Prediction of Geodynamic Phenomena during Mine Development nearby Faulting at Ore Deposits in Gornaya Shoria
V. M. Seryakov, A. A. Eremenko
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: gornaya shoria, ore deposits, faulting, heading, stresses, fault slope angle, mathematical modeling, roadway-to-fault distance
Abstract
The accomplished review of the geological and geomechanical conditions at the Tashtagol and Sheregesh deposits shows that the operating mine fields contain small- and medium-amplitude fractures, faults, dikes and ore-rock interfaces. It is revealed that during heading and stoping, geodynamic phenomena arise mostly in the neighborhood of these planes of weakness. The mathematical modeling was used for the stress-strain analysis of rock mass at different slope angles of faults approached by the development headings. It is found that in case of a fault 1 to 3 m wide, the shear of the fault edges along the fault plane at the fault slope angle of 65° can happen when an approaching roadway is at a distance not less than 10 m, at the slope angle of 45°-at a distance not less than 20 m and at the slope angle of 15°-at a distance not less than 40 m. For the faults 5 to 10 m wide, at the fault slope angle of 65°, no shearing takes place, at the slope angle of 45°, shearing can happen when a roadway approaches the fault at a distance not less than 5 m and at the slope angle of 15°-not less than 30 m.
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