Skoči na glavni sadržaj

Nafta i Plin, Vol. 46 No. 186. - 187., 2026.

Stručni rad

Determination of Instability Modes and Fracture Mechanics of Hard Thick-Bedded Rocks

Zlatko Briševac orcid id orcid.org/0000-0001-7810-8255 ; Rudarsko-geološko-naftni fakultet

Puni tekst: hrvatski pdf 2.427 Kb

str. 71-74

preuzimanja: 0

citiraj

Preuzmi JATS datoteku

Sažetak

This paper presents the objectives, methodological framework, and expected scientific contribution of the NPOO project “Determination of Instability Modes and Fracture Mechanics of Hard Thick-Bedded Rocks Surrounding Underground Openings” (acronym ONMELS), funded by the European Union Recovery and Resilience Facility. The research focuses on the systematic experimental determination of the physical and mechanical properties of intact rock material and discontinuities, and their integration into analytical and numerical models of rock mass behaviour. Special emphasis is placed on laboratory testing, which forms the basis for reliable interpretation of deformation processes and the development of various instability modes within the zone influenced by underground openings. Laboratory investigations will also be conducted at other mineral deposit sites to ensure broader applicability of the results and to enable comparison of the behaviour of different rock mass types under similar geomechanical conditions. The expected project outcomes will contribute to the development of more reliable calculation methods and safer design of underground openings in hard thick-bedded rock masses.

Ključne riječi

thick-bedded rocks; fracture mechanics; underground openings; rock mass; laboratory testing; stability

Hrčak ID:

349544

URI

https://hrcak.srce.hr/349544

Datum izdavanja:

10.7.2026.

Podaci na drugim jezicima: hrvatski

Posjeta: 0 *

Publication date: 15 July 2026

Volume: 46

Issue: 186. - 187.

Pages: 71-74

DOI:

Article Information (continued)

Categories:

Subject: Stručni rad

Categories:

Subject: Professional Paper

Keywords:

Keyword: debelouslojene stijene

Keyword: mehanika loma

Keyword: podzemne prostorije

Keyword: stijenska masa

Keyword: laboratorijska ispitivanja

Keyword: stabilnost

Keywords:

Keyword: thick-bedded rocks

Keyword: fracture mechanics

Keyword: underground openings

Keyword: rock mass

Keyword: laboratory testing

Keyword: stability

Određivanje oblika nestabilnosti i mehanike loma čvrstih debelouslojenih stijena

Translated Title (en): Determination of Instability Modes and Fracture Mechanics of Hard Thick-Bedded Rocks

[ORCID] Zlatko Briševac[1]

Email: zlatko.brisevac@rgn.unizg.hr

 

Rudarsko-geološko-naftni fakultet Faculty of Mining, Geology and Petroleum Engineering Pierottijeva ul. 6, 10000, Zagreb

[ORCID] Zlatko Briševac[*][1]

 

Rudarsko-geološko-naftni fakultet Faculty of Mining, Geology and Petroleum Engineering Pierottijeva ul. 6, 10000, Zagreb

Author notes:

Correspondence to: [*] Zlatko Briševac, Rudarsko-geološko-naftni fakultet; Pierottijeva ul. 6, 10000, Zagreb zlatko.brisevac@rgn.unizg.hr

Abstract

U radu se predstavljaju ciljevi, metodološki pristup i očekivani znanstveni doprinos NPOO projekta „Određivanje oblika nestabilnosti i mehanike loma čvrstih debelouslojenih stijena oko podzemnih prostorija“ (akronim ONMELS), koji se financira sredstvima Mehanizma za oporavak i otpornost Europske unije. Istraživanje je usmjereno na sustavno eksperimentalno određivanje fizičko-mehaničkih značajki intaktnog stijenskog materijala i diskontinuiteta te na njihovu integraciju u analitičke i numeričke modele ponašanja stijenske mase. Poseban naglasak stavljen je na laboratorijska ispitivanja, koja čine osnovu za pouzdanu interpretaciju deformacijskih procesa i razvoj različitih oblika nestabilnosti u zoni utjecaja podzemnih prostorija. Laboratorijska istraživanja provoditi će se i na drugim ležištima mineralnih sirovina radi osiguravanja šire primjenjivosti rezultata i njihove usporedbe u sličnim geomehaničkim uvjetima. Očekivani rezultati projekta doprinose razvoju pouzdanijih metoda proračuna i sigurnijem projektiranju podzemnih prostorija u čvrstim debelouslojenim stijenama.

