METHOD FOR DEVELOPMENT OF SERIES OF CONTIGUOUS COAL BEDS Russian patent published in 2013 - IPC E21F7/00 E21C41/18 

FIELD: mining.

SUBSTANCE: method consists in identification of a length of active gas release zones, preparation of extraction pillars by tunnelling and strengthening mines in the rock massif, mining of extraction pillars and removal of methane in degassing wells. At the same time the length of active gas release zones is defined by variation of volume deformations of rock massif. At the same time the values of volume deformations of rock massif are produced by numerical methods on the basis of analysis of components of deformation and stress tensors with account of the time factor. The tensor characteristic is gas permeability of rocks under conditions of their natural occurrence. Medium values of rock massif gas permeability are assessed by the given mathematical expression. After determination of length of active gas release zones, with account of produced data, schemes of well drilling, their diameter and number are selected.

EFFECT: increased efficiency of methane removal, higher load at a working face and increased safety of clearing works by gas factor.

6 dwg