Xigui Zheng, Xiaowei Guo

et al.

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: Oct. 2, 2024

Language: Английский

Citations

1
Impact of excavation footage on vertical shaft lining deformation and surrounding rock stress in Xiyu conglomerate DOI Creative Commons
Hao Wu, Jin Jin, Kaiqiang Geng

et al.

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: Oct. 27, 2024

The Xiyu conglomerate, which is extensively distributed in Xinjiang, China, presents challenges for vertical shaft construction owing to its poor cementation and low strength. selection of an appropriate footage length paramount ensuring safe construction. Based on the pipeline project Xinlongkou Hydropower Station Kuitun River, this study investigated impact stability shafts within conglomerate strata using finite element simulation measurement data analyze lining displacement change stress surrounding rock. results show that excavation has little effect lining's horizontal during excavation. A mathematical model was developed describe how varies with depth. Below a critical threshold, rock cannot be effectively alleviated, leading concentration stress; above excessively large increases load factors such as economic benefits, speed, safety, 4 m judged appropriate.

Language: Английский

Citations

1
Study on the anchorage mechanism and roof stability control technology of bolts in fractured or weak surrounding rock DOI Creative Commons
Jiyu Wang, Xigui Zheng, Xiaowei Guo

et al.

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: May 7, 2024

Abstract The effect of bolt support in mining roadways with fractured or weak surrounding rock is poor, and the roof easily loses stability. Studying control technology bolts on necessary. Based theories pressure arches combined arch support, anchorage angle are proposed a model established, optimal calculated. influence related factors scope action analysed via numerical simulation experimental methods. pretightening force spacing between rows positively correlated negatively anchorage, respectively. compression zone conforms to reinforced state when end anchored. work shows that maximum anchor rods length L satisfy 4.28a < 2L 5a. discussed, concept fall prevention an increasing constant force, high surface strength reasonable density as core principles proposed. A field test Youzhong Coal Mine corresponding good this provides new method for rock.

Language: Английский

Citations

0