Truss-type filling method for underground mined-out area

Abstract

The invention discloses a truss-type filling method for an underground mined-out area. The truss-type filling method comprises the following steps that a, risks of falling rocks and wall caving of themined-out area are eliminated; b, drilling hole division in a plum blossom state mode is conducted on a mined-out area top plate (2); c, a drilling hole (1) with the diameter being 400 mm is drilledin the drilling hole position divided by the step b; e, a plurality of internal-tension rubber capsules (4) mutually communicating with the tails are lowered into the mined-out area through the drilling hole (1); d, the inner parts of the internal-tension rubber capsules (4) are filled with water; f, the mined-out area is filled with filling slurry with high cement-sand ratio; g, a filling body formed in the step f is maintained; and h, the internal-tension rubber capsules (4) are recycled. According to the truss-type filling method for the underground mined-out area, the problems that mine excavation limit of years is long, the mined-out area is large, a great deal of materials are required in filling, the mining cost is increased, and large financial burden is brought for mine enterprises can be avoided.

Description

technical field [0001] The invention relates to the technical field of goaf filling methods, in particular to a truss-type filling method for underground goafs. Background technique [0002] The stability and high cost of the goaf filling body in underground mining has always been a technical problem in mining. The traditional underground filling uses a lot of tailings as the filling body. However, due to the long mining life and the huge gob The tailing sand is not enough to fill all the goafs of the mine, so the mine has to purchase fly ash and other aggregates from the outside as the materials for filling the goafs of the mine, which undoubtedly increases the mining cost and brings great harm to the mining enterprises. a great economic burden. Contents of the invention [0003] In view of the above technical problems, the present invention provides a truss-type filling method for underground goafs, which can avoid the need for a large amount of materials during filling...

AI Technical Summary

Problems solved by technology

[0002] The stability and high cost of the goaf filling body in underground mining has always been a technical problem in mining. The traditional underground filling uses a lot of tailings as the filling body. However, due to the long mining life and the huge gob The tailing sand is not enough to fill all the goafs of the mine, so the mine has to purchase fly ash and other aggregates from the outside as the materials for filling the goafs of the mine, which undoubtedly increases the mining cost and brings great harm to the mining enterprises. a great economic burden

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