RU1776310C - Method of working of natural resources - Google Patents

Abstract

The invention relates to mining and can be used in open pit mining. The purpose of the invention is to reduce the loss of minerals in the areas of the variable power reservoir. The opencast mining of minerals is carried out to the border that is at least one distance from the underground pressure zone from the variable pressure reservoir section. Variable in capacity sections of the reserves are worked out underground using a pillar. After processing the site by the underground method, the pillar and the rest of the reserves are excavated by the open method. 2 ill.

Description

The invention relates to mining and can be used in open pit mining.

There is a method of open mining of minerals, including separate mining of ores to a reasonable limit (for example, power).

According to this method, when mining substandard deposits, separate excavation becomes impossible, and then the mineral goes to the waste dumps.

The disadvantages of this method are the high loss of minerals, additional costs

transportation of rock mass, increase in stripping ratio.

The closest in technical essence and the achieved result to the proposed method is a method of developing minerals in the near-boundary zones of the quarry, including open-pit mining of deposits, conducting mining workings under a slope of the working side of the quarry, underground mining of minerals and excavation of the pillar protecting the mine workings way. At the same time, the reserves of the deposit unsuitable for various reasons for an open-pit method are mined underground, but underground mining is carried out behind the design contours of the XJ quarry

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The height of the pillar is determined by its ability to maintain production. Deposits of low capacity for open work in the open pit circuit are also not selectively mined, which leads either to loss of minerals and an increase in stripping ratio, or to a decrease in its quality due to clogging with waste rocks.

The purpose of the invention is to reduce mineral losses in areas of a variable power reservoir.

The goal is achieved in that in the known method, including open pit mining, opening a section by underground workings, forming a pillar, mining a mineral underground method, according to the invention, open pit mining is carried out to a boundary that is not far from the variable power section less than the width of the zone of reference pressure from the underground mining, and underground mining is carried out within the boundaries of the site, and after its development, mining is conducted in an open way.

Figure 1 shows a section of a quarry with developed ore bodies; figure 2 is a section aa in figure 1.

The deposit is represented by one or several deposits 1, 2, and deposit 1 has a section 3 of variable (substandard) power for open-cast operations with boundaries 4-4. Deposits are mined openly up to border 5, which is separated from section 3 of ore with variable (substandard) power by the size of safety pillar 6. To refine the ore body of section 3 under OTKOCOP.I of the working bot 7 of the open pit there are adits 8, which are at border 4 substandard part 3 of ore body 1 or the boundaries of the whole ore body are knocked down by ventilation fault 9, Part of ore body 1 of variable (substandard) power 3 from tunnels 8 and ventilation shutdown 9 of the mineral ore sides are worked out by passes, and the array between tunnels 8 to ranitsy 4 pillar 6 - lava. Ore at the mine 8 is discharged into the open pit and transported by open pit mining. The safety pillar 6 with ore of conditioned capacity, separately from the host rocks, is mined open pit after completion of underground mining. After mining the ore pillar b, the overburden operations before opening the ore body 2 or other reserves in the quarry contour are carried out in the usual way

Special cases may include the following,

After working off substandard reserves of variable power 3, the conditional reserves 10 lying in the depths of the mountain massif are worked out after opencast mining of the pillar 6. Naturally, further overburden operations are carried out to develop the conditioned reserves 10 and 2.

If the extraction of the conditioned reserves has ended, then the safety pillar 6 is left in the empty (overburden) rocks, which is extinguished upon opening the deposit 2.

Using the proposed method will reduce the loss of minerals and

reduce the cost of stripping.

Using the proposed method in KMA quarries, where rich iron ores are associated mining during the opening of the main quartzite deposit,

will provide a reduction in the qualitative and quantitative losses of minerals by 50-60%,

Claims (1)

The claims A method of developing minerals, including opencast mining, opening a section with underground workings, forming a pillar, mining of underground minerals method, mining of the pillar, characterized in that, in order to reduce mineral losses in the areas of variable power deposits, mining is conducted in an open way to the border from a variable-thickness deposit site to a distance not less than the width of the reference pressure zone from underground mining, and underground mining of mineral resources is carried out within the boundaries of the site, and after its development they are mined in an open way. Fm