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A kind of tunneling and mining method of extremely thin vein ore body

A mining method and ultra-thin ore technology, which is applied in the direction of earthwork drilling, blasting, and discharge machinery, can solve the problems of ore quality decline, high mining cost, and low ore grade, so as to reduce ore dilution and improve mining efficiency. Effect of recovery rate, grade improvement and recovery rate of beneficiation and smelting

Active Publication Date: 2019-01-11
内蒙古金陶股份有限公司
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Problems solved by technology

[0002] In the excavation process of ultra-thin vein ore body, due to the thin thickness of the ore body, it is easy to cause the dilution rate to be too large in the process of full-face excavation, resulting in a serious decline in ore quality, low ore grade, and high mining costs

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  • A kind of tunneling and mining method of extremely thin vein ore body
  • A kind of tunneling and mining method of extremely thin vein ore body
  • A kind of tunneling and mining method of extremely thin vein ore body

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Embodiment

[0042] First of all, the cutting operation in the horizontal direction along the vein is carried out, and the surrounding rock is preserved to the maximum extent. The arrangement of explosive holes, charge structure and blasting sequence of the cutting operation are important basic tasks for separate excavation. Such as figure 1As shown, there are 10 first explosive holes, the depth of the core hole is 1.40-1.45m, and the depth of the auxiliary hole and the surrounding holes is 1.3m. After each blasting is completed, a blasting area section specification of 1.03m (width)×2.25m (height) is formed. The footage of 0.80-0.90m is ideal, which can meet the needs of rock drilling and by-product ore cleaning.

[0043] Under the condition that the layout of the explosive hole remains unchanged, the angle of the auxiliary hole and the structure of the charge are changed to implement throwing blasting, and 1 / 2 of the ore can be piled near the notch each time, creating conditions for mech...

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Abstract

The invention relates to a tunnelling and mining method of an extremely thin vein ore body. The tunnelling and mining method comprises the following steps: tunnelling and mining the extremely thin vein ore body along the vein direction to form a mining space, wherein the vein inclination angle of the extremely thin vein ore body is larger than 50 degrees, and the thickness of the ore body is smaller than 1.2 m; and when the extremely thin vein ore body is turnnelled and mined along the vein direction and the mining space of which is 4-5 long is formed, removing surrounding rocks around the mining space to form a laneway. The tunnelling and mining method has the advantages that first, tunnelling and mining are conducted along the vein direction to form the mining space facilitating turnnelling and mining, and after mining by 4-5 m, the surrounding rocks around the mining space are removed to form the laneway meeting the specification, so that the condition that the surrounding rocks aremixed in tunnelling and mining ores is reduced, ore dilution is reduced, the mining recovery rate is increased, the mineral dressing cost and the metal loss are reduced, safety and high efficiency are realized, the selected ore quality and the dressing and smelting recovery rate are improved, more gold is produced, and the comprehensive economic benefits are remarkable.

Description

technical field [0001] The present disclosure relates to the technical field of mining, and in particular, relates to a tunneling and mining method of an extremely thin vein ore body. Background technique [0002] In the excavation process of extremely thin vein ore body, due to the thin thickness of the ore body, it is easy to cause the dilution rate to be too large in the process of full-face excavation, resulting in a serious decline in ore quality, low ore grade, and high mining costs . Contents of the invention [0003] The purpose of the present disclosure is to provide a method for tunneling and mining of an extremely thin vein ore body, and the disclosed method can reduce the dilution rate of the ore body. [0004] In order to achieve the above purpose, the present disclosure provides a method for tunneling and mining of an extremely thin vein ore body, the method comprising: [0005] Excavation and mining of ultra-thin vein ore body according to the direction of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F42D1/00F42D3/04E21C37/00
CPCE21C37/00F42D1/00F42D3/04
Inventor 贾洪杰高延龙张长征王军李达张建华常海龙
Owner 内蒙古金陶股份有限公司
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