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.

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