Semi-empirical method for calculation of maximum subsidence in coal mines

Most empirical methods of subsidence prediction are based on the prior knowledge of the maximum possible subsidence, Smax, for a particular coalfield. The subsidence profile and other associated parameters along a desired line may be derived, in most cases, as a function of Smax. These methods are site specific and are not based upon the rational concepts of mechanics. Purely mechanistic methods, on the other hand, could not find wide application because of their limitations in representing the complex behaviour of a rockmass.