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A blasting mining method for horizontal ore pillars in a staged mining method

A mining method and ore pillar technology, which is applied in the blasting mining field of horizontal ore pillars in the stage mine mining method, can solve the problems of poisonous and harmful gas damage, high operation risk, and high ore dilution rate, so as to avoid over-explosion and dangerous Small resistance, effect of ensuring the filling quality

Active Publication Date: 2018-02-06
FUJIAN HAIXIA KEHUA FUXING CONSTR ENG CO LTD
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Problems solved by technology

However, the process of filling treatment is complicated, the investment is large, the cost of filling is high, the recovery efficiency is low, and the ore dilution rate is high, so it is generally only used when mining pillars containing precious metals, and the adaptability is limited.
The horizontal ore pillar is mined by the caving method. Generally, a large-diameter vertically downward parallel deep hole is arranged on the upper part of the horizontal ore pillar, and the horizontal ore pillar is recovered by cutting and pulling groove blasting or segmented one-time blasting. Since personnel and equipment have to enter this Drilling and blasting operations in the goaf in the middle section are vulnerable to roof rockfall and toxic and harmful gases in the goaf, and the operation is very dangerous

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  • A blasting mining method for horizontal ore pillars in a staged mining method

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0014] A blasting recovery method for horizontal ore pillars in a stage mine mining method is implemented according to the following steps:

[0015] ①Drilling fan-shaped medium-deep holes: such as figure 1 As shown, the mining roadway in the vertical pillar 3 on both sides of the horizontal ore pillar 1 left after returning to the mining house by the stage mine method is used as the rock drilling roadway 2, and the rock drilling roadway 2 on both sides goes to the horizontal ore pillar 1 respectively. Drill a row (7 in total) of medium-deep holes in one direction to form two rows of medium-deep holes on the left and right. The medium-deep holes in the same row are fan-shaped to form fan-shaped medium-deep holes. The apex of the fan is located on the center line of the rock drilling roadway. The direction of the fan-shaped medium-deep holes is ...

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Abstract

The invention discloses an explosion stoping method for a horizontal ore pillar of a sublevel caving mining method. The explosion stoping method comprises the following steps: (1) drilling a fan-shaped medium-length hole; (2) filling stripy emulsified explosive; (3) filling sand bags; (4) exploding a horizontal ore pillar, and the like. The explosion stoping method for the horizontal ore pillar of the sublevel caving mining method is small in danger, high in security and good in explosion effect, and the horizontal ore pillar is high in explosion stoping efficiency and relatively low in stoping cost.

Description

technical field [0001] The invention relates to the technical field of mine mining engineering and blasting engineering, in particular to a blasting back mining method of a horizontal ore pillar in a stage mine mining method. Background technique [0002] At present, the mining of thick and large ore bodies in metal mines usually adopts the stage mine mining method. The ore deposit is divided into upper and lower middle sections according to the elevation. In the first stage, the large-diameter vertical deep hole stage mining room method is used to return to the mining room. After the mining room is mined, a goaf is formed, and the horizontal ore pillars and vertical ore pillars between the two middle sections are left to support the surrounding rock together. The second stage adopts the filling method Or caving back to the mining pillar. [0003] The mining pillar is returned by the filling method, and the goaf is generally filled with waste rock, tailings or cement, and t...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/22E21B7/00F42D1/08F42D3/04
CPCE21B7/00E21C41/22F42D1/08F42D3/04
Inventor 廖兰秋吴春烨徐云森
Owner FUJIAN HAIXIA KEHUA FUXING CONSTR ENG CO LTD
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