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Method for mining inclined and steeply inclined thin ore body

A thin ore body, steeply inclined technology, applied in surface mining, mining equipment, underground mining and other directions, can solve the problems of ore body caving, the collapse of the surrounding rock on the upper wall, etc., to achieve strong operability and reduce the amount of mining engineering , the effect of improving work efficiency

Pending Publication Date: 2022-03-15
NORTHWEST RES INST OF MINING & METALLURGY INST
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for mining inclined and steeply inclined thin ore bodies, so as to solve the problems of wall rock collapse and ore body caving in the mining process of thin ore bodies with unstable surrounding rocks

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  • Method for mining inclined and steeply inclined thin ore body
  • Method for mining inclined and steeply inclined thin ore body

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Embodiment 1

[0032] A copper mine in Gansu has delineated 5 blind small ore bodies on the main ore body through geological survey. The strike of the ore body is 320-340°, the dip angle is 53-71°, and the average thickness is 1.6-3m. The ore type is mainly infected chalcopyrite. The surrounding rocks of the upper and lower walls of the ore body are quartz horn-porphyry tuff, with well-developed schistostic structures and local fissure water. The surrounding rock has a metamorphic clastic tuff structure, which appears off-white, gray and gray-green to the naked eye. The rocks are generally subjected to alterations such as sericitization, chloritization, silicification, carbonation, and pyritization, and the alteration is particularly intense at the interlayer of the ore body.

[0033] The mine design adopts the shallow hole retention method with flat bottom structure. During the mining process, the surrounding rocks of the upper wall collapse and the ore body caving often occurs, thereby i...

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Abstract

The invention discloses a method for mining an inclined and steeply inclined thin ore body, which comprises the following steps of: dividing ore blocks along the trend of the ore body, and upwards digging an outside-vein pedestrian ventilation raise, a connection gateway and an ore removal roadway on a footwall of the ore body; the stoping sequence of advancing from one side of a stope to the other side and from bottom to top is adopted, blast hole drilling and one-time multi-hole multi-row blasting are conducted, point columns are reserved in the stoping process, wall-knocking and top-digging work is strengthened, and anchor rods are adopted for anchoring when necessary; firstly, one third of the ore is transported out by a forklift through an ore removal roadway, the reserved point columns and the caved ore support the hanging wall surrounding rock of the stope together, and after stoping is conducted to the top column position, a large amount of ore drawing is conducted; and blocking a transverse drift roadway, an ore removal roadway and the like of the stope by using grouted rubble. Through theoretical calculation and field practice, mining of the inclined thin ore body is achieved under the conditions that a filling technology is not newly built and the whole mining technology is not changed, and high operability is achieved.

Description

technical field [0001] The invention relates to the technical field of mining, in particular to a method for mining inclined and steeply inclined thin ore bodies. Background technique [0002] my country is a country rich in mineral resources, with abundant resources, complete varieties and wide distribution. However, compared with other countries, it has the characteristics of few large deposits, deeply buried ore bodies, and a high proportion of thin veins. The mining of thin veins has always had a series of problems such as high labor intensity, low level of mechanization, and prominent safety hazards. Especially for some thin ore bodies with unstable surrounding rocks, during the mining process, the surrounding rocks of the hanging wall collapse and the ore bodies caving often occur, which interrupts mining production and poses a huge threat to the lives of workers. For this reason, many stopes are abandoned in the middle of mining, causing a large amount of loss of min...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/22E21D9/14E21F1/18
CPCE21C41/22E21D9/14E21F1/18Y02A30/60
Inventor 高志荣周健强刘财林张亭焦满岱任育荣郝显福王贤伟牛生海周义生柳小强罗宏伟
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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