Chute for storing ore in opencast quarry and mining method of opencast quarry

A mining method and quarry technology, which are applied in the mining of open pit mines, special mining, and earthwork drilling, etc., can solve the problems of increasing infrastructure costs, increasing production costs, and small production scale.

Inactive Publication Date: 2017-12-22
GUANGXI UNIV
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Problems solved by technology

[0005] When mining the bamboo shoot-shaped isolated peak deposit (with a slope greater than 45°), if the bamboo shoot-shaped isolated peak deposit is mined by steps, it will be difficult to build a safe uphill transportation road, and at the same time, it is difficult to maintain a certain advanced relationship between the steps of each layer, and there are potential safety hazards , and the production scale of the bamboo shoot-sha

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  • Chute for storing ore in opencast quarry and mining method of opencast quarry
  • Chute for storing ore in opencast quarry and mining method of opencast quarry
  • Chute for storing ore in opencast quarry and mining method of opencast quarry

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Embodiment 1

[0084] The limestone ore body in the mining area is medium-thick layered limestone of the Maokou Stage (P1q) in the lower Permian system, which is distributed throughout the mining area. The ore is of medium-level hard grade. Surface mining. The mining range of the mining area is +196.6m~+125.0m, the slope of the hillside is 60~80°, and the terrain is relatively steep. The mine has built an excavator up the mountain road to reach the highest elevation of +196.6m.

[0085] The ore body is mined by step mining chute ore-drawing open-pit mining method, with a layer height of 10m and a total of 7 layers. The highest ore layer is divided into ore blocks in order, from outside to inside are a, b, c, d..., and the next ore layer is similarly divided into a1, b1, c1, d1..., the width of the ore block is 5m, and the length is the same as The length of the seam is the same; reflected in figure 2 The middle, that is, the highest ore layer is a, b, and c from the outside to the inside,...

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Abstract

The invention provides a chute for storing ore in an opencast quarry and a mining method of the opencast quarry. The advantages of stepped mining and layered mining in safety and economy are fully absorbed, an opencast mining method for unified management of ore rock humping through the chute by use of natural dip angles and height difference of hillsides is formed, and the technical problem that safe uphill transportation roads are difficult to build when bamboo shoot type isolated peak ore deposits are mined in the stepped manner is solved. Original terrains are fully used, and the safe production requirement can be met while the best economic benefit is obtained; the defect of increase of the production cost due to the fact that ore retained on rock drilling platforms partially after blasting each time needs to be transported secondarily when the bamboo shoot type isolated peak ore deposits are mined in the layered mining manner is overcome.

Description

technical field [0001] The invention relates to the technical field of ore deposit mining, in particular to a chute for ore-drawing in an open-pit quarry and a mining method for the open-pit quarry. Background technique [0002] At present, open-pit mining plays a decisive role in the mining industry. According to statistics, the proportion of open-pit mining in the world's mineral resources has accounted for two-thirds. In the open-pit mining of non-metallic deposits, the main mining techniques include step mining and layered mining. [0003] In step mining, the ore rock is divided into several horizontal layers according to a certain thickness, and it is mined layer by layer in a ladder shape from top to bottom, and a certain advance relationship is maintained; In the stope, at the same time, to make the mining and transportation equipment reach the working level, it is necessary to build an uphill road; Enlargement, the opening of the new step working face enables the s...

Claims

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Application Information

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IPC IPC(8): E21C47/00
CPCE21C47/00
Inventor 李学锋
Owner GUANGXI UNIV
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