RU2624490C1 - Method of the low and medium powered ore bodies preparation, cutting and mining - Google Patents

Abstract

FIELD: mining engineering.

SUBSTANCE: method of the low and medium powered ore bodies preparation, cutting and mining comprises the producing block reserves development by means of a system "Horizontal slices with the consolidating stowing" with the downward working when the 3-slices stocks from one slicing cross cut are mined-out. The producing block is mined-out in parts of 3 layers at a layer height of 3 m, in a base layer - 0.0 m there is a layerwise cross cut. The crossing track to the sublayer is went through on completing of a work on a layer mining. The divided cross cut in the sublayer is went through. The layer mining is carried out from this cross cut. The ore transportation is carried out through the crossing track till the base layer millhole. All the actions are repeated for the third layer after the layer mining. The cleaning stopes are discharged by the consolidating stowing at all layers after the actual mining. The layerwise cross cuts are not discharged by the consolidating stowing.

EFFECT: invention allows to keep costs on the ore crop down, to enhance the blocks stocks mining tempo, to cut down the scopes of first mining and stowing operations.

2 cl, 3 dwg

Description

The invention relates to the mining industry and can be used when using the development system "Horizontal layers with a hardening tab" in a descending order.

A known method of mining low-power and medium-power ore bodies by the development system "Horizontal layers with a hardening tab" in a descending order. The disadvantage of this method is the need for sinking on each layer of threaded workings - layered unit vectors.

The closest technical solution is the method of developing low-power ore bodies by a combined two-layer excavation, when after working out the reserves of the overlying layer, a groove is drilled - a layered unit below the soil, doubled in height of the worked layer at a distance equal to twice the height of the layer, that is, layered unit vectors pass through the layer [1 , 2]. The disadvantages of this method are: - limitation of its scope due to the stability conditions of the ore and the host rocks - the method is used only in ores and rocks, stable and medium stability; - the insertion of the underlying layer is carried out with vertical workings - ore pass, the rising and material rising method of laborious and dangerous.

The purpose of the invention is to reduce the cost of performing rifling and wastewater treatment by increasing the intensity of development of the operational unit as a result of a reduction in the volume of rifling and filling operations.

This goal is achieved by the fact that after mining the reserves of the base layer, threaded workings (exits to the underlying layer) are carried out. Ore bodies on the layer are mined by treatment approaches along strike of the deposit with ore delivery to the ore passes of the base layer and are repaid by the hardening tab. Then the congress passes to the next underlying layer, where mineral reserves are beaten off with their delivery to the ore passes of the base layer. Treatment entries are extinguished by a hardening tab.

The method is as follows: in FIG. 1 shows a plan for the preparation, cutting and testing of the base layer; in FIG. 2 presents a plan for the treatment of layers No. 2 and No. 3; in FIG. 3 - vertical projection of ore bodies and mine workings, section AA.

In the operational unit, consisting of low-power and medium-sized ore bodies, with ores and host rocks from unstable to stable, prepared according to the height of the floor, 8 haul-off ventilation 10 drifts, orts 1, 10; ventilation-running 3; stowing 11 and material 4; by uprising and ore passes 2, the reserves of the base layer 1 (± 0.0 m) are mined by treatment passes 7. The ore is delivered to the ore passes 2 layers. Cleaning entries are quenched with a hardening tab. From the layer orth 1, exit 5 is passed at an angle of 10 ° to the underlying layer (-3.0 m), a cutting unit 6 is passed and ore bodies are mined with the delivery of minerals to ore passes 2 of the base layer 1. The treatment fillings of the layer are extinguished by a hardening tab. Exit 5 at an angle of 10 ° passes to the next underlying layer (elevation of -6.0 m), where reserves are removed with ore delivered to the ore passes of the base layer (± 0.0 m) and the treatment planting bookmark is hardened.

The application of the proposed method for the development of low-power and medium-sized ore bodies will reduce the volume of rifling in the treatment unit by 2.5 times, filling operations up to 30% and, in general, the cost of mining ore from the treatment unit by 25-30%.

Information sources

1. STP 120 / 1-2004. The development system in horizontal layers in descending order (from top to bottom) and the use of hardening bookmarks. Combined two-layer excavation (KDV) of low-power ore bodies. Krasnokamensk, PIMCU, 2004 - 24 p.

2. Patent for invention No. 2209972 "Method for the development of co-occurring steeply dipping low-power ore bodies in stable and medium-stable rocks." Authors Fofanov N.P., Kayudin Yu.N., Galinov Yu.N., Ovseychuk V.A., Reshetnikov A.A., Kapitonov M.I., Surkov V.K. - M., State Register of Inventions of the Russian Federation, 4 p.

Claims (2)

1. The method of preparation, cutting and testing of low-power and medium-sized ore bodies, including the development of reserves of the operating unit by the system “Horizontal layers with a hardening tab” with a dredging in a descending order, when reserves of 3 layers are worked out from one layer ort, characterized in that the operating unit is worked out in parts of 3 layers with a layer height of 3 m, in the base layer - 0.0 m pass a layer ort, after completion of work on the layer pass the exit to the underlying layer, in the underlying layer pass a split ort, from of which the layer is being mined, ore is transported on the ramp to the base layer ore, after the layer is mined, all operations are repeated for the third layer, the treatment slots after ore excavation are extinguished by a hardening tab on all layers. 2. The method according to p. 1, characterized in that the layer orths are not extinguished by a hardening tab.

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