Static and dynamic analyses of the stability of mining wastes (Ravaneti) in the Carrara marble area (Apuan Alps, Italy)

• Autorzy: Oreste P. , Soldano S.

Warianty tytułu

PL

Analiza statyczna i dynamiczna stabilności hałd odpadów górniczych w regionie wydobycia marmurów Carrara (Alpy Apuańskie, Italia)

• Języki publikacji: EN

Abstrakty

EN

The problem of the stability of “ravanetos” (debris piles of mining waste material extracted from the Apuan Alps, Italy) is very relevant, because of the consequences a landslide would have on the people and the existing civil infrastructures throughout the territory. In this work, the stability of two ravanetos that can be considered as representative of those in the Carrara area has been studied: the Polvaccio ravaneto, a recent type of debris pile and the Torrione-Tecchione, an old debris pile at present undergoing re-naturalisation. The study using the LEM (Limit Equilibrium Method) in a static and pseudo-static field, has made it possible to first carry out a back-analysis to define the most probable apparent cohesion and friction angle values of the material that makes up the ravanetos. Subsequently, it was possible to determine the intensity of the seismic wave that would be able to lead the two ravanetos to limit stability conditions and to determine the probability of such a seismic wave occurring in the next 50 years. A more accurate analysis, carried out with a numerical method in the dynamic field, of the most critical condition (the Polvaccio ravaneto) has led to more conservative results (higher safety factors) than those obtained with the LEM. This result allows us to reveal how the LEM can be considered a cautionary instrument to judge the stability of debris piles during a seismic event and that the likelihood of a landslide occurring in the two studied representative ravanetos over the next 50 years is very slim.

PL

Zagadnienie stabilności hałd odpadów górniczych w regionie Alp Apuańskich, Italia) jest niezmiernie ważne z uwagi na skutki jakie ewentualne osunięcia gruntu mogłyby mieć dla ludności oraz budowli znajdujących się na tych terenach. W pracy tej rozpatrywano zagadnienie stabilności dwóch hałd odpadów, które uznać można za reprezentatywne dla regionu Carrera: hałda w Polvaccio (hałda nowszego typu) oraz Torrione-Tecchione, stara hałda, obecnie poddawana procesom rekultywacji. W badaniach zastosowano metodę równowagi granicznej (LEM) w polu statycznym i pseudo-statycznym. Metoda ta umożliwia w pierwszym rzędzie przeprowadzenie analizy wstecznej w celu określenia najbardziej prawdopodobnego pozornego kąta kohezji i tarcia dla materiału hałdy. Następnie określono intensywność fali sejsmicznej, w wyniku oddziaływania której hałdy mogłyby utracić stabilność a także obliczono prawdopodobieństwa wystąpienia takiej fali sejsmicznej w ciągu najbliższych 50 lat. Bardziej szczegółowa analiza warunków krytycznych, wykonana przy pomocy metod numerycznych w polu dynamicznym, dała bardziej ostrożne wyniki (wyższe współczynniki bezpieczeństwa) niż te uzyskane przy pomocy metody równowagi granicznej. Wyniki badań sugerują, że metoda równowagi granicznej stanowi ostrożne narzędzie do określania stabilności hałd odpadów w trakcie zjawisk sejsmicznych. Pokazano także, że prawdopodobieństwo wystąpienia osunięcia terenu w przeciągu kolejnych 50 lat w przypadku dwóch rozpatrywanych hałd jest bardzo niewielkie.

Słowa kluczowe

EN

mining waste disposal site; slope stability; safety factor; dynamic analysis; numerical calculation; effect of a seismic event

PL

składowisko odpadów górniczych; stabilność zbocza; współczynnik bezpieczeństwa; analiza dynamiczna; obliczenia numeryczne; skutki zjawisk o charakterze sejsmicznym

• Wydawca: Instytut Mechaniki Górotworu PAN
• Czasopismo: Archives of Mining Sciences
• Rocznik: 2012
• Tom: Vol. 57, no. 3
• Strony: 667--686
• Opis fizyczny: Bibliogr. 36 poz., rys., tab., wykr.

Twórcy

autor

Oreste P.

• DITAG – Politecnico di Torino, Italy

autor

Soldano S.

