A high-efficiency mining technology for segmented medium-deep hole stope

Abstract

The invention provides a high-efficiency mining process for segmented medium-deep hole stopes. The panel stope to be mined is divided into a plurality of adjacent standard segmented medium-deep hole stopes for mining. The upward fan-shaped blasthole is combined with multi-row medium-deep hole differential blasting to achieve high-efficiency recovery. Among them, two upward vertical medium-deep blast holes are arranged in the middle of the upward fan-shaped blast holes to increase the distribution range of high blasting stress and reduce the bulk rate of caving ore. In this method, only one stope is left in one panel, which reduces the loss rate of ore and increases mining profits; and multiple adjacent stopes are mined as the same panel, which can utilize rock drilling tunnels and adjacent stopes. Mining through the vein-piercing tunnel of the stope can better extract all the caving ore and improve the mining efficiency. cost. The method has the characteristics of high ore recovery rate, low bulk block rate, good mining quality and convenient mining.

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 and deep hole stopes. 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 the organic combination of mining, cutting and recovery in space and time. In the mining method, the specific process of completing the three main operations of falling ore, ore transportation and ground pressure management, as well as the coordination 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 mini...

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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