Efficient stoping process of segmented medium-length hole stope

Abstract

The invention provides an efficient stoping process of a segmented medium-length hole stope. The efficient stoping process comprises the following steps that a panel stope to be mined is divided into a plurality of adjacent standard segmented medium-length hole stopes for mining, and horizontal blast holes and upward fan-shaped blast holes are combined to perform millisecond blasting of multiple rows of medium-length holes so as to realize efficient stoping; and two upward vertical medium-length blast holes are formed in the middle of the upward fan-shaped blast holes, so that the distribution range of blasting high stress is enlarged, and the boulder rate of caved ore is reduced. According to the efficient stoping process of the segmented medium-length hole stope, only one bottom column is reserved in one panel in one stope, so that the loss rate of ores is reduced, and the mining income is increased; the multiple adjacent stopes are mined as the same panel, and ore removal can be carried out by using the rock drilling roadway and the transverse ore removal roadway of the adjacent stopes, so that caved ore can be better discharged, and the mining efficiency is improved; and by means of millisecond blasting of the multiple rows of medium-length holes, the boulder rate of ore can be reduced, and the cost of secondary treatment is saved. The efficient stoping process of the segmented medium-length hole stope has the advantages of high ore recovery rate, low boulder rate, good mining quality, convenience in ore removal and the like.

Description

technical field [0001] The invention relates to the technical field of mining technology, in particular to a high-efficiency mining technology for segmented medium-deep hole stope. Background technique [0002] With the continuous development of the mining industry, large-scale and efficient mining has become an inevitable choice for the mining industry, and the choice of mining methods is particularly important. Mining method is to study the mining method of ore, which is an organic combination of mining, cutting and mining in space and time. In the mining method, the specific process of completing the three main operations of ore falling, ore handling and ground pressure management, as well as the relationship between them in time and space, is called the mining method. The mining technical conditions of the ore block play a decisive role in which mining process is adopted, so the mining method has essentially become the core content of the mining method, and it reflects ...

AI Technical Summary

Problems solved by technology

[0004] When mining and blasting in most medium and deep hole stopes, the method of constructing upward fan-shaped medium and deep holes and shock-absorbing blasting is used to realize the ore caving blasting. The destruction is not complete, the blasting effect is not good, and it is easy to produce large pieces, which increases the cost of secondary treatment

Most of the medium and deep hole stopes use the bottom structure of the trench to extract ore, so a V-shaped structure will be formed at the bottom of the stope; during the production process, the amount of ore in the bottom structure of the trench cannot follow the normal blasting process of the surface Recycling, so that after the stope is filled, there is still a part of the ore in the stope; and the two adjacent stopes adopt the same bottom structure, so that a triangular ore pillar is formed at the intersection of the two stopes, and the triangular ore pillar Recycling is a major problem plaguing mine production

When the size of the triangular ore pillar is small, the selection of pillar recovery construction equipment will be greatly restricted; when the quality of the filling body is poor, the triangular ore pillar will reserve a thicker wall ore, resulting in a low recovery rate of ore from the ore pillar

If the quality of the filling body on both sides is poor, it is easy to cause the retaining wall mine to collapse when recovering the triangular ore pillar, forming an underground debris flow, which poses a great safety hazard

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