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A method for recovering ore pillars from annular blastholes

A ore pillar and blast hole technology, applied in the field of annular blast hole recovery ore pillar, can solve the problems of difficulty, resource loss, and ore pillar recovery improvement, and achieve the effect of improving recovery rate, saving time, and speeding up drilling speed

Active Publication Date: 2019-09-24
MCC NORTH (DALIAN) ENG TECH CO LTD
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  • Claims
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Problems solved by technology

However, in some open-field mines in my country, after the mining of the mine room, the ore pillars have not been recovered for a long time, which not only caused the loss of resources, but also increased the difficulty of subsequent ore pillar recovery.

Method used

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  • A method for recovering ore pillars from annular blastholes
  • A method for recovering ore pillars from annular blastholes
  • A method for recovering ore pillars from annular blastholes

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] Such as Figure 1-3 Shown, a kind of annular blast hole method of the present invention reclaims ore pillar, comprises when open-pit turns to underground mining, ore block is arranged along ore body trend, and each ore block is divided into ore room and ore pillar, and development system and mining quasi-system include Stage transportation roadway 1, air return roadway Ⅰ3, return air shaft 2, pedestrian ventilation patio 6, pedestrian ventilation patio connecting roadway and bottom structure 12, adopts shallow hole ore retention method to carry out mining in stages, after the mining of the mine room is completed, a mine room is formed In the goaf 15 of different sizes, ore pillars are left in the first stage, and the ore pillars include thick ore pillars 8, top pillars 9, inter-pillars 10 and bottom pillars 11, and the distance between the thick ore pillars 8 an...

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Abstract

The invention relates to a method of recovering jambs by annular blast holes. The method comprises the steps that when transferring open pit mining into underground mining, ore blocks are arranged along the strike of an ore body, and each ore block is divided into an ore chamber and the jamb, and a development system and a mining preparation system are arranged. The method is characterized in thatthick jamb-roof pillar units are subjected to backstoping by adopting the annular blast holes and studding units are subjected to backstoping by adopting long fan-shaped blast holes. The method of recovering the jambs by the annular blast holes has the advantages that a first section of transition from open pit mining to underground mining is mined by adopting a shallow-hole shrinkage mining method, measurement work amount of a mine with the jambs not recovered for a long time can be reduced by using the recovering method, the time of jamb treatment is saved, meanwhile, the uniformity of thelumpiness of caving ore can be ensured, and the recovery rate of jamb recovery is improved.

Description

technical field [0001] The invention belongs to the technical field of recovery of underground ore pillars, and in particular relates to a method for recovering ore pillars through ring-shaped blastholes in which the ore pillars have not been recovered for a long time by adopting the shallow hole retention method for mining in the first stage of open-pit transfer underground. Background technique [0002] The shallow hole ore retention method is a kind of open field method. Generally, the ore block is used as the mining unit for mining. The ore block is divided into two parts: the mine room and the ore pillar. The mine room is the main part of ore recovery, and the ore pillar is the guarantee. The main part of production safety, pillars include top pillars, bottom pillars and inter-pillars. For stopes with gently inclined and inclined ore bodies, there are still a certain number of ore pillars in the field. Goafs are formed after mining in the mine, and the goafs must be di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/16F42D3/04
Inventor 程崇强王少泉蔺帅宇周育
Owner MCC NORTH (DALIAN) ENG TECH CO LTD
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