Super large-scale stope large-diameter, deep-hole and high-stage open stope subsequent backfilling mining method

Abstract

The invention discloses a super large-scale stope large-diameter, deep-hole and high-stage open stope subsequent backfilling mining method, wherein the method comprises the following steps: (1) actualmining scheme: vertical ore body orientation of ore blocks is arranged, the ore blocks are divided into ore rooms and ore pillars, the ore rooms and the ore pillars are arranged at intervals, double-middle-section continuous actual mining is adopted to divide a stope into two middle sections, and an actual mining method of middle section drilling rock separation, double-middle section continuousore dropping, bottom ore drawing structure sharing and subsequent primary filling is adopted; (2) accurate mining; (3) patio cutting; (4) drilling rock blasting; (5) ore drawing; and (6) filling. Themethod has the beneficial effects the super-large-scale stope has the advantages of small mining and cutting engineering quantity and large stope mining quantity; the stope is divided into two middlesections, rock drilling is performed, reduction of the technical difficulty of deep-hole rock drilling in the stope is facilitated, and the rock drilling efficiency of the stope is improved; with adopting of double-middle-section continuous ore dropping and bottom mine drawing structure sharing, the method has the advantages of increasing the production capacity of a single stope, reducing the mining-cutting cost and improving the actual mining efficiency and the like.

Description

technical field [0001] The invention relates to the technical field of mining methods, in particular to an ultra-large-scale stope mining method with large-diameter deep holes and high-stage empty stops followed by filling. Background technique [0002] With the continuous increase of mining intensity, some deposits with good geological conditions and high ore grade have already been mined, and mining has gradually shifted from the surface to the deep, and deep mining is facing problems such as high ground stress and high ground temperature. With the continuous improvement of mineral processing technology, some ores with lower grades gradually have mining value. In the initial stage of production, new mines are often faced with problems such as tight excavation replacement and insufficient reserves for mining. Especially for large-scale modern new mines with deep deposits, low ore grades, and rich resources, the safety of deep mining must be considered in the mining design o...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the existing new large-scale mines face the tension of excavation replacement, insufficient amount of ready mining, and the difficulty of ground pressure control, high production cost, and high production cost faced by mining work under specific conditions such as deep wells and low grades. The recovery rate of resources is low, so a large-diameter, deep-hole, high-stage empty stop and subsequent filling mining method is provided for this purpose.

Images