Continuous mining technology of thin ore body subsection caving and retaining ore

Abstract

The invention relates to a sublevel caving shrinkage continuous recovery process for a thin ore body. The sublevel caving shrinkage continuous recovery process is characterized by comprising the following steps: dividing the ore body into sections; dividing the sections into subsections; carrying out accurate mining and cutting between an upper horizontal part and a lower horizontal part of each section; carrying out mining and drilling on a sector-shaped medium-length hole; and carrying out shrinkage recovery and ore removal. The sublevel caving shrinkage continuous recovery process has the advantages that other accurate mining projects are carried out in the ore body except an ore roadway; no top drift pillar and studding treatment projects are carried out; the ore body does not need to be subjected to auxiliary projects including slope ramps and the like; and large-size equipment is not used so that the investment is small and the effect is quick.

Description

technical field [0001] The invention belongs to the technical field of mine mining technology, in particular to a thin ore body segmental caving and continuous mining process for retaining ore. Background technique [0002] At present, the most commonly used underground mining methods at home and abroad include the sub-section caving method without pillars and the shallow hole retention method. [0003] The segmented caving method is to divide the ore body into several stages, divide the stages into several segments, and each segment is connected with the ramp. Under the overlying rock strata, blasting and mining work is carried out segment by segment from top to bottom, leaving no ore pillars, and segmental rock drilling, blasting and ore extraction are all carried out in the mining tunnel, which is safe and reliable. This method is mostly used in the mining of medium-thick and thick ore bodies. Its biggest defect is that the ore blasted in each stage is under the overlyin...

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Problems solved by technology

[0006] Although the current medium and deep hole mining is not suitable for thin ore bodies, the main reason is that the ore-rock boundary is not easy to control when drilling. less, the blasting is more restrictive, and the blasting effect is not good, so the current medium and deep hole mining technology is not suitable for thin ore bodies

[0007] For the thin ore body with a sharp slope thickness of 3m-5m, the above method has the following defects: if the sub-caving method is used for mining, it is necessary to make a ramp for walking up and down the mining equipment, and a large amount of engineering is invested.

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