A stope blasting mining method of medium hole combined with shallow hole construction

Abstract

The invention discloses a stope blasting recovery method for the construction of medium holes combined with shallow holes. The steps are as follows: 1. Construction of rock drilling roadways in the stope; , the diameter of the middle hole is 65mm; 3. The shallow hole is arranged below the height of the core, and the diameter of the shallow hole is 42mm; 4. The charge and filling adopts a discontinuous coupling charge structure; 1-3 rows, shallow holes ahead of medium holes and 1-2 rows of blasting; 6, ore extraction, blasting, ventilation, and start ore extraction; 7, blasting again, cycle operation. The present invention adopts the mining method of upward small subsection empty field and subsequent filling, utilizes the existing medium hole and shallow hole construction equipment to construct blastholes, and adopts the method of medium hole combined with shallow hole blasting to carry out stope mining, which has the advantages of high mining safety and low loss. It has the advantages of low dilution rate and high recovery efficiency.

Description

technical field [0001] The invention relates to the technical field of mine mining, in particular to a method for blasthole construction and blasting mining in a stope in which medium holes are combined with shallow holes for construction. Background technique [0002] In mine production, poor stability of ore-hosting surrounding rocks, well-developed structures and joints are often encountered, and the ore value is high, making mining difficult. Adopting the traditional open-field or caving mining method will cause large loss and dilution indicators, resulting in a large amount of economic losses, while adopting the upward horizontal layered filling mining method will cause problems such as poor mining safety and low mining efficiency. [0003] It is precisely because the traditional open-field or caving method of mining will cause problems such as serious stope landslides and uncontrollable loss and dilution indicators, which will cause a large amount of economic losses; a...

AI Technical Summary

Problems solved by technology

Adopting the traditional empty pit or caving mining method will cause large loss and dilution indicators, resulting in a large amount of economic losses, while adopting the upward horizontal layered filling mining method will cause problems such as poor mining safety and low mining efficiency

[0003] It is precisely because the traditional open-field or caving method of mining will cause problems such as serious stope landslides and uncontrollable loss and dilution indicators, which will cause a large amount of economic losses; and the use of upward or downward horizontal layered filling mining methods will lead to mining safety. Poor performance, complex mining process, high mining cost, low mining efficiency, etc.

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