The primary goal of ground support in mine drifts is to protect mine workers and equipment against rock falls. The results of structural mapping were used to generate 3-D joint networks. By introducing a virtual excavation in the generated rock mass it was possible to identify all wedges that can potentially be defined at the exposed surfaces of the excavation. The number and size of these wedges are controlled by the geometry and orientation of the excavation, as well as the properties of the generated joint sets and individual random joints. Consequently it was possible to determine the stability of every individual wedge along the span of an excavation. The influence of various reinforcement strategies (type of bolts, reinforcement patterns, mesh, etc.) on the stability of an excavation is quantified. This is a prelude to an economic analysis whereby the costs associated with different stabilization techniques are assessed. This methodology is illustrated by means of three case studies in a polymetallic underground mine in the Canadian Shield.


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    Title :

    Drift reinforcement design based on discontinuity network modelling


    Additional title:

    Streckenausbauplanung auf der Grundlage von Kluftnetzmodellierung


    Contributors:


    Publication date :

    2003


    Size :

    13 Seiten, 12 Bilder, 8 Tabellen, 12 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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