EVALUATION OF STRUCTURALLY DEFORMED AND ROCK-BUMP ROCK MASSES Russian patent published in 2015 - IPC E21C39/00 

FIELD: mining.

SUBSTANCE: claimed process comprises the erection of gypsum-well observation station in underground working. Gypsum ply, 20-50 cm wide and 0.5-3 cm deep, is applied on working sides, roof and floor, over its cross-section contour. Removal warning devices are secured in gypsum ply by a definite grid. Simultaneously with application of gypsum ply, some 1-2 m therefrom, wells are bored over the working cross-section, in radial directions in depth required for determination of working influence area. Working deformation patter is used to define the direction of the main normal strains σ1 in rock massif. Drilled observation wells are used to define the position of fractures in the massif to get the mapping, that is, a natural display of the well in space. Removal warning devices in gypsum ply are used to define the working convergence. Well mapping results are used to define the direction of the main normal strains and the depth of rock damage are propagation. This allows the determination of working and rock massif deformation mechanism.

EFFECT: higher accuracy.

2 cl, 4 dwg