A rock mass strength concept for coal seams incorporating the effect of time

A concept for coal seam strength is proposed based on quantification of the coal seam structure using the RMR system. A strength criterion is developed for use with the numerical approach to design, supplementing empirical strength formulations of the strength formulas currently used in pillar design. A number of approaches are presented for incorporating the effect of time in pillar design. Un model de renforcement de la structure dans le gisement de houille est proposé dans le present article. Le concept dérive de la méthode de quantification utilisant le system de RMR. Un critère de solidité incluant l’utilisation d’une approche numérique au developement du projet est envisagé. De par, fournissant des…