The influence of normal fault on initial state of stress in rock mass

• Autorzy: Tajduś A. , Cała M. , Tajduś K.

Identyfikatory

DOI

10.1515/sgem-2016-0012

• Języki publikacji: EN

Abstrakty

EN

Determination of original state of stress in rock mass is a very difficult task for rock mechanics. Yet, original state of stress in rock mass has fundamental influence on secondary state of stress, which occurs in the vicinity of mining headings. This, in turn, is the cause of the occurrence of a number of mining hazards, i.e., seismic events, rock bursts, gas and rock outbursts, falls of roof. From experience, it is known that original state of stress depends a lot on tectonic disturbances, i.e., faults and folds. In the area of faults, a great number of seismic events occur, often of high energies. These seismic events, in many cases, are the cause of rock bursts and damage to the constructions located inside the rock mass and on the surface of the ground. To estimate the influence of fault existence on the disturbance of original state of stress in rock mass, numerical calculations were done by means of Finite Element Method. In the calculations, it was tried to determine the influence of different factors on state of stress, which occurs in the vicinity of a normal fault, i.e., the influence of normal fault inclination, deformability of rock mass, values of friction coefficient on the fault contact. Critical value of friction coefficient was also determined, when mutual dislocation of rock mass part separated by a fault is impossible. The obtained results enabled formulation of a number of conclusions, which are important in the context of seismic events and rock bursts in the area of faults.

Słowa kluczowe

EN

underground mining; stress field; tectonic disturbances; fault; rock burst; seismic events

• Wydawca: De Gruyter
• Czasopismo: Studia Geotechnica et Mechanica
• Rocznik: 2016
• Tom: Vol. 38, nr 1
• Strony: 109--120
• Opis fizyczny: Bibliogr. 12 poz., tab., rys.

Twórcy

autor

Tajduś A.

• AGH University of Science and Technology in Cracow, Poland

autor

Cała M.

• AGH University of Science and Technology in Cracow, Poland

autor

Tajduś K.

• Strata Mechanics Research Institute, Polish Academy of Sciences in Cracow, Poland

Bibliografia

• [1] Byerlee J., Friction of Rocks, Birkhauser Verlag, Pageoph., 1978, Vol. 116, 615–626.
• [2] Barton N.R., Review of a new shear strength criterion for rock joints, Engng. Geol., 1973, 7, 287–332.
• [3] Barton N.R., The shear strength of rock and rock joints, Int. J. Rock Mech. Min. Sci. & Geomech. Abstr., 1976, 13, 1–24.
• [4] Barton N.R., Choubey V., The shear strength of rock joints in theory and practice, Rock Mech. 1977, 10, 1–54.
• [5] Jaeger J.C., Cook M.G.W., Fundamentals of Rock Mechanics, London 1969.
• [6] Lane K.S., Heck W.J., Triaxal testing for strength of rock joints, Proc. 6th Symp. Rock Mech. Rolla, 1964, 98–108.
• [7] Flisiak J., Tajduś A., Cała M., Flisiak D., Geomechaniczne zjawiska wywołane eksploatacją w górotworze zaburzonym tektonicznie, (Geomechanical phenomena due to mining excavation in tectonically engaged rock mass), Scientific project No. 9T12A01112, (in Polish, unpublished).
• [8] Tajduś A., Flisiak J., Cała M., Wpływ pierwotnego stanu naprężenia w górotworze na zagrożenia tąpaniami, (Interaction of initial stress field with rockburst hazard), Materiały konferencji Tąpania 2004, Ustroń–Katowice, 2004, 325–356.
• [9] Tajduś A., Flisiak J., Cała M., (2008–2011): Numeryczna analiza stanu zagrożenia tąpaniami w rejonie zaburzeń tektonicznych, (Numerical analyses of rockburst’s hazard in tectonic zones), Scientific project No. N N524 376 234, (in Polish, unpublished).
• [10] Tajduś A., Cieślik J., Tajduś K., Rockburst hazard assessment in bedded rock mass. Laboratory tests of rock samples and numerical calculations, Archives of Mining Science, 2014, Vol. 59, Issue 3, 591–608.
• [11] Goodman R.E., Taylor R.L., Brekke T.L., A model for the mechanics of jointed rock, J. Soil Mech. Foundations Div., 1968, 99, 637–659.
• [12] Nizicki R., Teper L., Przebieg i wykształcenie strefy uskokowej uskoku kłodnickiego w OG KWK Halemba, (Geological origin of Kłodnicki fault zone in OG KWK Halemba), Mat. XXV Symp. Geologia Formacji Węglonośnych Polski, Wyd. AGH, Kraków, 2002, 115–121, (in Polish).

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.