Data collection for development of assessment methods of firm roof failure based on mine surveying observations

Abstract

The assessment method of roof failure is based on the interpretation of mine surveying observations depending on the pettern of rock mass. This method conduces to recognize the condition, when a firm roof deformation occurred. If no complete failure of firm overlaying strata occurs, the surroundings of the mined out area is considerably surcharged and the risk of anomalous geo-machanical phenomena substantially increaases.