Continuous Mining Method of Gently Inclined Vein Based on Combined Chessboard Bottom Structure

Abstract

The invention discloses a continuous mining method of a gently inclined vein based on a combined checkerboard type bottom structure. The continuous mining method comprises the following steps that (1) an ore body with the inclined angle being 20-35 degrees is divided into middle sections along the tendency of the ore body, inclined top pillars, ore rooms and ore pillars are reserved at the upper ends and the lower ends of the middle sections correspondingly, the ore rooms and the ore pillars are divided and alternately arranged along the trend of the ore body, and an extraction sequence that the ore rooms are mined firstly and then the ore pillars are mined is implemented; (2) a checkerboard type ore removal structure is set below the ore body, and V-shaped trenches are formed at the bottoms of each ore room and each ore pillar; (3) a plurality of short draw shafts are arranged at the bottom of each V-shaped trench at intervals in the horizontal direction of each V-shaped trench, the upper portions of the short draw shafts are connected with the V-shaped trenches, and the lower portions of the short draw shafts are connected with mining roadways of the checkerboard type ore removal structure; (4) extraction is conducted on the ore rooms; and (5) under the protection of a cementation body of an ore room goaf, extraction is conducted on the ore pillars. The continuous mining method of the gently inclined vein has the advantages that production capacity of a panel stope is large, ore removal time is short, the mining safety is high, resource loss is little, and the ore removal structure is reasonable.

Description

technical field [0001] The invention relates to the technical field of mining, in particular to a continuous mining method for gently inclined veins based on a combined checkerboard bottom structure. Background technique [0002] The high-efficiency mining of gently inclined medium-thick ore bodies, especially the gently inclined medium-thick ore bodies with a dip angle of 20-35°, is a global mining technology problem. On the one hand, the inclination angle of this type of ore body is slow, and the caving ore cannot be completely released at the bottom by its own weight, and it needs to be transported mechanically or manually; on the other hand, the inclination angle of this type of ore body is not suitable for direct climbing and direct access In the stope, the direct use of trackless self-propelled equipment cannot be realized through the pseudo-inclination arrangement; at the same time, the empty roof of the stope is high, and roof management is difficult, which brings ma...

AI Technical Summary

Problems solved by technology

On the one hand, the inclination angle of this type of ore body is slow, and the caving ore cannot be completely released at the bottom by its own weight, and it needs to be transported mechanically or manually; on the other hand, the inclination angle of this type of ore body is not suitable for direct climbing and direct access In the stope, the direct use of trackless self-propelled equipment cannot be realized through the pseudo-inclination arrangement; at the same time, the empty roof of the stope is high, and roof management is difficult, which brings major safety hazards to production

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