Abstract
Abstract This article includes the mathematical foundations of a proposed geometrical model describing the rock, and shows how the geometrical properties of the rock mass can be evaluated. The base for evaluating the parameters describing the rock mass can be a continuous recording of the flow and pressure for a grout hole during a grouting session. Recorded data are then fitted to a mathematical function that describes the flow in the geometrical model. A rough estimation of the geometrical properties can also be done from the volume of injected grout, combined with ordinary water pressure tests. The evaluated geometry can be used to classify the rock.
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