METHOD OF PREVENTING FLOODING OF POTASH MINE OVER REEF ARRAY Russian patent published in 2018 - IPC E21D11/38 

FIELD: mining.

SUBSTANCE: method involves panel-block preparation of reserves and development of sylvinite beds by system of chambers. Prior to mining, seismic exploration is carried out, the boundary of reef array spreading in the subsalt layer and the sections with dip angle of reef array roof more than 2.5 degrees are determined. Then the mining direction of potassium ores is selected so that temporary and permanent boundaries for development of beds together with their alignment of selected sections on the plan are sub perpendicular along the strike of the boundaries of the reef array. In the case of alignment of the development boundaries with reef array sections with roof dip angle more than 2.5 degrees with the non-perpendicular position of mining boundaries and the boundaries of reef array, and in case of stretching deformations in the water-protective layer due to their increase towards rood dip of the reef array, the limits of areas of inactive mining operations are advanced from the boundaries of the reef array by carrying on the development and transferring the area of stretching deformations to compression state.

EFFECT: prevention of extreme situations at potassium mine.

1 cl