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A kind of ore-rock contact surface tracing method

A contact surface and ore-rock technology, which is applied in the field of ore-rock contact surface tracing and mining blasting caving ore-rock contact surface tracing, can solve the problems of ore loss and dilution, limited identification ability, and difficulty in identifying dyeing materials with the naked eye. The effect of controlling impoverishment indicators, improving accuracy and timeliness

Inactive Publication Date: 2015-09-30
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The caving method is a mining method with high mining intensity, low cost and safe operation. However, during the process of releasing the caving ore, the surrounding rocks and waste rocks directly covering the upper part of the caving ore are lowered at the same time. Judging the contact surface between ore and waste rock, the identification ability is limited; if the ore rock sampling test results are used to judge, the representativeness and timeliness of the on-site sampling are flawed, resulting in the loss or dilution of ore is difficult to control
At present, there is a dyeing and marking method for the contact surface of ore and rock, but because the ore rock is prone to produce a large amount of powder in the process of blasting and lowering, it is easy to mix with the dyeing material, making the dyeing material also difficult to identify with the naked eye

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0014] Fill 1Kg of ferromagnetic powder at the bottom of the blast hole that controls the boundary of the ore: Fe3O4 powder, particle size ≤ 8 microns, and the powder ferromagnetic material is filled in the form of a columnar charge suitable for the blast hole. When the explosive explodes, the ferromagnetic material is scattered on the broken ore or waste rock on the contact surface with the ore rock, and a ferromagnetic detection device is installed at the ore drawing port. As the ore is drawn, when the ferromagnetic detection device detects an abnormal signal, It is considered that the ore-rock contact surface has reached the ore-drawing mouth.

Embodiment 2

[0016] Fill 2Kg of ferromagnetic powder at the bottom of the blast hole that controls the boundary of the ore: ferric oxide powder, particle size ≤ 10 microns, and the powder ferromagnetic material is filled in the form of a columnar charge suitable for the blast hole. When the explosive explodes, the ferromagnetic material is scattered on the broken ore or waste rock on the ore-rock contact surface. A ferromagnetic detection device is installed on the working face of the ore. As the ore is drawn, when the ferromagnetic detection device detects an abnormal signal , it is considered that the ore-rock contact surface has reached the mining face.

Embodiment 3

[0018] Fill 350ml of water-based ferroferric oxide at the bottom of the blast hole controlling the boundary of the ore, and the filling of the water-based ferric oxide is in a closed container suitable for the blast hole. When the explosive explodes, the water-based ferroferric oxide is scattered on the broken ore or waste rock at the contact surface of the ore and rock, and a ferromagnetic detection device is installed at the ore drawing port. As the ore is drawn, when the ferromagnetic detection device detects an abnormality When the signal is signaled, it is considered that the ore-rock contact surface has reached the ore-drawing mouth.

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Abstract

The invention relates to an ore rock contact surface tracking method, which belongs to the technical field of ore extraction. By attaching ferromagnetism powder on explosion broken ores and / or surrounding rocks of ore rock contact surfaces, arranging a monitoring device on an ore tapping hole or an ore removal working surface of a scrapper and dynamically monitoring ferromagnetism abnormal signals of ore rock contact surface ores or dead rocks discharged by a mine mouth through detecting instruments on site, the ore rock contact surface tracking method can improve the accuracy and timeliness of judgment of the ore rock contact surfaces, provides reliable foundation for draw control and is favorable for controlling loss index of ores.

Description

technical field [0001] The invention relates to an ore-rock contact surface tracing method, in particular to a mining blasting caving ore-rock contact surface tracing method, which belongs to the technical field of ore mining. Background technique [0002] The caving method is a mining method with high mining intensity, low cost and safe operation. However, during the process of releasing the caving ore, the surrounding rocks and waste rocks directly covering the upper part of the caving ore are lowered at the same time. Judging the contact surface between ore and waste rock, the identification ability is limited; if the ore rock sampling test results are used to judge, the representativeness and timeliness of the on-site sampling are flawed, which makes the loss or dilution of ore difficult to control. At present, there is a dyeing and marking method for the ore-rock contact surface, but because the ore rock is easy to produce a large amount of powder in the process of blas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V3/08
Inventor 李心一戴晓江
Owner KUNMING UNIV OF SCI & TECH
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