RU1802120C - Method for rock dumping - Google Patents

Abstract

Use: for utilization of coal-bearing rock mass and its subsequent use as ameliorant and fertilizer, as well as to reduce the fire hazard of dumps in open pits. SUMMARY OF THE INVENTION: Oxidized and non-oxidized rock mass is transported from the mine by separate transport streams and placed in an isolated dump with alternating horizontal layers. In this case, either during shipment, or when dumping into the dump, unoxidized carbonaceous rock mass is treated with antipyrogen. improving its fertile and reclamation properties and not containing toxic substances, for example, phosphoric acid. 3 tab. Yo

Description

The invention relates to the coal industry and can be used for the disposal of coal-bearing rock mass and its subsequent use as an ameliorant and fertilizer.

The purpose of the invention is to increase the reclamation properties of unoxidized carbon-containing rock mass and increase the fertility of the soil reclaimed by it.

The goal is achieved by placing oxidized and non-oxidized carbon-containing rock mass in a separate dump alternating horizontal layers with pre-treatment of each layer of non-oxidized carbon-containing

rock mass with antipyrogen in an amount of 0.5-5.0 wt.%, and the thickness of the layer of unoxidized carbon-containing mass should not exceed 1.5 m. After the formation of such a stack is maintained for at least 1 year under ambient conditions.

The proposed method for dumping carbonaceous rock mass in comparison with the known one allows to increase the yield of humic acids and, accordingly, the fertile and reclamation efficiency of unoxidized carbonaceous rock mass. When the blade is formed in alternating layers due to depolarization00

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As a result of the layer interaction between them, a potential difference arises, leading to ion and moisture exchange, which significantly accelerates the process of oxidative-hydrolytic destruction of unoxidized carbon-containing rock mass, which increases the yield of humic acids. The limitation of the layer thickness of 1.5 m prevents the formation of a critical mass at which coal spontaneous combustion is possible. The treatment of the carbonaceous rock mass with an antipyrogen, for example, phosphoric acid, in addition to increasing the yield of humic acids, increases the degree of reliability of preventing spontaneous combustion of unoxidized carbonaceous rock.

The method is carried out as follows.

Oxidized and non-oxidized rock mass is transported by separate transport streams from the section and placed in a separate dump with alternating horizontal layers. In this case, either during mining or in the dumping, the unoxidized carbon-containing rock mass is treated with antipyrogen, which improves its fertile and reclamation properties and does not contain toxic substances, for example, phosphoric acid.

The optimal compositions of brown coal-based ameliorants were determined by the yield of humic acids and the pH of the aqueous brown coal extract with the addition of superphosphate and NaHCO3 solution. in the presence of coal with the addition of superphosphate.

1. The studies were carried out with six mixtures of various compositions: 0 was added to the 100 angle fraction of 0.25 mm fraction; 0.5; 1.0; 2.5; 5.0; 10.0 grams of double superphosphate and 100 ml of water. The yield of humic acids was determined after 4 weeks of storage in air (see table 1).

The maximum HA yield is observed with the addition of superphosphate 0.5-5.0%.

2. To the investigated compositions was added distilled water in a ratio of 1: 2

and the pH of the aqueous extract was determined (see table 2).

Saline soils, as a rule, have an alkaline environment (up to pH 8.0) due to the presence of carbonate in the soil solution

Na; it is necessary that when the ameliorant is introduced into such soils, the pH shifts to the neutral region. This requirement is met by the addition of acid superphosphate to the acid coals of Adunchulun and Baganur in the range of 0.5-5.0%.

3. To 5 g of each mixture was added 100 ml of a 0.01 N solution of MaHCO3 (pH 8.2). After 1 day, we measured the pH of all solutions (see table 3). .

 The addition of superphosphate to coal in an amount of 0.5-5.0% creates a slightly acidic (pH 6) or acidic (pH 4.3) medium.

Claims (1)

The claims A method of dumping, including transporting carbon-containing oxidized and non-oxidized rock mass, dumping it into mercury and treating it with antipyrogen, characterized in that, in order to improve the amelioration properties of unoxidized carbon-containing rock mass and increase the fertility of the soil reclaimed by it, oxidized and non-oxidizable combustible carbonated layers with a thickness of not 1.5 m, with each layer of unoxidized carbon-containing rock mass being treated with antipyrogen in an amount of 0, 5-5.0 wt.%, After which the dump is kept in the atmosphere for at least 1 year. The output of humic acids,% Table 1 Table 2 pH values of an aqueous extract of brown coal with the addition of superphosphate PH values of NaHCO3 solution in the presence of coal with superphosphate Table 3