Translated Abstract

This paper presents the objectives, methodological framework, and expected scientific contribution of the NPOO project “Determination of Instability Modes and Fracture Mechanics of Hard Thick-Bedded Rocks Surrounding Underground Openings” (acronym ONMELS), funded by the European Union Recovery and Resilience Facility. The research focuses on the systematic experimental determination of the physical and mechanical properties of intact rock material and discontinuities, and their integration into analytical and numerical models of rock mass behaviour. Special emphasis is placed on laboratory testing, which forms the basis for reliable interpretation of deformation processes and the development of various instability modes within the zone influenced by underground openings. Laboratory investigations will also be conducted at other mineral deposit sites to ensure broader applicability of the results and to enable comparison of the behaviour of different rock mass types under similar geomechanical conditions. The expected project outcomes will contribute to the development of more reliable calculation methods and safer design of underground openings in hard thick-bedded rock masses.

Uvod

Stijenska masa predstavlja izuzetno složenu geotehničku sredinu jer uključuje značajke intaktnog stijenskog materijala, diskontinuitete strukturnih elemenata i njihovo zajedničko djelovanje u obliku mase. Prilikom izgradnje podzemnih prostorija, poput rudničkih prostorija, komora i tunela, ponašanje stijenske mase očituje se kroz razvoj deformacija, pojavu različitih oblika nestabilnosti te mehanizme loma (Hoek et al., 1995.; Hoek and Brown, 1997.; Kaiser et al., 2000.; Jing and Hudson, 2002.; Martin et al., 2003.; Diederichs, 2007.). U općem smislu, ponašanje stijenske mase može se opisivati kao kontinuirana, diskontinuirana ili kvazikontinuirana geotehnička sredina. Međutim, u slučaju čvrstih debelouslojenih stijena (slika 1) često se javlja složeno ponašanje koje nije moguće u potpunosti opisati klasičnim pristupima mehanike kontinuuma ili diskontinuuma (Zhu and Zhao, 2004.). Stoga je potrebno sustavno istraživanje koje povezuje laboratorijska ispitivanja, terenska mjerenja te analitičke i numeričke metode (Hoek et al., 1995.; Hoek and Brown, 1997.; Wiles, 2006.). Dosadašnja istraživanja uglavnom su bila usmjerena na diskontinuirane stijenske mase kod kojih su dimenzije podzemnih prostorija znatno veće od razmaka diskontinuiteta (Bewick, 2021.). Takav pristup ne daje uvijek zadovoljavajuće rezultate u slučaju čvrstih debelouslojenih stijena, gdje značajke intaktnog materijala imaju izražen utjecaj na ukupno ponašanje sustava stijenska masa – podzemna prostorija (Martin et al., 2003.; Diederichs, 2007.).

Metode

Metode korištene u izradi rada.

Rezultati

Tekst rezultata

Rasprava

Tekst

Appendix/Dodatak -->

References

1. 

BAKUN-MAZOR D.; ; HATZOR Y.H.; ; DERSHOWITZ W.S. , authors. 2009.Modeling mechanical layering effects on stability of underground openings in jointed sedimentary rocks. International Journal of Rock Mechanics and Mining Sciences. https://doi.org/10.1016/j.ijrmms.2008.04.001(46):262–271

2. 

BEWICK R.P. , author. 2021.The Strength of Massive to Moderately Jointed Rock and its Application to Cave Mining. Rock Mechanics and Rock Engineering. https://doi.org/10.1007/s00603-021-02466-3?urlappend=%3Futm_source%3Dresearchgate.net%26utm_medium%3Darticle54(8):3629–3661

3. 

BRIŠEVAC Z.; ; HRŽENJAK P.; ; COTMAN I. , authors. 2017.Estimate of Uniaxial Compressive Strength and Young's Modulus of the Elasticity of Natural Stone Giallo d’Istria. Konicek, Soucek and Konecny (eds.), Eurock, Ostrava. https://doi.org/10.1016/j.proeng.2017.05.201(191):431–441

4. 

