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Underground mine covering layer ore recovery method

A recovery method and technology of covering layer, applied in mining equipment, mining equipment, earthwork drilling, etc., can solve the problems of inability to meet mine production needs, cumbersome methods, and high dilution rate, so as to relieve mine production pressure and reduce ore loss. , the effect of relieving production pressure

Pending Publication Date: 2022-02-11
富蕴蒙库铁矿有限责任公司
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AI Technical Summary

Problems solved by technology

The existing methods are cumbersome, high dilution rate, and high cost, which cannot meet the production needs of most mines

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: The shape of the ore body is layered, irregular veins and parallel side veinlets, inclined to NE, with a thickness of 7-9m and a segment height of 16-17m. According to the mining method and the relationship between upper and lower layers, For the first mining stratification, the amount of ore collapsed by back mining is 23,000 tons, and the amount of ore shoveled out by normal mining is 6,750 tons; the remaining overburden ore is about 16,000 tons; 1. Construction of 3 sinking flat bottom structures, and transportation outside the vein The roadways are arranged vertically with a spacing of 10m. 2. The recovery of overburden ore is 6,740 tons, and the recovery rate is 41.6%.

Embodiment 2

[0014] Embodiment 2: Ore Body Form The ore body form is layered, irregular vein-like, and parallel lateral veinlets, inclined to NE, with a thickness of 8-10m and a segment height of 16-17m. According to this mining method and the upper and lower divisions Layer relationship, there are 3 layers in the upper part, and the remaining overburden ore is about 35,000 tons; 1. Construction of 4 sunken flat bottom structures, arranged obliquely with the transportation roadway outside the vein, with a spacing of 8m. 2. The recovery of overburden ore is 1.81 tons, and the recovery rate is 51.2%.

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Abstract

The invention discloses an underground mine covering layer ore recovery method. The method comprises the steps that selection of a bottom structure is determined, wherein the structure type is an ore loading bottom structure of rail equipment; the bottom structure is characterized in that the carrying equipment is a carry-scraper, and the secondary crushing is carried out in an ore loading roadway; a flat bottom type bottom ore removal structure and a trench type bottom ore removal structure are adopted, the flat bottom type bottom ore removal structure is adopted in the layer construction, and the trench type bottom ore removal structure is adopted in the lower layer construction. According to the method, a reasonable and applicable ore removal bottom structure is determined according to field rock drilling, the external size of shoveling and transporting equipment, a shoveling and transporting ore removal mode and the like; the purposes that the ore body is extinguished, no mining engineering arrangement area exists on the lower portion, the covering layer reserved on the upper portion is recycled, the ore recycling rate is increased, ore losses are reduced, ore resource waste is reduced, the mine production pressure can be relieved, and the descending speed is decreased are achieved.

Description

technical field [0001] The invention belongs to the technical field of underground mine mining, and in particular relates to a method for recovering ore from the overburden layer of underground mines. Background technique [0002] Mengku Iron Mine adopts sub-level caving mining method without pillars in the underground mine. During the implementation of this mining method, due to the requirements of mining technology, about 30 meters of ore must be reserved in the upper part of the mining process as a covering layer to meet the requirements of the underground ore body mining process. Water inrush prevention, debris flow prevention, freezing prevention, wind leakage prevention, ground pressure shock prevention, formation of extrusion blasting and end ore drawing conditions and other requirements. [0003] At present, the underground mine 1022 west along the vein; 1006 east three along the vein 1006 east approach; 989-972m level west along the vein ore body pinch out, there is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F13/06E21F17/00E21F17/18
CPCE21F13/063E21F17/00E21F17/18
Inventor 韩鹏举
Owner 富蕴蒙库铁矿有限责任公司
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