公开(公告)号：US20190301283A1

公开(公告)日：2019-10-03

申请号：US16300586

申请日：2016-11-21

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： Jixiong ZHANG ,  Qiang ZHANG ,  Xiancheng MEI ,  Kun FANG ,  Xiaole HAN

IPC: E21D23/04

Abstract: A method for recovering room-mining coal pillars by solid filling in synergy with artificial pillars. Solid materials and cementing materials on the ground are conveyed through a feeding well and a pipeline to a room-and-pillar goaf, a plurality of artificial pillars is cast at an interval in a coal room area, and gangue is cast to fill other regions of the coal room using a gangue casting machine. Under joint support by the artificial pillars and the coal room filler, coal pillars are recovered using a continuous coal mining machine, artificial pillars are cast in the original coal pillar area after recovery, and gangue is cast to fill the original coal pillar area using the gangue casting machine. A system for recovering room-mining coal pillars by solid filling in synergy with artificial pillars mainly includes a material conveying system, a joint support system, and a coal pillar recovery system. By constructing pillar grooves, casting artificial pillars, casting gangue to fill a goaf, and recovering coal pillars, the recovery rate of coal resources can be increased, and room-mining coal pillar recovery theories and technologies in China can be enriched while harmonious development of environmental protection and resource exploitation is promoted.