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A Controlled Blasting Method for Reducing Loss and Depletion

A technology for controlling blasting and depletion, applied in blasting and other directions, can solve problems affecting ore mining, beneficiation costs, and reduce mine economic benefits, and achieve the effects of controlling loss and dilution rate, good economic benefits, and efficient and precise separation.

Active Publication Date: 2021-11-12
SINOSTEEL MAANSHAN INST OF MINING RES +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Aiming at the problem of loss and dilution caused by ore-rock mixing at the ore-rock interface of steeply inclined ore bodies, there is currently no good low-cost and high-efficiency solution. The open-pit mines where too much rock is mixed will directly affect the cost of ore mining and beneficiation , reducing the economic benefits of the mine

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  • A Controlled Blasting Method for Reducing Loss and Depletion
  • A Controlled Blasting Method for Reducing Loss and Depletion
  • A Controlled Blasting Method for Reducing Loss and Depletion

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Embodiment Construction

[0018] In order to better describe the present invention, a controlled blasting method for reducing loss and depletion of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0019] Depend on figure 1 A control blasting method for reducing loss and depletion of the present invention is shown in the plan view of the control blasting technology. It can be seen that a controlled blasting method for reducing loss and depletion of the present invention is carried out on the open-air steps of pre-blasting according to the designed hole network parameters— The hole spacing a and the row spacing b are used to arrange the main charge blasting hole 3, and the ore-rock differentiation blasting hole 1 is arranged on the ore-rock boundary line 2, and the ore-rock differentiation blasting hole 1 hole spacing c is the main charge 0.6~0.9 times of the hole distance a of the blasting hole 3, and the rejection d between the blasting h...

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Abstract

The invention discloses a controlled blasting method for reducing loss and depletion. Conventional charge is carried out in the main charge blasting hole (3), and the ore-rock differentiation blasting hole (1) is arranged on the ore-rock boundary line (2). , the hole distance c of the ore-rock differentiation blasting hole (1) is 0.6~0.9 times the hole distance a of the main charge blasting hole (3), and the distance between the ore-rock differentiation blasting hole (1) and the nearest main charge blasting hole (3) The rejection d between the main charge blasting blastholes (3) is 0.6~0.9 times the row distance b; the ore-rock differentiation blasting blastholes (1) adopt radial uncoupled charges, and the uncoupling coefficient is 1.5 ~2. The invention sets ore-rock differentiation blasting holes at the boundary line of ore-rock, so that the ore body and rock mass can be separated efficiently and accurately at low cost, avoiding the mixing of ore or waste rock, and solving the technology of high loss rate and dilution rate in open-pit mining Difficulties, realize the separate mining and packaging of ore rocks, reduce the loss and dilution of ore, and create good economic benefits.

Description

technical field [0001] The invention belongs to the technical field of controlled blasting, and in particular relates to a controlled blasting method for reducing loss and depletion, especially for the accurate separation of ore and rock during step blasting in open-pit mining of inclined to steeply inclined ore bodies with medium thickness and above, so as to effectively improve the recovery of ore rate, reduce the loss and dilution rate, and improve the quality of ore recovery. Background technique [0002] Ore loss and dilution are important control indicators for evaluating the mining of ore deposits, and are used to evaluate the level of mining technology. In the process of ore mining, ore loss refers to the failure of ore to be extracted due to some reasons of mining technology and ore body itself; ore dilution refers to the reduction of ore grade due to the mixing of waste rock. Ore loss and ore dilution are both control indicators and economic indicators, which have...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F42D1/00F42D3/04
CPCF42D1/00F42D3/04
Inventor 刘为洲张西良杨海涛谢亮波崔正荣
Owner SINOSTEEL MAANSHAN INST OF MINING RES
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