METHOD FOR DEVELOPMENT OF FLAT SEAMS OF MINERALS Russian patent published in 1997 - IPC

FIELD: mining industry. SUBSTANCE: in developing second order chambers, they are located in primary pillars and mining is effected after filling worked-out area of primary chambers with rock matter of deformed primary and inter-chamber pillars and with rock matter of crushed immediate roof and foot. This is done after stopped rock acquires sufficient strength and compression properties under action of rock pressure, and expected period of compressed rock mass acquiring sufficient strength and compression properties is determined by comparing final setting of ground surface at applied parameters of performing stoping operations at initial stage according to chart of increased setting of ground surface in zone of full development. EFFECT: high efficiency. 4 dwg