Instability mechanism and anchoring control technology of expansive weakly cemented soft rock roadway

• Autorzy: Zhang, Wei
• Języki publikacji: EN

Abstrakty

EN

A long-term discontinuous development of the plastic zone and broken zone of weakly ce- mented surrounding rock is the main reason for instability of the surrounding rock of a roadway. The load-bearing support concept of “allowable deformation + releasable pres- sure + limited deformation” for a weakly cemented soft rock roadway is proposed, and an “allow-release-limit” support structure mechanical model with U-shaped steel as the main body is established. Anchoring control measures of “U-shaped steel + flexible material wall backfill + key parts strengthening” can solve problems of large deformation and long defor- mation duration of weakly cemented roadways.

Słowa kluczowe

EN

weakly cemented soft rock; roadway support; deformation control; expansion; support concept

• Czasopismo: Journal of Theoretical and Applied Mechanics
• Rocznik: 2023
• Tom: Vol. 61 nr 3
• Strony: 465--480
• Opis fizyczny: Bibliogr. 20 poz., rys., tab.

Twórcy

autor

Zhang, Wei

• School of Architecture and Civil Engineering, Liaocheng University, Liaocheng, China,

Bibliografia

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• 12. Wang S., Han L.J., Meng Q.B, Jin Y.H., Zhao W.S., 2020, Water absorption/dehydration by NMR and mechanical response for weakly cemented mudstones subjected to different humidity conditions, Bulletin of Engineering Geology and the Environment, 79, 3, 1275-1288.
• 13. Yang S.Q., Jing H.W., 2011, Strength failure and crack coalescence behavior of brittle sandstone samples containing a single fissure under uniaxial compression, International Journal of Fracture, 168, 2, 227-250.
• 14. Yang S.Q., Yin P.F., Zhang Y.C., Chen M., Zhou X.P., Jing H.W., Zhang Q.Y., 2019, Failure behavior and crack evolution mechanism of a non-persistent jointed rock mass containing a circular hole, International Journal of Rock Mechanics and Mining Sciences, 114, 101-121.
• 15. Zhang C.W., Jin Z.X., Feng G.R., Song X.M., Rui G., Zhang Y.J., 2020, Double peaked stress-strain behavior and progressive failure mechanism of encased coal pillars under uniaxial compression, Rock Mechanics and Rock Engineering, 53, 7, 3253-3266.
• 16. Zhang W., Guo W.Y., Wang Z.Q., 2022a, Influence of lateral pressure on mechanical behavior of different rock types under biaxial compression, Journal of Central South University, 29, 11, 3695-3705.
• 17. Zhang W., Zhao T.B., Guo W.Y., Xing M.L., 2022b, Study on mechanical characteristics of rock type I fracture and anchorage strengthening mechanism, Journal of Theoretical and Applied Mechanics, 60, 3, 423-434.
• 18. Zhang W., Zhao T.B., Yin Y.C., 2022c, Prefabricated fractured rock under stepwise loading and unloading, Journal of Theoretical and Applied Mechanics, 60, 1, 167-179.
• 19. Zhang W., Zhang B.L., Zhao T.B., 2023, Study on the law of failure acoustic-thermal signal of weakly cemented fractured rock with different dip angles, Rock Mechanics and Rock Engineering, DOI: 10.1007/s00603-023-03296-1.
• 20. Zhao T. B., Zhang W., Gu S.T., Lv Y.W., Li Z.H., 2020, Study on fracture mechanics of granite based on digital speckle correlation method, International Journal of Solids and Structures, 193, 192-199.

Identyfikatory

DOI

10.15632/jtam-pl/166276