SU1764535A1 - Method for recultivation of tailings dump - Google Patents

Description

one

(21) 4828992/15

(22) 04/02/90

(46) 09/30/92. Bul Number 36

(71) Production Association Ma to

(72) V.V. Bazylev, V.I. Roerich, V.V.Martyushov and L.T.Fevraleva

(56) USSR author's certificate

ISfe 1139379, cl. A 01 B 79/00, 79/02, 1983.

(54) METHOD FOR RIVER OF IVILATION OF THE TAILS- RANINGS

(57) The essence of the invention is to level the surface with a slope of 1-2 °,

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sequential laying of an impermeable layer of clay soils up to 0.3 m thick, a layer of coarse sand not less than 0.3 m thick, an impermeable layer of clay soils up to 0.3 m thick and dumping of a layer of potentially fertile rocks. At the same time, the sand layer is continuously moistened to a moisture content of 35–50% by supplying water through irrigation pipes laid at the level of the sand layer at the head of tailing dumps with its subsequent drainage through a discharge channel-collector. 1 ill., 1 tab.

The invention relates to methods of reclaiming industrial lands disturbed, in particular tailing dumps, and can be used in mining and chemical production plants.

There is a known method for the reclamation of sludge collectors, including the dumping of a waterproof layer of clay and a layer of potentially fertile rocks.

This method does not allow to reduce exhalation of radon from the surface of the reclaimed tailing dump containing natural radionuclides in the waste.

Also known is a method of reclamation of tailings, which includes dumping of a layer of potentially fertile rocks with a thickness of up to 6 mm, which makes it possible to reduce the exhalation of radon from the surface of the recultivated areas to background values.

The disadvantage of this method is its large labor intensity, since the delivery and dumping of such a number of potentially fertile rocks is economically unprofitable.

The closest in technical essence and the achieved effect is the method of reclamation of sludge collectors (in particular tailing dumps), which includes leveling their surface, consistently laying a layer of sand, a waterproof layer of clay soils and filling a layer of potentially fertile rocks.

The disadvantage of this method is its low efficiency and high labor intensity, since To reduce radon exhalation from the surface of reclaimed areas in this way, it is necessary to fill a potential fertile layer of not less than 6 m. It is economically unprofitable, and at a layer thickness of less than 6 m even in the presence of various layers, a decrease in radon exhalation is not enough.

The aim of the invention is to increase the efficiency of reclamation of tailings with a simultaneous decrease in the labor intensity of the work.

The goal is achieved by the fact that in a known method, which includes alignment PSP

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surfaces of tailings, sequential laying of a layer of sand, a waterproof layer of clay soils and dumping of a layer of potentially fertile rocks, the surface of tailings is aligned with a slope of 1-2 °; before laying a layer of sand, an additional waterproof layer of clay up to 0.3 m thick is laid, layer sand, which is used as a coarse fraction, not less than 0.3 m thick, and the waterproof layer of clay soils above the sand layer is laid up to 0.3 m thick, while the sand layer is continuously wetted m to a moisture content of 35-50% by feeding water through the irrigation pipes, which are laid on the sand layer level at the head tailings and withdrawing it through the spillway conduit-reservoir.

Comparative analysis of the inventive method with the prototype shows that the method differs from the well-known one in that the surface of the tailing dump is aligned with a slope of 1-2 °, then before laying the layer of sand, an additional waterproof layer of clay soils, up to 0.3 m thick, the coarse fraction is used as a layer, at least 0.3 m thick is laid, and the waterproof layer of clay soils above the sand layer is laid up to 0.3 m thick, while the sand layer is continuously moistened to a moisture content of 35-50% water supply through the irrigation pipes, which are placed at the level of a layer of sand at the head of the tailing, and drain it through the spillway channel-collector.

Thus, the claimed method meets the novelty criterion.

Comparison of the claimed solution not only with the prototype, but also with other technical solutions in the field of technology has not allowed to identify in them the signs that distinguish the claimed solution from the prototype, which allows to conclude that the criterion differs significantly.

The invention is illustrated in the drawing, which shows a cross section of a reclaimed tailing pond,

The method is carried out as follows: the area of the tailings pond is divided into sections 5 with an area of no more than 300 x 100 m.

Each section is aligned with a slope of 1-2 ° in the direction of the collector 4. The bottom and walls of the collector 4 are lined with waterproof material, for example, clay, concrete, bitumen, etc .. On the leveled surface of sections 5, pour a waterproof layer 2 of clay soils with a thickness of 0.3 m. A layer 3 of coarse sand 0.3 m thick is laid on this layer, and then the waterproof layer 2 of clay soils is again poured to 0.3 m. After laying the sand and

0 clay soils are filled with potentially fertile rock 0.6 m thick. An irrigation pipe 6 is laid at the head of the site at the level of a layer of sand 3 with a hole 7 along the entire length of the pipe, D

5 economical consumption of water produced subsoil irrigation. When water is supplied to the pipe 6, it enters through the opening 7 into the layer of sand 3, moves down the planned slope and encircles the layer of sand.

0 At the same time, water with radon dissolved in it enters the discharge port-collector channel 4 and can be used for irrigation.

The application of the proposed method according to

5 compared to the prototype allows improving the efficiency of the reclamation of tailings by reducing the exhalation of radon from their surface (see table) and at the same time reducing the laboriousness of work up to 2.5 times.

Claims (1)

Invention Formula A method of reclaiming tailings, including leveling the surface, consistently laying a layer of sand, a waterproof layer of clay soils, and dumping a layer of potentially fertile rocks, characterized in that Q to improve reclamation efficiency with a simultaneous decrease in labor-intensive work, the surface of tailings is aligned with a slope of 1–2 °; before laying a layer of sand, an additional waterproof layer of clay soils, up to 0.3 m thick, is used as a layer of sand. laid with a thickness of not less than 0.3 m, and waterproof 0 a layer of clay soils over a layer of sand is laid up to 0.3 m thick, while the sand layer is continuously moistened to a moisture content of 35-50% by supplying water through irrigation pipes laid at the level of a layer of sand at the head of tailing dumps with its subsequent discharge through a spillway channel collector.