SU877022A1 - Method of mining ore bodies with roof of sublevel caving-in - Google Patents

Description

(54) METHOD FOR DEVELOPING ORE FIELDS WITH FLOOR DECK

I

The invention relates to mining and can be used in the development of inclined and gentle ore deposits.

There is a method of mining subsurface drifts with mass ore blasting on the goaf 1.

The disadvantage of this method is a significant amount. preparatory work.

The closest to the proposed method is the development of ore deposits with subsurface caving, which includes layering of ore, ahead of the excavation of the overlying substage relative to the underlying, end ore production and collapse of overburden (2.

The disadvantage of this method is the high dilution of ore.

The purpose of the invention is to reduce the dilution of ore and the volume of preparatory. works

This goal is achieved by the fact that the breaking down and the production of ore from the overlying predating is done within a step of self-crushing of overlying rocks; the lower and lower levels and produce ore to the height of two sub-floors, then the collapse of ore in both sub-floors is carried out simultaneously in the same vertical plane and release broken ore until the deposited overburden is placed in the developed area at an angle of repose.

FIG. 1-4 illustrate the sequence of interrelated ore-mining operations, vertical | 1 | azres.

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The method is carried out as follows.

The upper sub-floor 1 is demolished by blasting wells 2, which are drilled from the drilling production 3. The lower sub-floor 4 is demolished in layers by blasting 5, drilled from the loading and haul excavation 6. The upper sub-floor 1 is collapsed ahead of the lower sub-floor 4. The ore of the upper sub-stage is partially exploded is discarded and, under its own weight, is moved to the loading and delivery voyage 6 of the lower sub-floor, where it is loaded into vehicles. Ore of upper sub-floor 1 is produced under the breed console

7 without dilution. The process of blasting and release of clean, not diluted ore is continued until the length of the rock cantilever 7 (LK) is less than the length of the natural break step () of the overburden.

When the LK length of the breed console reaches the Le.e. overlapping rocks, the subsequent fans of wells 2 are blown up so that the length of the LK console becomes, obviously, more than the length of the step collapsed.

In order to guarantee the collapse of the overburden, the borehole 8 may be rebased into the overburden. There is a natural collapse of overlying rocks. The collapsed ore 9 of the upper substage is produced at production 6 under the collapsed rocks 10, after which the ore of the lower substage 4 is collapsed in layers with release of it on a few two sub-floors 1 and 4.

The rocks 10 create a clamping medium for fixing the collapsed ore over the production of output. When aligning the downhole surfaces 11 of the upper 1 and lower 4 sublevels, these sublevels simultaneously collapse in the same vertical plane without advance to the formation of the rock slope 12 and the compensatory space 13 produced. diluting After the deposited overburden rocks 12 are placed at an angle of repose, they again conduct ahead of the upper substage.

Using the proposed method allows to increase the efficiency of production.

ores in the development of flat n inclined deposits.

Claims (2)

Invention Formula The method of developing ore deposits with subsurface collapsed, including layer-by-layer ore blasting, leading excavation of the overlying sub-floor relative to the underlying, end ore production, overburden collapse, characterized in that, in order to reduce ore dilution and the volume of preparatory work, breakdown of ore and release of ore breakdown, release and ore extraction the substage is produced within the self-destruction step of the overlying rocks, The ore blasting of the underlying subsurface is carried out after the overburden of the overburden is crushed, before the downhole surfaces of the overlying subsurface are flattened and the ore is raised to the height of two substates, then Sub-floors are simultaneously in the same vertical plane and release ore from the ore until the moment when the overlying collapsed rocks are placed in the developed area by the corner of the natural slope. Sources of information taken into account with experts. Mamsurov A.V. and Nikogosova L.R. Developing a block with a system of sublevel drifts with mass cutting of ore into the open space. “Tsvetna Metallurgn, 1974, No. 4, p. 13-15 .. 2. Inmentov V. R. The processes of underground mining prn the development of ore deposits. M., Nedra, 1978, p. 442-448 (prototype). LH LUJ, Q LK LUJ. 0 .J