Downward single-drift type layered filling mining preparation layer arrangement method and arrangement structure

Abstract

The invention relates to a downward single-drift type layered filling mining preparation layer arrangement method. The method comprises the following steps that S1, after a section connection roadway is constructed from an opening of a vein outer section roadway to an ore body footwall by a certain distance, a short vein connection roadway is constructed along one side of a vein; S2, a short vein is tunneled from the short vein connection roadway to an ore body hanging wall, and then a reinforced concrete artificial false roof and bottom is constructed in the short vein; S3, after the strength of the reinforced concrete artificial false roof and bottom meets the requirement, a retaining wall is constructed on the reinforced concrete artificial false roof and bottom, and the reinforced concrete artificial false roof and bottom is filled with paste for roof connection; and S4, a next short vein is constructed, and the step S2 is repeated. According to the method, construction is easy and convenient, the stability in the tunneling process is good, and the safety performance is better.

Description

technical field [0001] The invention relates to the technical field of mining in non-ferrous mines, in particular to a downward single-entry layered filling mining preparation layer arrangement method and arrangement structure. Background technique [0002] The downward single-entry layered filling mining method is a relatively mature mining method. The ore body mined has the characteristics of instability, fragility, and high value. It is widely used in non-ferrous mines with unstable ore rocks in my country. [0003] A certain mine has well-developed rock joints and fissures, and is extremely unstable. The ore body is distributed in layers, with a dip angle of 65°-87°, with an average dip angle of 75°. The average thickness of the ore body is about 6m, and the average grade is 2.35%. [0004] Downward single-entry layered filling method is adopted for mining. When the preparation layer project is arranged along the vein, due to the fractured ore and rocks, the joints and ...

AI Technical Summary

Problems solved by technology

When the preparation layer project is arranged along the vein, due to the fractured ore and rocks, the joints and fissures are relatively developed along the vein, it is easy to lose stability and collapse when the road is excavated, and the support strength is high, the cost is high, the operation safety is low, the difficulty is high, and the construction speed is slow. Even sometimes it will collapse as it is dug, making it difficult to form a lane

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