• DITAG – Politecnico di Torino, Italy

Bibliografia

• Barducci A., Carmignani L., Conti P., Disperati L., Fantozzi P.L., Mancini S., Massa G., Rondinella A., Simoncini D., Vaselli L., 2008. Approccio multidisciplinare per la valorizzazione della risorsa lapidea apuana. Atti del Simposio “Stato del Territorio e delle risorse naturali in Toscana”, Ordine dei Geologi della Toscana, 23-25.10.2008.
• Baroni C., Bruschi G., Ribolini A., 2000. Human-induced hazardous debris flows in Carrara Marble basins (Tuscany, Italy). Earth Surface Processes and Landforms, 25, p. 93-103.
• Baroni C., Bruschi G., Criscuolo A., Ribolini A., 2001. Il rischio geomorfologico indotto dall’attivita estrattiva nei bacini marmiferi apuani (Alpi Apuane, Toscana). Atti della Societa Toscana di Scienze Naturali Residente in Pisa, Memorie, Serie A: Processi Verbali, v. 107, pp. 87-96.
• Baroni C., Bruschi G., Criscuolo A., Mandrone G., Risolini A., 2003. Complete grain-size analyses on debris-flows source area in the Carrara Marble Basins, Apuane Alps, Italy. Proceedings of Third International Conference on “Debris-Flow Hazards Mitigation: Mechanics, Prediction, and Assessment”, Davos, Switzerland, Rickenmann, Chen (Eds), Millpress, Rotterdam, 203, pp. 809-820.
• Blijenberg H.M., 1993. Modelling of debris flows, in Flageollet J.C. (Ed.), “Temporal Occurrence and Forecasting of Landslides in the European Community”, Final Report, European Community, Programme EPOCH, Contrach 90 0025, Part I, 162-189.
• Bourdeau C., Havenith H.B., Fleurisson J.A., Grandjean G., 2004. Numerical Modelling of Seismic Slope Stability. Engineering Geology for Infrastructure Planning in Europe, Springer Berlin / Heidelberg, 671-684, Volume 104.
• Bray J.D., Rathje E.M., Augello A.J., Merry S.M., 1998. Simplified Seismic Design Procedure for Lined Solid-Waste Landfills. Geosynthetics International Journal, Vol. 5, Nos. 1-2, pp. 203-235.
• Brunsden D., 1979. Mass movements, in Embleton C. and Thornes J. (Eds), “Process in Geomorphology”, Edward Arnold, London, 131-186.
• Bruschi G., Criscuolo A., Zanchetta G., 2003. Stratigrafia delle discariche di detrito dei bacini marmiferi di Carrara. I ravaneti antichi di Carbonera, Strinato, Gioia e Scalocchiella. Acta apuana, v. 2, pp. 26-32.
• Cala M., 2007. Convex and concave slope stability analyses with numerical methods. Arch. Min. Sci., Vol. 52, No 1, p. 75-89.
• Charles J.A., Watts K.S., 1980. The influence of confining pressure on the strength of compacted rockfill. Geotechnique, 30(4), 353-367.
• Cheng Y.M., Lansivaara T., Wei W.B., 2007. Two-dimensional slope stability analysis by limit equilibrium and strength reduction methods. Computers and Geotechnics, Vol. 34, Issue 3, p. 137-150.
• Cheng Y.M., Lau C.K., 2008. Slope Stability Analysis and Stabilization. Routledge Ed.
• Coli M., Appelius V., Pini G., 2000. Studi sui ravaneti dei Bacini Marmiferi Industriali del Comune di Carrara: ubicazione, tipologia e consistenza. GEAM, Atti del Convegno “Le cave di pietre ornamentali”, Torino, 28-29/11/2000, 59-63.
• Coli M., Pini G., Piccini L., Mariottoni E., Frosini S., Rossi M.L., Livi V., Appelius V., Carmignani L., Meccheri M., Fantozzi P.L., Sciuto P.F., Bocci M., Antompaoli L., Chiereghin F., Graziosi B., Fornaro M., Lovera E., Bergamasco L., 2002. Studi Conoscitivi sui Bacini Marmiferi Industriali di Carrara: Un Contributo per la gestione Pianificata dell’Attività. GEAM - Geoingeneria Ambientale e Mineraria, v. 24, 104 pages.
