STRESS STATE MODELING OF COAXIAL THREE-LEVEL OPEN STOPING IN MAP3D

The article describes the research results of stress state modeling in the geotechnical system composed of an underground mine and adjacent rock mass in Map3D in case of coaxial concurrent stoping on three mine levels. The rock mass quality rating (by Barton) is determined for the methods of mining with shearing and drilling-and-blasting. The numerical model is calibrated using the data of actual in-situ rock mass mapping and outcomes of Dips and RocData software. Feasibility of concurrent stage-by-stage stoping with rib pillars on three mine levels is sufficiently accurately determined at the mine planning and design stage by numerical modeling of stress state in the rock mass-and-mine system in Map3D. The determined Q-index of rock mass (by Barton) under shearing and drilling-and-blasting is used in calibration of the developed numerical model together with the data of in-situ rock mass mapping and outcomes of software Dips and RocData. The proposed approach is recommended for the geotechnical assessment of rock mass subjected to mining using different methods—with artificial and natural support of mined-out stopes, as well as with caving. Under difficult ground conditions, higher rock pressure, rush of water and high-density jointing, the model is calibrated based on the data of geotechnical assessment and then is refined using Rocscience software—Dips and RocData.

Keywords

Stoping, numerical modeling, rock mass quality rating, Q-index, Barton’s system, room, level, horizon, rib pillar—RP.

Issue number: 11
Year: 2018
ISBN:
UDK: 622.272
DOI: 10.25018/0236-1493-2018-11-0-5-17
Authors: Eremenko V. A.

About authors: Eremenko V.A., Doctor of Technical Sciences, Professor of Russian Academy of Sciences, Director of the Research Center «Application of Geomechanics and Mining of Convergent Technologies», Mining Institute, National University of Science and Technology «MISiS», 119049, Moscow, Russia, e-mail: prof.eremenko@gmail.com.

REFERENCES:

1. Mery okhrany shakhty ot zatopleniya i ob"ektov na zemnoy poverkhnosti ot vrednogo vliyaniya gornykh rabot [Mine flood prevention and protection of ground surface objects from impact of mining], Perm, Galurgiya, 2007, 85 p.

2. Sytnik E. V., Zlebova A. E. Prognoznaya otsenka vliyaniya razrabotki mestorozhdeniy kaliynykh soley na sostoyanie poverkhnostnykh i podzemnykh vod [Predictive estimate of influence of potash salt mining on surface and ground water], Gornyy zhurnal. 2014, no 2, pp. 97—101. [In Russ].

3. Protosenya A. G., Verbilo P. E. Otsenka prochnosti blochnogo massiva metodom chislennogo modelirovaniya [Strength assessment of jointed rock mass by numerical modeling]. Izvestiya vysshikh uchebnykh zavedeniy. Gornyy zhurnal. 2016, no 4, pp. 47—54. [In Russ].

4. Ermashov A. O. Chislennoe modelirovanie deformirovaniya i razrusheniya obraztsov solyanykh porod [Numerical modeling of deformation and failure of salt rock specimens]. Izvestiya vysshikh uchebnykh zavedeniy. Gornyy zhurnal. 2014, no 7, pp. 74—81. [In Russ].

5. Zakharov V. N., Eremenko V. A., Fedorov E. V., Lagutin D. V. Geomekhanicheskoe obespechenie proektirovaniya otrabotki zapasov kamennoy soli na Iletskom mestorozhdenii [Geomechanical support of salt rock mine planning and design at the Ilets deposit], Gornyy zhurnal. 2018, no 2, pp. 41—47. [In Russ].

6. Map3D. Available at: http://www.vap3d.com/

7. Rocscience. Available at: https://www.rocscience.com/

8. Barton N., Lien R., Lunde J. Engineering classification of rock massec for the design of tunnel support, Rock Mechanics, 1974, 6(4): pp. 183—236.

9. Barton N. Application of Q-System and Index Tests to Estimate Shear Strength and Deformability of Rock Masses. Workshop on Norwegian Method of Tunneling. New Delhi, 1993. pp. 66—84.

10. Laubscher D. H. A geomechanics classification system for the rating of rock mass in mine design. Trans. S. Afr. Inst. Min. Metal., 9(10). 1990.

11. Terzaghi K., Peck R. B. Soil mechanics in engineering practice. Wiley, New York. 1967.

12. Eremenko V. A., Aynbinder I. I., Patskevich P. G., Babkin E. A. Otsenka sostoyaniya massiva gornykh porod na rudnikakh ZF OAO «GMK «Noril'skiy nikel'» [Rock mass assessment in mines of NorNickel’s Polar Division], Gornyy informatsionno-analiticheskiy byulleten’. 2017, no 1, pp. 5—17.

13. Lushnikov V. N., Sendi M. P., Eremenko V. A., Kovalenko A. A., Ivanov I. A. Metodika opredeleniya zony rasprostraneniya povrezhdeniya porodnogo massiva vokrug gornykh vyrabotok i kamer s pomoshch'yu chislennogo modelirovaniya [Numerical modeling procedure to determine damaged zones in rock mass around stopes], Gornyy zhurnal. 2013, no 12, pp. 11—16. [In Russ].

14. Kozyrev A. A., Semenov I. E., Zemtsovskiy A. V. Opredelenie bezopasnykh parametrov pripoverkhnostnogo tselika pri podzemnoy vyemke zapasov perspektivnogo mestorozhdeniya Partomchorr v KHibinskom massive [Safe parameters of near-surface pillar in underground extraction of promising reserves of the Partomchorr deposit in the Khibiny Massif], Gornyy informatsionno-analiticheskiy byulleten’. 2013, no 5, pp. 30—39. [In Russ].

15. Eremenko V. A. Kursy podgotovki geomekhanikov (geotekhnikov), geologov i gornykh inzhenerov po programmam Map3D i Rocscience (Dips, RocData, Unwedge) [Training courses for geomechanics (geotechnical engineers), geologists and mining engineering on Map3S and Rocscience (Dips, RocData, Unwedge) software suites], Gornyy zhurnal. 2018, no 2, 2 p. [In Russ].

16. Bahrani N., Hadjigeorgiou J. Influence of Stope Excavation on Drift Convergence and Support Behavior: Insights from 3D Continuum and Discontinuum Models. Rock Mechanics and Rock Engineering. 2018. pp. 1—19.

17. Paul A., Murthy V. M. S. R., Prakash A., Singh A. K. Estimation of rock load in development workings of underground coal mines. A modified RMR approach. Current Science, 114(10), 2018. pp. 2167—2174.

18. Souley M., Renaud V., Al Heib M., Lahaie F., Nyström A. Numerical investigation of the development of the excavation damaged zone around a deep polymetallic ore mine. International Journal of Rock Mechanics and Mining Sciences, 106, 2018. pp. 165—175&

19. Cheng G., Chen C., Li L., Dai F., Ren B. Numerical modelling of strata movement at footwall induced by underground mining. International Journal of Rock Mechanics and Mining Sciences, 108, 2018. pp. 142—156.

Our partners

Подписка на рассылку

Раз в месяц Вы будете получать информацию о новом номере журнала, новых книгах издательства, а также о конференциях, форумах и других профессиональных мероприятиях.