COMPOUND DEVELOPMENT METHOD OF SERIES OF GENTLY SLOPING BEDS OF SYNCLINE AND BRACHYSYNCLINE MINE FIELDS Russian patent published in 2011 - IPC E21C41/00 

FIELD: mining.

SUBSTANCE: method involves drilling and preparation of series of beds with two working trenches, which are knocked down with twin underground mine openings driven via beds through lower points of basins of synclines of beds and/or close to them, from which wells are drilled and/or mine openings are made in order to improve ventilation, deliver materials and bypass the mine inflow to lower point of the last bed where water tanks are laid. Preparation of beds depending on angle of inclination is performed as per horizon and/or panel schemes. Beds are drilled in long columns by means of underground method and depending on their angle of inclination as to spread and/or inclination by means of mechanised method with complete roof collapse. Coal extraction in troublesome zones, safety and barrier pillars is performed with shortwall faces using mechanical, mechanical-hydraulic and/or hydraulic methods.

EFFECT: increasing completeness of extraction of mineral product, reducing losses of deposits, volumes of stripping operations, environmental damage and improving ventilation of underground workings.

3 cl, 2 dwg