ABSTRACT
The new method of calculation of permeability of the rock mass about longwall excavation is developed. Criteria of creation of zones of high permeability in a roof and the seam floor of the coal seams are established. Existence of methods of calculating the stress state rock mass excavation of Suit2d and Suit3d in total with method of calculation of permeability allow to predict formation of zones of effective degasification in difficult conditions of excavation of suite of seams.
Results of numerical experiments are presented computation strain state of the rock massif and to identification of zones of the increased permeability near the system of productive workings of suites of coal seams.
