RU2238407C1 - Method for combined extraction of mineral resources deposits - Google Patents

Abstract

FIELD: mining industry.

SUBSTANCE: method includes performing mining operations by open and underground methods, forming underground mines in mined space of quarry by mounting supports and following filling of it with inner dump. In a quarry mounting of supports is performed at cross-over, for that width of latter is increased by dumping rock solids dump with a slant equal to cross-over slant, mounted supports are connected to underground mine, for example, gallery, support base is formed of opening rock solids covering supports and area with supports is filled by dump level.

EFFECT: higher efficiency, lower costs.

2 cl, 2 dwg

Description

The invention relates to mining and can be used in the combined development of mineral deposits.

There is a method of combined development of mineral deposits, including combining underground and open mines, driving underground workings with their exit into the quarry, using the mined-out quarry space for storing overburden [1].

The disadvantage of this method is the low receiving capacity of internal dumps due to the need to contain underground workings, for example adits, as a link between open and underground work.

The closest in technical essence is the method of combined development of deposits, including mining operations using open and underground methods, the creation of underground workings in the mined-out quarry space by mounting the supports and then backfilling it with an internal dump [2]. Prototype.

The disadvantages of the method are: limited use in the development of steeply dipping deposits; the lining is mounted on the soil of an exhausted mineral layer, a small capacity of internal dumps.

The claimed invention will allow to achieve a technical result, expressed in increasing the receiving capacity of internal dumps and reducing the cost of mining.

The specified technical result is achieved by the fact that in the known method for the combined development of minerals, including mining by open and underground methods, the creation of underground workings in the quarry mined out space by mounting the lining and then backfilling it with an internal dump, in the quarry, the lining is installed at the congress, for which increases the width of the latter by dumping a dump of rocks with a slope equal to the slope of the ramp, the mounted lining is connected to an underground mine, for example, an adit th, create a pillow from overburden rocks that overlap the lining, and fill up the area with the lining with the tier of the dump, and in the sections of the side job of the underground mining, mount the lining behind the rock movement zone, and if necessary, mount the lining on the dump, dumped to increase the width of the ramp, it they are constructed after 1.5-2.0 months of holding the blade until the end of deformations caused by the shrinkage of the dumped rocks.

New features in the proposed method are:

- an increase in the width of the exit due to dumping of the blade;

- installation of support at the congress;

- the removal of lining for the zone of movement in the areas of development of the mineral underground;

- the mounting of the lining on the blade is carried out after 1.5-2.0-month exposure required to complete the process of attenuation of deformations in the form of shrinkage of the blade after dumping.

The advantages of the proposed method are:

- the possibility of applying the method for steeply declining deposits;

- increase in the volume of internal dumps;

- installation of lining on a dump after its shrinkage and removal of lining beyond the zone of movement of rocks ensures the safety of lining.

The proposed method differs from the prototype in the foregoing sequence of operations. The features set forth in this combination are absent in the known solutions and provide a positive effect.

The proposed method has properties that do not coincide with the properties of the distinguishing features of known solutions.

An analysis of the known solutions shows that the essence of the proposed solution is not disclosed in them, it is not obvious, it is characterized by a new set of features, which allows it to be considered relevant to the criteria of "novelty" and "inventive step".

The method of internal dumping in the combined development of deposits is illustrated by drawings, where Fig. 1 shows in plan a plot of dumped internal dumps; figure 2 is a section aa in figure 1.

The method is as follows.

When conducting opencast mining in a quarry, extend ramp 1 by dumping the internal blade 2, mount the lining 3 at the ramp and connect it with an underground mine, for example, adit 4, create a pillow from the rocks of the roof 5, covering the lining, and fill the area with a dump tier 6, in the sections of the side job of the congress by underground mining 7, the lining is located behind the zone of movement of rocks 8, which is set according to the angle of movement β.

In order to fully disclose the technical nature and advantages of the invention, an example is given where the initial data are taken as follows: pit depth - 250 m; the width of the exit is 14 m; type of lining - SVP - 22.

Expand the congress. To do this, pour the internal dump with a slope equal to the slope of the congress. The width of the internal dump together with the width of the ramp will be: W = 14 + 9 = 23 m, where 14 is the width of the ramp; 9 - the width of the dump dump.

Installing the lining will take 5 m, then the width of the platform for mounting the lining will be 23-5 = 18 m

The lining is mounted, a pillow is created from overburden rocks and is filled up with a dump tier.

In sections of the side job of the congress by underground mining, the lining is mounted behind the rock displacement zone, and if necessary, the lining is mounted on a dump dumped to increase the width of the ramp, it is built after 1.5-2.0-month exposure of the blade until the deformation caused by shrinkage of the dumped rocks.

Thus, the above information indicates that the claimed method can be used in the mining industry, in particular in the combined development of mineral deposits.

Therefore, the claimed invention meets the criterion of "industrial applicability"

The application of the proposed method will significantly improve the technical and economic indicators of mines, to achieve the perceived technical result.

Sources of information

1. Reference. Open cast mining. M., Mining Bureau, 1994, p. 455.

2. Russian patent No. 2194858 for the invention "Method for the combined development of reservoir deposits", IPC E 21 C 41/00, publ. 12/20/2002, bull. Number 35.

Claims (2)

1. The method of combined development of minerals, including mining operations by open and underground methods, the creation of underground workings in the quarry mined out space by mounting the supports and then backfilling it with an internal dump, characterized in that in the quarry, the installation of supports is carried out at the exit, for which the width is increased of the latter, by dumping a dump of rocks with a slope equal to the slope of the ramp, the mounted support is connected to an underground mine, for example, an adit, a pillow is created from overburden rocks, lining support, and fall asleep area with lining tier dump. 2. The method according to claim 1, characterized in that in the sections of the side job of underground mining, the lining is mounted behind the zone of movement of rocks, and if necessary, the installation of lining on a dump dumped to increase the width of the exit, it is built after 1.5-2, 0-month aging of the blade until the end of deformations caused by shrinkage of the deposited rocks.

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