METHOD FOR PREPARATION OF EXCAVATION SITE AT CHAMBER DEVELOPMENT SYSTEM Russian patent published in 2016 - IPC E21C41/20 

FIELD: mining.

SUBSTANCE: invention relates to mining industry, preparation and development of stratified deposits. Method for preparation of excavation site in chamber development system includes division of mine field into working areas, driving of extraction galleries strata, connection of their inclination. First driving extraction galleries upper formation, then developed chamber upper formation. Alignment of upper chamber to pass slope of soil of lower reservoir, and end its deadlock horizontal workings. Passing excavation drifts of lower reservoir, and on bottom board and processing first chamber adjacent to chamber which passed in alignment of slope. Further, mined chamber connected to blind horizontal opening, which ends with a slope. Slope from upper layer to lower layer extends at an angle to ensure free movement of vehicles, while production of dead-end horizontal pass to a length equal to self-propelled equipment.

EFFECT: invention allows for preservation of integrity of inter-chamber pillars and reduces loss of minerals due to bias of penetration within treatment chamber.

3 cl, 3 dwg