Large dead zone residual ore recovery method

A recovery method and empty area technology, applied in ground mining, earth square drilling, underground mining, etc., can solve problems such as poor construction safety conditions, high mining costs, and low recovery rate, so as to improve safety conditions and improve residual ore recovery The effect of reducing ore falling and supporting costs

Inactive Publication Date: 2009-04-08
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the disadvantages of poor construction safety conditions, high mining cost and low recovery rate of the existing large-scale empty area residual ore recovery method, and provide a large-scale empty area residual ore recovery method, that is, forced caving and induced caving, The recovery approach is set up without pillar sub-section caving method. This recovery method can not only improve the operating safety conditions, but also reduce mining costs and increase the recovery rate of residual ore

Method used

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  • Large dead zone residual ore recovery method
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  • Large dead zone residual ore recovery method

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Embodiment Construction

[0012] Figure 1~ image 3 An ore body in Zhongyang has an average horizontal thickness of 120 meters. The upper part is affected by civilian mining and forms a very irregular honeycomb goaf. There are a large number of residual ore pillars in the goaf, and the height of the goaf is +20-60 meters.

[0013] Adopt forced caving and induced caving, and set up a recovery route to recover the residual ore 1 in the upper empty area, and the height of the section is 12 meters.

[0014] In Figure 1 and image 3 The lower part of the honeycomb-shaped goaf 1-72 meters horizontal excavation of the mining roadway 2, the distance between the mining roadways is 12.5 meters, and the drilling and mining operations are carried out in the mining roadway. The medium-deep hole falling method is adopted to form a large continuous space after blasting the bottom of the empty area and adjacent to the ore body, which induces the caving of the residual ore 1 in and around the upper empty area. The caving res...

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Abstract

The invention relates to a recovery method of residual ores in a large mined out space. The method comprises the steps of sublevel caving method without sill pillar, rock drilling and blasting in an inlet passage and ore removal; and is characterized in that: forced caving and induced inbreak are adopted by ore break down, a recycling inlet passage is arranged at the bottom of the mined out space, residual orebody inside and at the periphery of the mined out space to be recycled is divided into an induced inbreak area and a forced caving area from top to bottom, the continuous mined out space formed after the blasting is utilized to induce the inbreak of the ore at the upper part, and the recycling inlet passage is arranged in the ore body at the lower part of the mined out space. The method solves the problems of poor safety condition and low recovery rate and the like of the traditional residual ore recovery in the mined out space, realizes high degree of safety, low production cost and high recovery rate and the like of the residual ore recovery, and improves the production efficiency and economic efficiency of mines.

Description

Technical field [0001] The invention relates to underground mining technology, in particular to a method that can safely and efficiently recover residual ore in a large empty area. Background technique [0002] At present, the known method of recovering the residual ore caving in large empty areas is to leave part of the roof pillars and inter-pillars to support the roof of the empty area, use the original excavation roadways and empty areas, and use medium-deep holes to sink the ore in the lower part of the empty area. The footwall is made of artificial concrete or steel sheds to form the mine veins, and the mine funnels are arranged in both directions of the veins. Due to mining under an empty field, personnel need to enter the empty area for operation, and the safety conditions are poor; a certain number of ore pillars are reserved to support the roof of the empty area, only part of the pillars can be recovered, and most of the residual ore is difficult to recover, and the rec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/16F42D3/00
Inventor 周宗红
Owner KUNMING UNIV OF SCI & TECH
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