RU2536541C1 - Method of underground mining of pitching and underlay lodes - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: invention relates to mining and, in particular, to underground mining represented by pitching and underlay lodes. Mining of stopes during excavation of lodes is carried out in two stages. At the first stage the mined space is filled in moving the front of stoping by removing after ore breaking in each stope cycle from each ore embankment only part of a broken rock mass in the form of a strip adjacent directly to the stoping, the width of which is determined by the formula. Since when breaking of each layer in the mined space of stope a part of the ore embankment is left, after breaking the whole block the mined space is completely filled with the broken ore mass. At the second stage of mining the block the waterproofing of all mine roadway layout is carried out at its outer contour and using the methods of physicochemical geotechnology the useful components are removed from the ore, filling the mined space, and the ore recycled in such a manner is left as a backfilling.

EFFECT: invention enables to improve the efficiency of underground mining of pitching and underlay lodes, to reduce the amount of unproductive works on maintaining mined space, increasing with the increase in the depth of exploitation.

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Description

The invention relates to mining and, in particular, to underground mining of deposits represented by flat and sloping veins.

A known method for the development of flat and inclined ore bodies with leaching of stained ore [1]. The main disadvantage of this method is the impossibility of its application for the development of low-power ore bodies of a gentle and inclined bedding.

The closest to the technical nature and the achieved result is a method of underground mining of shallow and sloping veins with an ore shaft (prototype) [2]. The main disadvantage of this method can be considered the need for cyclical cleaning of the ore shaft and the need for laborious, increasing with the depth of development, work on fixing the worked out space as you move the front of the treatment excavation.

The aim of the invention is to increase the efficiency of underground mining of shallow and inclined cores and reduce the amount of unproductive work to maintain the developed space, which increases with increasing depth of development.

This goal is achieved by the fact that the mining of treatment units during the extraction of cores is carried out in two stages. At the first stage, the mined-out space is filled when the front of the treatment ditch is advanced by cleaning after ore breaking in each treatment cycle from each ore shaft only part of the beaten-out ore mass in the form of a strip adjacent directly to the treatment face, the width of which is determined by the formula l _p = L _from ( to _p -1), where l _p is the width of the strip in the ore shaft adjacent directly to the working face, from which the beaten ore mass is cleaned, m; L _from - the width of the beating layer, m; to _p - coefficient of loosening of the ore mass during explosive breaking, units Since during the breaking of each layer in the worked out space of the treatment unit, part of the ore shaft is left, after the breaking of the whole block, the worked out space will be completely filled with the beaten-off ore mass. At the second stage of mining the block, all workings on its external circuit are waterproofed and useful components are extracted from the ore filling the mined space using methods of physical and chemical geotechnology, and the ore processed in this way is left as a bookmark.

The invention is illustrated by drawings.

Figure 1 shows the General scheme of work at the first stage of mining block. Figure 2 shows the execution of work in the second stage of mining block.

The method of underground development of shallow and sloping veins contains a beating layer 1, wells 2, beaten ore mass 3, treatment 4 and mined 5 space, ore shaft 6, bottom 7, loading machine 8, removable strip 9 and the remaining part 10 of ore shaft 6, jumpers eleven.

The method is as follows.

Breaking of lead ore layers 1 using blast holes 2. As a result of the mass of broken ore 3 decontamination space 4 formed ore shaft 6, 7 adjacent to the bottom and having a width equal _to L = k L _{p by} where L _a - width of ore shaft 6, m; L _from - the width of the beating layer 1, m; to _p - coefficient of loosening of the ore mass 3 during explosive breaking, units Then, using one of the known types of loading equipment, for example, loading machines 8, part of the broken ore mass 3 of each ore shaft 6 is cleaned only in the form of a strip 9 adjacent directly to the working face 7 and having a width determined by the formula l _p = L _from (to _p -1), where l _p is the width of the strip 9 from which the ore mass is cleaned 3. Since when breaking each layer 1 in the worked-out space 5, part 10 of the ore shaft 7 is left, then after breaking the whole block, the worked-out space 5 will be full Strongly filled mass of broken ore 3 (Figure 1). At the second stage of mining the block, waterproofing is carried out using one of the known methods, for example, using pneumatic jumpers 11, all the workings on its external circuit and then using one of the known physicochemical geotechnologies, for example, using a pulsation-static underground leaching circuit, from the beaten ore mass 3, filling the mined space 5, useful components, and the beaten ore mass 3 processed in this way is left as a bookmark (figure 2).

Information sources

1. Lunev V.I. Mine systems for the development of uranium deposits by underground leaching. - M.: Energoizdat, 1982. - 128 p. (fig. 5.2 on p. 59 and fig. 5.3 on p. 62).

2. Trubetskoy K.N., Galchenko Yu.P., Sabyanin G.V., Shuklin A.S. The method of underground mining of shallow and inclined ore bodies of small and medium power. RF patent No. 2441163. Application No. 201028055/03. Priority 07.07.2010. Resh. about the extradition 02.09.11. Publ. 01/27/2012. Bull. No. 3 (prototype).

Claims (1)

The method of underground development of shallow and inclined cores, including preparatory, rifling and treatment works with breaking the cores, forming and cleaning the ore shaft, controlling rock pressure, characterized in that the treatment of the treatment unit is carried out in two stages, at the first stage the ore is beaten in the block and fill it with the worked-out space while advancing the front of the treatment ditch by removing from each ore shaft only a part of the beaten ore in the form of a strip adjacent directly to the mining face and having a width determined by rmule
l _p = L _from (to _p -1),
where l _p is the width of the strip in the ore shaft, from which the beaten ore is harvested, m;
L _from - the width of the beaten cut or the thickness of the beaten layer, m;
to _p - coefficient of ore loosening during explosive breaking, units;
at the second stage, waterproofing of all workings on the external circuit of the treatment unit is carried out and the useful components are extracted from the ore filling the mined space using methods of physical and chemical geotechnology and the ore processed in this way is left as a bookmark.

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