Summary

Several risks are connected urth the use of bolts as main support in a roadway. Falls of small blocks from the roof or even- complete collapses of the roadway. A Stability forecast has to to be done in order to avert of any irregular behaviour and to use reinforcement techniques.

The various measuring methods intended to forecast the stability of the roadway and the reinforcement techniques have to suit the various behaviours and different difficulties which may occur.

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