SU1502814A1 - Method of mining mineral deposits with levelled ore intervals by subterranean leaching - Google Patents

Abstract

The invention relates to the mining industry and can be used for mining of mineral deposits. The goal is to reduce the leaching solution consumption and the degree of environmental pollution by reducing the spreading of solutions beyond the ore intervals. For this, simultaneous opening of all ore intervals (CW) by technological wells (C) is carried out, casing is carried out and filters are installed in productive CI, isolates all CIs, except the top one, by feeding C into the granular mass. The upper RI is leached until the concentration of the useful component in the productive solution falls below acceptable levels. The spent RI with resin, sodium bicarbonate or cement is isolated, the airlift tube is lifted to a level of granular mass and the water is fed from the surface into C to scour and remove the mass in the airlift capacity to open the underlying RI. These operations are repeated until all the RIs are fully mined. 1 hp ff, 4 ill.

Description

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The invention relates to the field of mining and can be used for mining mineral deposits by underground gelation.

The aim of the invention is to reduce the consumption of the leach solution and the degree of environmental pollution by reducing the spreading of the solutions beyond the ore intervals.

FIG. 1-4 show the sequence of operations performed.

The development of deposits in this way is carried out as follows.

At the same time, all ore intervals 1–3 of the deposits are opened by technological wells 4. After equipping the well 4, the zone of filters of ore intervals 2 and 3 is covered with sand 5 (Fig. 1). Development start with the upper ore interval 1.

After mining ore interval 1 filter zone within this

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the interval is cemented with 6 by any of the known methods, for example, by means of an eigensum (Fig. 2). Then, the zone of well 4 within the lower} 1 of its ore interval 2 is washed from sand 5 with airlift, to prevent cement from the zone 6 and effectively carrying out sand 5, the airlift tube 7 of airlift (Fig. 4) is lowered to sand plug 5, and water For operation, the airlift is supplied to well 4 from the surface in an amount equal to or greater than the volume of pumped pulp. After the.-Cleaning of the filter within the ore interval 2, proceed to its development.

The next ore interval 3 is tested using the same technology (Fig. 3).

Claims (2)

1. A method of developing mineral deposits with brown ore intervals by underground leaching, including simultaneously opening all brown ore intervals by technological wells with their subsequent casing and installing filters in productive ore minerals. tervala, the supply of imparting and pumping productive solutions with Fi92 further transporting them to the processing complex before the concentration of the useful component in the productive solution falls below the permissible value, characterized in that, in order to reduce development costs by reducing the leaching solution flow rate and reducing the degree of environmental pollution by reducing the spread of solutions beyond the ore after installation of filters, all ore intervals, except for the upper one, are isolated by feeding sand into the well and leaching the upper ore interval, and after falling to Oncentrating the useful component in the production solution below the allowable value, the spent ore interval is isolated and the underlying ore interval is opened by extracting sand from the well with an airlift, while water is emitted from the surface into the well to wash out and sand, and these operations are repeated successively until all ore intervals. 2. The method of claim 1, wherein the difference is that in order to isolate the spent ore interval, resin or sodium bicarbonate or cement is pumped into the well. cc) 4uh Ma Pulip Phi 3 (ft ig tt