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Method for blasting inclined thin ore body by dividing ores and rocks in area in drift driving

A technology of tunnels along veins and thin ore bodies, applied in blasting and other directions, can solve the problems of low driving efficiency, poor blasting effect, and low depletion rate of by-product ore.

Inactive Publication Date: 2013-03-27
QINGHAI SHANJIN MINING
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  • Abstract
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Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of low excavation efficiency, difficult slag removal, poor blasting effect, poor safety conditions, and low dilution rate of by-product ore obtained by full-face blasting during the development of steeply inclined thin ore bodies along veins in underground mines. , to design a blasting method for ore and rock divisions, which can not only enhance the blasting effect, improve the efficiency of tunneling, improve the efficiency of ore and rock handling, but also reduce the dilution rate of by-product ores, reduce engineering costs, and improve mine economic benefits

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  • Method for blasting inclined thin ore body by dividing ores and rocks in area in drift driving
  • Method for blasting inclined thin ore body by dividing ores and rocks in area in drift driving
  • Method for blasting inclined thin ore body by dividing ores and rocks in area in drift driving

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Embodiment Construction

[0042] A gold mining area is divided into 6 gold ore belts from south to north. The exposed area of ​​the ore belt is about 3.0km long from east to west and about 1.0km wide from north to south. The gold belt strikes near east-west, dips south, with steep dip angles and large gradual changes, generally between 45° and 75°, and the occurrence is consistent with the strata. The outcropping range of the ore belt is about 3.0km from east to west, and about 1.0km from north to south. The mining area is mainly composed of quartz veins, which are relatively developed. The vein width is generally 0.3-4.0m, and the average thickness is 1.0m. The roof is carbonaceous phyllite, and the floor is carbonaceous sericite quartz phyllite, which has good stability; the ore types are quartz vein type and structural alteration rock type. The roadway is arranged along the direction of the vein, as a prospecting and mining layout project, and the roadway through the vein is arranged at a certain di...

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Abstract

The invention provides a technology for blasting an inclined thin ore body by dividing ores and rocks in area in drift driving, belonging to the field of mining engineering. A design process comprises the steps of: 1, dividing a waste rock area (9) and an ore area (10) according to an ore body and a rock distribution condition of a tunnel cross section; 2, arranging a main easer (1) and a secondary easer (2) at the lower part in the waste rock area; 3, arranging an auxiliary hole (3) in the waste rock area according to the size of the cross section; 4, arranging a breaking hole (6) in the ore area according to an inclination angle of the ore body and the size of the cross section; 5, arranging rim holes (4 and 7) and bottom holes (5 and 8) in the circumference edge and the bottom edge of a tunnel; 6, charging each blast hole; 7, sequentially initiating the blast holes; and 8, clearing slag after blasting, and respectively transporting the ores and the waste rocks. With the adoption of the technology provided by the invention, the quantity of the blast holes can be reduced, the use ratio of the blast holes can be improved, a blast effect can be enhanced, the driving efficiency and the ore and rock transportation efficiency can be improved, the dilution rate of the byproduct ores and the engineering cost can be reduced, and the economical benefits of a mine can be improved.

Description

[0001] technical field [0002] The invention belongs to the field of mining engineering, and in particular relates to a subregional blasting technology for excavation along a vein roadway of an inclined thin ore body. [0003] Background technique [0004] Precious metals such as gold, silver, and platinum are not only important industrial raw materials but also occupy an extremely important position in international finance, especially gold, which will occupy an increasingly important position in the future international monetary system, and will play an important role in ensuring national economic and financial security. is of great significance. Most of these precious metal ore bodies belong to inclined thin veins, and the roadways are usually arranged along the veins, and the by-product ores obtained by excavating along the veins account for a considerable proportion of the total mining capacity. The ore body of a gold mine belonging to Qinghai Shan Gold Mining Co., L...

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Application Information

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IPC IPC(8): F42D1/00F42D3/04
Inventor 赵伟朱先洪景泮印戚伟
Owner QINGHAI SHANJIN MINING
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