Experimental and numerical study of the uniaxial compressive stress-strain relationship of a rock mass with two parallel joints

• Autorzy: Xiong L. X. , Yuan H. Y. , Zhang Y. , Zhang K. F. , Li J. B.

Identyfikatory

DOI

10.2478/ace-2019-0019

• Języki publikacji: EN

Abstrakty

EN

A “rock bridge”, defined as the closest distance between two joints in a rock mass, is an important feature affecting the jointed rock mass strength. Artificial jointed rock specimens with two parallel joint fractures were tested under uniaxial compression and numerical simulations were carried out to study the effects of the inclination of the rock bridge, the dip angle of the joint, rock bridge length, and the length of joints on the strength of the jointed rock mass. Research results show: (1) When the length of the joint fracture, the length of the rock bridge, and the inclination of the rock bridge stay unchanged, the uniaxial compressive strength of the specimen gradually increases as the inclination of the joint fracture increases from 0° to 90°. (2) When the length of the joint fracture, the length of the rock bridge, and the inclination of the joint fracture stay unchanged, the uniaxial compressive strength of the specimen shows variations in trends with the inclination of the rock bridge increasing from 30° to 150° (3). In the case when the joint is angled from the vertical loading direction, when the dip angle of the joint fracture, the inclination of the rock bridge, and the length of the rock bridge stay unchanged, the uniaxial compressive strength of the specimen gradually decreases with an increasing length of joint fracture. When the dip angle of the joint fracture, the inclination of the rock bridge, and the length of the joint fracture stay unchanged, the uniaxial compressive strength of the specimen does not show a clear trend with an increase of the length of the rock bridge.

Słowa kluczowe

EN

jointed rock mass; parallel joint; peak strength

PL

masa skalna łączona; złącze równoległe; siła szczytowa

• Wydawca: Komitet Inżynierii Lądowej i Wodnej PAN ; Politechnika Warszawska, Wydział Inżynierii Lądowej
• Czasopismo: Archives of Civil Engineering
• Rocznik: 2019
• Tom: Vol. 65, nr 2
• Strony: 67--80
• Opis fizyczny: Bibliogr. 7 poz., il., tab.

Twórcy

autor

Xiong L. X.

• State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, China
• Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai China

autor

Yuan H. Y.

• College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu, China

autor

Zhang Y.

autor

Zhang K. F.

• College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu, China

autor

Li J. B.

• College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu, China

Bibliografia

• 1. D. Huang, D.M. Gu, C. Yang, R.Q. Huang, G.Y. Fu, “Investigation on mechanical behaviors of sandstone with two preexisting flaws under triaxial compression”, Rock Mech Rock Eng 49: 375-399, 2016.
• 2. H.Q. Li, L.N.Y.Wong, “Numerical study on coalescence of pre-existing flaw pairs in rock-like material”, Rock Mech Rock Eng, 47: 2087-2105, 2014.
• 3. J. Zhang, X.P. Zhou, J.Y. Zhu, C. Xian, Y.T. Wang, “Quasi-static fracturing in double-flawed specimens under uniaxial loading the role of strain rate”, Int J Fract, published online, 2018.
• 4. X.P. Zhang, L.N.Y. Wong, “Crack initiation propagation and coalescence in rock-like material containing two flaws a numerical study based on bonded-particle model approach”, Rock Mech Rock Eng, 47: 1001-1021, 2013.
• 5. Y.L. Zhao, L.Y. Zhang, W.J. Wang , C.Z. Pu, W. Wan, J.Z. Tang, “Cracking and stress-strain behavior of rock-like material containing two flaws under uniaxial compression”, Rock Mech Rock Eng, 49: 2665-2687, 2016.
• 6. S.Q. Yang, “Crack coalescence behavior of brittle sandstone samples containing two coplanar fissures in the process of deformation failure”, Engineering Fracture Mechanics, 78: 3059-3081, 2011.
• 7. S.Q. Yang, W.L.Tian, Y.H. Huang, P.G. Ranjith, Y. Ju, “An experimental and numerical study on cracking behavior of brittle sandstone containing two non-coplanar fissures under uniaxial compression”, Rock Mech Rock Eng, 49, 1497-1515, 2016.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).