OVERVIEW OF THE DATABASE OF INSTRUMENTAL STRESS MONITORING ON THE ROCK MASS OF THE TASHTAGOL DEPOSIT

Abstract

The review of the available database on stress evaluation in the rock mass of the Tashtagol deposit, Russia, taken by methods of face loading-out, central-well coring loading-out, partial loading-out, and borehole-wall hydraulic fracturing techniques,
is made. Reference tests were performed at eight mine levels at stope areas and at untouched rock mass as well. The in-situ stress values
₁=_max= 3γH ; ₁=_ср.=1,8γН; ₃=_min=γH
are instrumentally established beyond stoping areas at depth of 890 m; the maximum stress component is directed North West, i.e. along orebody strike (А=320-356°). The requirement to pursue the follow-on series of experiments to monitor force field parameters in the deposit area, Altai-Sayan region, after large-scale earthquakes of 1988 and 2003 periods.