GeoStabilization International® - Mining Technology | Mining News .GeoStabilization International® (GSI®) is a geotechnical contracting firm servicing the US and Canada. GSI repairs a full spectrum of mining geotechnical.gsi mining systems,Some pitfalls and misuses of rock mass classification systems for .Among the systems most widely used for mining-related design work are the NGI . 1976) and, more recently, the GSI system (Hoek et al., 1998). Classifying the.
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