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Surface mining method

An open-pit mining and fracturing technology, which is applied in ground mining, underground mining, special mining, etc., can solve the problems of high block rate and high unit consumption of explosives, so as to reduce the large block rate, reduce the blasting large block rate, The effect of reducing the unit consumption of explosives

Inactive Publication Date: 2017-11-24
NORTHEASTERN UNIV
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Problems solved by technology

[0006] The object of the present invention is to provide an open-pit mining method to solve the problems of high unit consumption of explosives and high block rate in blasting mining of hard rock or extremely hard rock mines

Method used

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Embodiment 1

[0094] A tungsten-molybdenum mine is an extremely hard rock mine, which is mined by open-pit blasting. The main problem in production is that the rate of blasting large pieces is high.

[0095] Adopt the implementation process of surface mining method of the present invention as follows:

[0096] Step 1: Use ultrasound, geophysical prospecting, microseismic monitoring and other means to carry out geological exploration of the stope to obtain the original data on the development of ore and rock fractures in the stope (such as image 3 shown) and the necessary geological data in the mining process, and guide the subsequent drilling work.

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Abstract

The present invention relates to the technical field of surface mining, and more particularly, to a surface mining method for the purpose of solving the problems of excessively high unit explosive consumption and excessively high boulder yield of hard rock or extra-hard rock mines in blasting mining. The surface mining method comprises the following steps: manual cracking, i.e., manually cracking a surface bench according to fundamental geological data, a fracture spacing law, and mechanical properties and a firmness coefficient of mine rock; fracture monitoring, i.e., monitoring the manually cracked area to obtain a distribution and extension range of fractures; and blasting mining, i.e., carrying out blasting mining according to the distribution and extension range of fractures. The surface mining method of the present invention can be applied to surface mining of any mine variety, and more particularly, to surface mining of hard rock or extra-hard rock mines.

Description

technical field [0001] The invention relates to the technical field of open-pit mining, in particular to an open-pit mining method. Background technique [0002] Open-pit mining takes steps as a unit, starting from the surface from top to bottom, and mainly includes four business processes of piercing, blasting, shoveling and transportation. Among them, the step blasting operation is the top priority in each process. The quality of blasting directly affects the efficiency of shoveling and transportation and operation safety, and determines the production capacity and economic benefits of open-pit mines. Factors affecting the blasting quality of open steps include rock firmness coefficient, blasting parameter design, and the use of explosives. [0003] At present, the blasting quality is mainly improved by optimizing the blasting parameters. Specifically, the existing open-pit mining method is as follows: firstly, the geological survey of the stope is carried out to obtain ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/26
CPCE21C41/26
Inventor 柳小波邵安林金长宇毛亚纯肖冬孙效玉王连成
Owner NORTHEASTERN UNIV
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