Blasting method for reducing depletion in steeply inclined thin ore body recovery

A thin ore body and steeply inclined technology, applied in the field of blasting, can solve the problems of large ore dilution, achieve the effects of simple blasting process, low dilution rate, and avoid waste of resources

Inactive Publication Date: 2013-04-03
QINGHAI SHANJIN MINING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The main purpose of the present invention is to design and adopt a new type of mining blasting method to reduce the caving of the surrounding rock near the vein footwall as much as possible in order...

Method used

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  • Blasting method for reducing depletion in steeply inclined thin ore body recovery
  • Blasting method for reducing depletion in steeply inclined thin ore body recovery
  • Blasting method for reducing depletion in steeply inclined thin ore body recovery

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Embodiment Construction

[0027] The combined charge blasting method of the bottom wall consists of 7 parts, namely: 1-upper section along the vein road; 2-lower section along the vein road; 3-recovery charge hole; 4-pre-splitting hole; 5-non-metal filling 6-big drug roll rock water gel explosive; 7-small drug roll rock emulsion explosive; 8-nonel.

[0028] The design steps are:

[0029] (1) Place the holes

[0030] According to the record of the actual measurement position of the ore body and roadway on the Autocad drawing, the site is based on the orientation of the wire, and the total station is used to measure the hole layout points in the lower segment along the vein roadway, especially for fault and bifurcated ore body drilling. Hole positioning is more precise and accurately marked.

[0031] (2) Drilling and inspection

[0032] The marked holes are drilled with the medium and deep hole drilling rig K41X. The inclination angle of the drilled holes is parallel to the ore body inclination. The ...

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Abstract

The invention provides a blasting method for reducing depletion in steeply inclined thin ore body recovery and belongs to the field of blasting engineering. The design process comprises the following steps: (1) actually detecting and locating a hole arrangement point in a lower subsection ore drift roadway (2) by using a total station; (2) drilling a recovery explosive-filled hole (3) and a presplitting hole (4) by using a middle-deep hole drill jumbo K41X and checking whether blast holes are in a good condition; (3) respectively filling the recovery explosive-filled hole (3) and the presplitting hole (4) by using a big cartridge rock water-gel explosive (6) and a small cartridge rock emulsion explosive (7) and stuffing the big cartridge rock water-gel explosive (6) and the small cartridge rock emulsion explosive (7) by using a nonmetal stuffing (5); and (4) after line connection is finished, detonating blast holes in a footwall, gradually carrying out microsecond detonating on the rest holes in a zigzag shape, detonating the blast holes by using a detonating tube (8) and igniting the blast holes by using an electric detonator. The blasting method for reducing the depletion in the steeply inclined thin ore body recovery, provided by the invention, has the advantages as follows: surrounding rock spallation of the footwall can be reduced, ore depletion is reduced, damages caused by the blasting impact to the surrounding rocks of the footwall can be reduced to a maximum extent, and the safety of follow-up ore removal is enhanced.

Description

[0001] technical field [0002] The invention belongs to the field of blasting engineering, and in particular relates to a blasting method for reducing dilution when mining steeply inclined thin ore bodies in medium and deep holes. [0003] Background technique [0004] In modern society, gold is widely used in international reserves, jewelry decoration and industrial and technological fields. At the same time, gold is irreplaceable for ensuring national economic security, national defense security and avoiding financial risks. With the dwindling of gold resources, some difficult-to-mining and difficult-to-select gold deposits have gradually become new mining objects. The ore body of the Guoluolongwa Gold Mine of Qinghai Shan Gold Mining Co., Ltd. has the characteristics of large dip angle and thin thickness, which is a typical Difficult to mine ore bodies. If the ore body with similar occurrence conditions is mined and blasted according to the conventional "five-point plu...

Claims

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Application Information

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IPC IPC(8): F42D1/00
Inventor 赵伟朱先洪景泮印戚伟
Owner QINGHAI SHANJIN MINING
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