Mechanized upward segmental recovery method

Abstract

The invention relates to a mechanized upward segmental recovery method. The recovery method includes the following steps of (1) conducting segmentation on a recovery field; (2) conducting arrangementof blast holes, wherein the 0-th row of blast holes are distributed along a segmentation line of the recovery field, the -1-th row, -2-th row...and -i-th row of blast holes and the 1-st row, 2-nd row...and n-th row of blast holes are sequentially distributed in a first segment and a second segment respectively in the direction away from the 0-th row of blast holes, the orifices of the 0-th row ofblast holes are positioned in the segmentation line, the array pitch between the 0-th row and the orifices of the -1-th row of blast holes is 1.4 m, the array pitch between the 0-th row and the orifice bottoms of the -1-th row of blast holes is 0.8 m, the array pitch between the 1-st row and the orifices of the 0-th row of blast holes is 2.3 m, the array pitch between the 1-st row and the orificebottoms of the 0-th row of blast holes is 1.4 m, the array pitch between the 2-nd row and the orifices of the 1-st row of blast holes is 0.5 m, the array pitch between the 2-nd row and the orifice bottoms of the 1-st row of blast holes is 1.5 m, the array pitch between the 3-rd row and the orifices of the 2-nd row of blast holes is 1.0 m, the array pitch between the 3-rd row and the orifice bottoms of the 2-nd row of blast holes is 1.5 m, the -1-th row, -2-th row and -i-th row of blast holes and the 3-rd row, 4-th row and n-th row of blast holes are all vertical blast holes facing upwards, andthe array pitch of these rows is 1.4 m; (3) conducting segmental blasting for discharging ore. The recovery method has the advantages that the safety is high, the recovery effect is great, and damageof the ore is small.

Description

technical field [0001] The invention relates to the technical field of mining, in particular to a mechanized upward segmental mining method. Background technique [0002] At present, mines widely adopt the mechanized up-to-middle-deep hole layered filling mining method. Segmented mining is to first recover a section away from the far end of the approach, and then recover a section near the end. For a mine stope with a width of 8m and a length of more than 50m, it is often necessary to divide the stope into two sections from the inside to the outside, and then use The trolley with a width of 8m is used for mining in sections, and for stopes with a length of more than 70m, it may even be necessary to divide the stope into three sections from the inside to the outside for mining. Segmented mining can reduce the amount of primary explosives, thereby reducing blasting vibration damage, improving safety, facilitating remote operation of shoveling and reducing losses. [0003] se...

AI Technical Summary

Problems solved by technology

[0004] Yet there are following two problems in above-mentioned conventional subsection mining method; One, as image 3 As shown, there are many turquoise rocks produced at the segmental incisions formed by the first stage blasting, and because of the high space and the inability to reversely process the turquoise rocks, there is a great safety hazard when shoveling out the ore dropped by the first stage blasting due to the falling of the turquoise rocks; 2. The distance between the blasting position of the second stage and the section cut is short, and there are serious safety hazards in the blasting operation of the second stage

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