• Cortopassi P.F., Daddi M., D’Amato Avanzi G., Giacomo A., Giannecchini R., Lattanzi G., Merlini A., Milano P.F., 2008. Quarry waste and slope instability: preliminary assessment of some controlling factors in the Carrara marble basin (Italy). Italian Journal of Engineering Geology and environment, 99-118.
• Cundall P.A., 1976. Explicit Finite Difference Methods in Geomechanics, in Numerical Methods in Engineering. Proceedings of the EF Conference on Numerical Methods in Geomechanics, (Blacksburg, Virginia, June 1976), Vol. 1, 132-150.
• D’Amato Avanzi G., Verani M., 1998. Valenze ambientali ed economiche dei ravaneti delle Alpi Apuane (Toscana). Memorie della Società Geologica Italiana, v. 53, pp. 489-501.
• Domanska D., Wichur A., 2006. The researches on slope stability evaluation with inclinometric measurements. Arch. Min. Sci., Vol. 51, No 4, p. 503-528.
• Hammouri N.A., Malkawi A.I.H., Yamin M.M.A., 2008. Stability analysis of slopes using the finite element method and limiting equilibrium approach. Bulletin of Engineering Geology and the Environment, Volume 67, Number 4, 471-478.
• Hanlong L., An D., Yang S., 2008. Shear behavior of coarse aggregates for dam construction under varied stress paths. Water Science and Engineering, Vol. 1, No. 1, 63-77.
• Hoek E., Bray J.W., 1981. Rock Slope Engineering. Institute of Mining and Metallurgy, London, 358 p.
• Itasca Consulting Group, Flac Manual, Minneapolis (USA), 1994.
• Kasparyan E.V., 2008. Hierarchic-Block models of rock mass in modern geomechanics. Arch. Min. Sci., Vol. 53, No 3, p. 439-448.
• Kidybinski A., 2010. The role of geo-mechanical modelling in solving problems of safety and effectiveness of mining production. Arch. Min. Sci., Vol. 55, No 2, p. 263-278.
• Krzysztoń D., 2005. The influence of friction force on the post-critical failure of rock samples subjected to triaxial compression. Arch. Min. Sci., Vol. 50, No 4, p. 517-536.
• Krzysztoń D., 2007. Frictional resistance in the post-critical failure of rock samples caused by triaxial compression. Arch. Min. Sci., Vol. 52, No 3, p. 387-408.
• Jie M., Chen C.Y., Zhang J.J., 1999. General stability of two-dimensional slopes based on Sarma’s method. International Journal for Numerical and Analytical Methods in Geomechanics, Volume 23 Issue 5, Pages 413-426.
• Li A.J., Lyamin A.V., Merifield R.S., 2009. Seismic rock slope stability charts based on limit analysis methods. Computers and Geotechnics, Volume 36, Issues 1-2, Pages 135-148.
• Lo Presti D., Fontana T., Marchetti D., 2008. Slope Stability Analysis in Seismic Areas of The Northern Apennines (Italy). AIP Conf. Proc. Seismic Eng. Conference, July 8, 2008, Volume 1020, pp. 525-534.
• National Institute of Geophysics and Vulcanology, Maps of values of the probabilistic distribution of the maximum acceleration of a seismic wave for the next 50 years in Italy (2004), internet site.
• Pham Ha T.V., Fredlund D.G., 2003. The application of dynamic programming to slope stability analysis. Can. Geotech. J., 40: 830-847.
• Plewa F., Sobota J., 2002. Physical and mechanical properties of differently composed mixtures used for a stabilized backfill. Arch. Min. Sci., Vol. 47, No 1, p. 35-49.
• Sarma S.K., 1973. Stability analysis of embankments and slopes. Geotechnique, 23, 423-433.
• Sherard J.L., Woodward R.J., Gizienski S.F., Clevenger W.A., 1963. Earth and Earth-Rock Dams. Wiley, New York.
• Università degli Studi di Siena-Centro di Geotecnologie, Carta Giacimentologica dei Marmi delle Alpi Apuane e sua informatizzazione-Relazione Finale, http://www.marmiapuane.info/Documenti/documents/html/RelazioneMarmi-Web.htm