In-situ stress determination at Ruttan Mine, Sherritt Gordon Mines Ltd.

Abstract This paper describes a methodical approach to the estimation of the orientation and the magnitude of in-situ stresses. The study was performed at the Ruttan Mine, Sherritt Gordon Mines Ltd., a 6,000 T.P.D. underground operation, located in northern Manitoba, Canada. It involves an initial estimate to be made based upon:

structural interpretation
virgin stress measurements conducted in other areas (world wide, regional)

 The verification of the prevailing stress regime was made by conducting CSIRO hollow inclusion'1' overcoring measurements. The current cost for a virgin stress determination is about $7000per measurement'2' and the difficulty encountered in attaining a good reading is high. This paper will describe the analytical procedures employed at Ruttan in evaluating the in-situ stress magnitude and orientation based on three overcore tests. It is proposed to perform an additional six measurements in order to verify the following results:Vertical stress = av (MPa) = 0.027 by depth (m) Major principal stress = al = 2.5 xav (340°/-20°)* Intermediate principal stress = a2 ~ 1.2xov (070°/0°) Minor principal stress = a3 - O.Sxav (160°/-70°)
Keywords: Rock mechanics, In-situ Stresses, Virgin stress measurements, Structural geology, Fractures, Boreholes, Debonding, Overcoring.
Full Access to Technical Paper
PDF version for $20.00
Search
Sort By:  Relevance
Showing results 1 - 7
Text
Publication: CIM Bulletin
Author(s): F.J. MUNN
Keywords: Rock mechanics, Pitwall stability, Wall failures, Coal mining, Wall control, Monitoring, Backfill, Cardinal River Coals Ltd.
Issue: 884
Volume: 78
Year: 1985
Text
Summary: This report describes the development and effective use of shaped charges as part of the Elliot Lake Mine Roof Stability Project to remotely remove the heads from roof bolts. With a slight modification, these same shaped charges are being recommended for use to the Brunswick Mining and Smelting Corporation Limited (Mining Division), to cut steel cable bolts.
Publication: CIM Bulletin
Author(s): E. CONTESTABILE, T.R. CRAIG
Keywords: Rock mechanics, Shaped charges, Roof stability, Cable bolts, Explosives, Support systems, Loading.
Issue: 884
Volume: 78
Year: 1985
Text
Summary: The selection of material comprising a backfill is, of economic necessity, site dependent. Nevertheless, given the existing range of typical components—coarse waste, alluvial sand, tailings— a balanced or optimal choice is no straightforward matter. A new design approach toward deciding what constitutes an optimum combination of backfill material promises to be useful. In particular a 'binder' number, based on the mean distance between aggregate particles, specific surface and...
Publication: CIM Bulletin
Author(s): G. SWAN
Keywords: Rock mechanics, Mine backfill, Backfill design, Mill tailings, Aggregates, Grading, Cement, Compressive strength.
Issue: 884
Volume: 78
Year: 1985
Text
Summary: Competition in the world potash market has increased significantly since the late 1970s. The failure of consumption to grow at expected levels has led to industry over-capacity, a situation which is likely to persist at least until 1990. Individual Saskatchewan producers and their offshore marketing company, Canpotex, have responded to this challenge by increasing mining efficiency, developing more cost-effective and reliable transportation systems and establishing innovative financing and...
Publication: CIM Bulletin
Author(s): DOUGLAS A. KARVONEN
Keywords: Industrial minerals, Potash, Marketing, Domestic market, Offshore market product development, Transportation, Potassium chloride, Fertilizers.
Issue: 884
Volume: 78
Year: 1985
Text
Summary: Equity Silver Mines Limited, Canada's largest silver mine, has designed, built and operated a leach plant to reduce the levels of antimony and arsenic in its silver-gold-copper flotation concentrate. The orebody contained deleterious antimony and arsenic minerals in such proportions that the economic long-term sales contracts necessary to obtain project financing could not be procured. Construction of the leach plant therefore allowed development of the mine to proceed. Although the plant...
Publication: CIM Bulletin
Author(s): C.R. EDWARDS
Keywords: Process development, Filtering, Leaching, Plant design, Process technology, Antimony, Arsenic, Silver.
Issue: 884
Volume: 78
Year: 1985
Text
Summary: A sample of flotation feed from Bakertalc Inc., Highwater, Quebec was subjected to flotation evaluation to improve the recovery of talc. A number of alternative frother/collectors and depressants as well as flotation parameters including pH, conditioning time, frother/collector concentration and pulp density were assessed. In addition, the possibility of using a size coarser than that currently employed for flotation (95% minus 50 /j,m) was investigated.
As far as possible, a laboratory...
Publication: CIM Bulletin
Author(s): P.R.A. ANDREWS
Keywords: Industrial minerals, Talc, Flotation, Recovery, Milling, Grinding, Processing, Frothers, Depressants.
Issue: 884
Volume: 78
Year: 1985
Text
Summary: Falling rock is one of the major causes of serious injuries and deaths in Swedish mines. The research at the Division of Mining and Underground Construction was therefore directed toward controlled blasting in hard intense jointed rock.
The project was started with an extensive literature review. Model tests with a new equivalent model material have been initiated to find ways of improving blasting techniques. The result showed that long cracks arise at the perimeter holes when there is a...
Publication: CIM Bulletin
Author(s): AGNE RUSTAN, TORBJORN NAARTTIJARVI, BENGT LUDVIG
Keywords: Rock mechanics, Controlled blasting, Hard intense jointed rock, Rock stability, ANFO, Explosives, Cutblasting, Blasting, Drilling, Initiation techniques, Vibration measurements.
Issue: 884
Volume: 78
Year: 1985
Powered by Coveo Enterprise Search