Pillar mining method of capsule reserved roadway actively connected to roof pillar method

Abstract

The invention discloses a bag reserved tunnel active roof-contacting room and pillar type pillar stoping method. The method comprises the following steps of a, according to the pillar and goaf distribution conditions, dividing the goaf into a reserving space and a to-be-filled space, and exposing at least one side of each pillar to the reserving space; b, putting a filling bag into the reserving space, and building a temporary filling retaining wall at an outlet of the goaf; c, filling the to-be-filled space; d, filling the air into the air bag, and extruding the filling slurry by the expansion action of the filling bag, so as to enable the filling slurry to actively and comprehensively contact top; e, after the filling body in the to-be-filled space is cured, detaching the temporary filling retaining wall, and removing the filled bag; f, using the reserving space as a working surface and a free surface to stope the pillars; g, after the pillars are stoped, treating the goaf. The method has the advantages that the adding of mining and cutting works, and the tunneling of filling body are not needed; the pillar stoping technology is simple, the resource recycling rate is high, the production efficiency is high, the safety is good, and the environment adaptability is good; the method is suitable for the pillar recovery and the goaf treatment after the room and pillar type mining.

Description

technical field [0001] The invention relates to the technical field of pillar mining in mines, in particular to a method for mining a pillar by actively connecting a roof pillar to a capsule reserved lane. Background technique [0002] The room-and-pillar method is used for mine recovery. In order to support the roof of the mining space, regular ore pillars are left in the empty field. According to the survey, according to the mining technical conditions, when the room-and-pillar mining method is used for mining, the amount of ore pillars left generally reaches 5-30% of the ore amount of the ore block, and when the ore value is not high, some can reach 40-60%. . [0003] The characteristic of mineral resources is non-renewable. With the continuous exploitation of mineral resources, geological reserves are decreasing year by year. The loss rate is extremely high, and if it is not recycled, it will cause a serious waste of resources. In order to increase the recovery rate o...

AI Technical Summary

Problems solved by technology

[0010] The present invention provides a pillar recovery method of proactively connecting the roof-pillar method to the reserved roadway of the capsule body to solve the problem of poor safety, complex mining process, large loss rate, low recovery efficiency and problems of mining with the existing room-pillar method. costly technical issues

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