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Method for recycling ore pillars by middle-deep hole and deep hole united blasting technique

A deep hole and pillar technology, applied in blasting, ground mining, earthwork drilling and mining, etc., can solve the problems of hidden safety hazards, low recovery rate, large loss index, etc., achieve less engineering investment, lower dilution rate, highly operable effect

Active Publication Date: 2012-12-05
NORTHWEST RES INST OF MINING & METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to make full use of resources, it is necessary to reclaim these inter-pillars and top pillars. Usually, the inter-pillars and top pillars are recovered according to the recovery sequence of "first the top pillar and then the inter-pillar". Large, low recovery rate, and potential safety hazards

Method used

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  • Method for recycling ore pillars by middle-deep hole and deep hole united blasting technique
  • Method for recycling ore pillars by middle-deep hole and deep hole united blasting technique
  • Method for recycling ore pillars by middle-deep hole and deep hole united blasting technique

Examples

Experimental program
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Effect test

Embodiment 1

[0064] Through the ventilated pedestrian patio outside the vein, multiple blasting layers are sequentially divided on the inter-column of the mined-out mine room along the height direction of the inter-column, and the distance h between the upper and lower adjacent two blasting sub-layers is 14m; Arrange medium and deep hole rock drilling roadways whose axis is perpendicular to the axis of the ventilation pedestrian patio on each blasting layer, and the medium and deep hole rock drilling roadways are located on the bottom surface of the corresponding blasting layer; × 2.8m three-core arch; multiple rows of medium-deep hole blasthole groups are arranged side by side on the wall of the medium-deep hole rock drilling roadway, and the distance between two adjacent medium-deep hole blasthole groups is 1.2m; each medium-depth The blasthole group is composed of multiple medium-deep hole blastholes. All the medium-deep hole blastholes in a medium-deep hole blasthole group form a fan wi...

Embodiment 2

[0070] Through the ventilated pedestrian patio outside the vein, multiple blasting layers are sequentially divided along the height direction of the spacer column with a width of more than 15m in the mined mine house, and the distance between two adjacent blasting layers 12m, on each blasting layer, arrange two medium-deep hole rock drilling roadways whose axes are perpendicular to the axis of the ventilation pedestrian patio, and the two medium-deep hole rock drilling roadways are located on the bottom surface of the corresponding blasting layer; The two middle and deep hole rock drilling roadways in the blasting layer divide the spacer column into three parts equally. Multiple rows of medium-deep hole blasthole groups are arranged side by side on the top, and the distance between two adjacent medium-deep hole blasthole groups is 1.2m; each medium-deep hole blasthole group All the medium-deep hole blastholes in the blasthole group form a fan with the center of the vault cente...

Embodiment 3

[0075] Through the ventilated pedestrian patio outside the vein, multiple blasting layers are sequentially divided on the inter-column of the mined-out mine room along the height direction of the inter-column, and the distance between the upper and lower adjacent two blasting sub-layers is 15m; A medium-deep hole drilling roadway whose axis is perpendicular to the axis of the ventilation pedestrian patio is arranged on each blasting layer, and the medium-deep hole drilling roadway is located on the bottom surface of the corresponding blasting layer; the section of the medium-deep hole rock drilling roadway is 2.8m× 2.8m three-core arch; multiple rows of medium-deep hole blasthole groups are arranged side by side on the wall of the medium-deep hole rock drilling roadway, and the distance between two adjacent medium-deep hole blasthole groups is 1.1m; each medium-deep hole The blasthole group is composed of multiple medium-deep hole blastholes. All the medium-deep hole blastholes...

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Abstract

The invention discloses a method for recycling ore pillars by a middle-deep hole and deep hole united blasting technique. The method comprises the following steps: arranging middle-deep hole drilling drifts on barrier pillars of a worked-out chamber; arranging a plurality of rows of middle-deep hole blast-hole sets on the walls of the middle-deep hole drilling drifts; arranging a cutting slot gate way in each middle-deep hole drilling drift, and arraying a plurality of groups of blast-hole sets in the cutting slot gate way; excavating a deep hole drilling drifts in top pillars and arranging a plurality of rows of deep hole blast-hole sets on the walls of the deep hole drilling drifts; arranging nonel detonators on the bottoms of the middle-deep hole blast holes and the middle parts of the deep hole blast holes; using a complex network structure to be connected with the blast holes; using non-electric nonel detonators to detonate the main detonating cord for detonation, and detonating branch detonating cords by the main detonating cord; transmitting detonation wave to each non-electric millisecond detonator section by the connected detonators, and controlling each row of blast holes to detonate in sequence to complete ore pillar detonation; and recycling the detonated ore pillars after ventilation. With the adoption of the method, the barrier pillars and top pillars above the bottom pillars can be once detonated, thereby rate of ore dilution is reduced and the recovery rate is improved.

Description

technical field [0001] The invention belongs to the technical field of underground mines, and relates to a method for recovering ore pillars in underground mines, in particular to a method for recovering ore pillars by medium-deep hole and deep hole combined blasting technology, which is used to recover the space pillars left after mining by open-field method and top pillars. Background technique [0002] my country's metal mines generally adopt the open-field mining method, and most of the mines have left a large number of spacers and top columns after mining. In order to make full use of resources, it is necessary to reclaim these inter-pillars and top pillars. Usually, the inter-pillars and top pillars are recovered according to the recovery sequence of "first the top pillar and then the inter-pillar". Large, low recovery rate, and potential safety hazards. Contents of the invention [0003] In order to overcome the above-mentioned problems in the prior art, the objec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/16F42D3/04
Inventor 刘武团陈小平张亭菅玉荣刘财林凌世彬郭生茂雷明礼何良军张建沛严文炳
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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