DIEDERICHS M.S. , author. 2007.The 2003 Canadian geotechnical colloquium: Mechanistic interpretation and practical application of damage and spalling prediction criteria for deep tunnelling. Canadian Geotechnical Journal. https://doi.org/10.1139/T07-033?urlappend=%3Futm_source%3Dresearchgate.net%26utm_medium%3Darticle44(9):1082–1116

5. 

EXADAKTYLOS G.; ; TSOUVALA S.; ; LIOLIOS P.; ; BARAKOS G. , authors. 2007.A three-dimensional model of an underground excavation and comparison with in situ measurements. International Journal for Numerical and Analytical Methods in Geomechanics. https://doi.org/10.1002/nag.587(31):411–433

6. 

HOEK E.; ; BROWN E.T. , authors. 1997.Practical estimates of rock mass strength. International Journal of Rock Mechanics and Mining Sciences. https://doi.org/10.1016/S1365-1609(97)80069-X34(8):1165–1186

7. 

HOEK E.; ; KAISER P.K.; ; BAWDEN W.F. , authors. 1995.Support of underground excavations in hard rock. Rotterdam: A. A. Balkema. ():

8. 

HRŽENJAK P.; ; DOBRILOVIĆ L.; ; NAVRATIL D.; ; KOVAČEVIĆ ZELIĆ B. , authors. 2023.Shear strength determination of very rough and partially filled extension fractures in thick-bedded and karstified limestones. 15th ISRM Congress 2023 and 72nd Geomechanics Colloquium, Salzburg, Austria. ():

9. 

HRŽENJAK P.; ; JAGULJNJAK LAZAREVIĆ A.; ; TOPIĆ Z.; ; COTMAN I. , authors. 2013.Development and application of in situ flexural strength testing method. 23rd World Mining Congress and Expo 2013 Proceedings, Montreal. ():

10. 

JING L.; ; HUDSON J.A. , authors. 2002.Numerical methods in rock mechanics. International Journal of Rock Mechanics and Mining Sciences. https://doi.org/10.1016/S1365-1609(02)00065-539(4):409–427

11. 

KAISER P.K.; ; DIEDERICHS M.S.; ; MARTIN C.D.; ; SHARP J. , authors. 2000.Underground works in hard rock tunnelling and mining. GeoEng 2000. ():

12. 

KUN M. , author. 2014.Evaluation and applications of empirical approaches and numerical modelling of an underground limestone quarry with room and pillar design. Journal of Mining Science. https://doi.org/10.1134/S106273911401018950(1):126–136

13. 

MALIŠ T.; ; HRŽENJAK P.; ; JAGULJNJAK LAZAREVIĆ A.; ; MIKULEC M. , authors. 2023.Application of the SAP2000 computer programme in the modelling of an underground quarry of dimension stone. Rudarsko-geološko-naftni zbornik. https://doi.org/10.17794/rgn.2023.4.238(4):19–25

14. 

MARTIN C.D.; ; KAISER P.K.; ; CHRISTIANSSON R. , authors. 2003.Stress, instability and design of underground excavations. International Journal of Rock Mechanics and Mining Sciences. https://doi.org/10.1016/S1365-1609(03)00110-2(40):1027–1047

15. 

SEGALINI A.; ; D'ATTOLI M.; ; FERRERO A.M.; ; MIGLIAZZA M. , authors. 2006.Stability analysis of fractured rock mass excavation in ornamental stone quarries by means of 3D numerical modelling. ARMA: 41st U.S. Rock Mechanics Symposium (USRMS): 50 Years of Rock Mechanics – Landmarks and Future Challenges, Golden, Colorado, USA, Proceedings. https://doi.org/10.1016/J.COMPGEO.2010.01.007():121–128

16. 

WILES T.D. , author. 2006.Reliability of numerical modelling predictions. International Journal of Rock Mechanics and Mining Sciences. https://doi.org/10.1016/j.ijrmms.2005.08.00143(3):454–472

17. 

ZHU W.C.; ; ZHAO J. , authors. 2004.Stability analysis of jointed rock mass in large underground caverns based on multi-scale analysis method. International Journal of Rock Mechanics and Mining Sciences. https://doi.org/10.1016/j.trgeo.2023.10110941(3):477–484

This display is generated from NISO JATS XML with jats-html.xsl. The XSLT engine is libxslt.