SU574535A1 - Method of developing thick unstable ore body - Google Patents

Description

The invention relates to the field of black industry and can be used in the underground mining of ore deposits with the laying of the goaf.

There is a method of developing a powerful unstable ore deposit, which consists in dividing the excavation site into several horizontal layers, working each layer with transverse windings followed by laying them with concrete on the metal reinforcement laid beforehand on the soil for mining the subsequent layer under the roofing 1.

The disadvantage of this method is the high laboriousness of backfilling.

In addition, there is a known method of developing powerful unstable ore deposits with horizontal layers with a bookmark, in which the cleaning works are carried out under the protection of the backfill array from the roof side and the advancing support (artificial pillars) from the sides 2.

The disadvantage of this method of development is the greater laboriousness of the backfilling and the high cost of mining.

The purpose of the invention is to reduce the complexity and cost of mining.

This is achieved by preliminarily

throughout the excavation area, an advance concrete lining in the form of a grating is created by successively conducting one above the other network of workings along the strike and cross of the reservoir with subsequent laying them with a hardening mixture and creating a solid slab in the upper layer, under the protection of which they work out the entire excavation section.

FIG. 1 shows an ore body incision.

across the strike; in fig. 2 - section along

A-A in FIG. one; in fig. 3 - section along BB

in fig. 2

The preparatory work is

penetrating field 1 and ore 2 revolts them, of which lay drifts 3 and orta 4 respectively.

Mining operations begin with construction throughout the excavation site

Concrete bracing in the form of a volumetric lattice was carried out by successively laying backfills 5 and under them backfilling holes 6, in which insulating bridges 7 were installed and then laid with a hardening mixture. The upper layer is worked out completely and is filled with a hardenable material. Thus, a solid concrete overlap is constructed 8. The number of shchtrek 5 IL ;: onTo: i 6 i: a cnoi ;;: Kiiciif oi prochiostnyh characteristics of the ore deposit, but the span between them must be a multiple of their width. So, layer by layer, the drifts 5 and orths 6 pass one another along the strike and across the strike of the ore deposit, respectively, over the entire height of the excavation section. Each drift and ort as it goes is filled with a hardening bookmark.

Having thus strengthened the ore zone, under the zone, with the volume grate, refining works are carried out to extract the remaining ore in the excavation area with the development system in horizontal layers from top to bottom without additional attachment.

The invention allows to reduce the cost of the final product due to a 50% reduction in the consumption of backfill material and a decrease in the volume of labor-intensive work on laying the worked-out space.

Claims (2)

1. Smoldyrev A.E. Technologists and mechanization of backfilling. M., “Nedra, 1974, p. 84-86. 2. Malakhov, G.I. and others. On the development systems of the Yakovlevskoye field, - “Mining Journal 1973, No. 8, p. 6-10. L