Mining technology for gold ore

Abstract

The invention provides a mining technology for gold ore. The mining technology comprises a parameter determining step, wherein various parameters of a stope are determined according to the vein trend of the stope; a stope preparation cutting step, wherein according to the parameters, a haulage roadway, a stope preparation raise, connection roadways, a footwalling and a funnel of the stope are arranged; a chamber backstoping step, wherein a shallow hole backstoping mode is adopted, and backstoping is conducted in a layered mode from a footwalling roadway from bottom to top; a pillar recovery step, wherein a deep hole blasting recovery mode is adopted, through the raise and the connection roadways, upholes are drilled, blasting is conducted, ore is discharged through the chamber funnel, half of pillar studs is recovered, and bottom pillars are not recovered and serve as permanent losses to support chamber top and bottom plates. The ore recovery rate of a mine lot can be increased, the permanent losses in the mine lot can be effectively reduced, and resource waste and economic losses are reduced.

Description

technical field [0001] The invention relates to a mining process, in particular to a gold mining process. Background technique [0002] At present, for the mining of gold mines, the method of keeping ore with shallow holes is generally used for mining. This mining method has the advantages of simple structure and production process, convenient management, ore can be released by self-weight, small amount of mining work, and the mining cost is disclosed. But in practice, the most fatal shortcoming of the ore retention method is the problem of mining recovery rate. Theoretically speaking, the recovery rate of the mine house with shallow hole retention is 85%, and the recovery rate of ore pillars is 65%. In fact, in practice, the recovery rate of the mine house is far from being achieved. Generally, it is ideal to reach 70%, and the recovery rate of the ore pillar is less than 50%. The main problem lies in the link of large ore drawing in the last process of the shallow hole or...

AI Technical Summary

Problems solved by technology

[0002] At present, for the mining of gold mines, the shallow-hole ore retention method is generally used for mining. This mining method has the advantages of simple structure and production process, convenient management, ore self-weight release, small mining engineering quantity, and clear mining costs. But in practice, the most fatal shortcoming of the ore retention method is the problem of mining recovery rate. Theoretically speaking, the recovery rate of the mine house with shallow hole retention is 85%, and the recovery rate of ore pillars is 65%.

In fact, in practice, the recovery rate of the mine room is far from being achieved. Generally, it is ideal to reach 70%, and the recovery rate of the ore pillar is less than 50%.

The large-scale ore-drawing rate of the shallow hole retention method averages 60% to 75%, and a large amount of mined ore remains in the mining area to cause permanent losses, resulting in huge waste of resources and economic losses

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