RU2161115C1 - Method of coal pile formation - Google Patents

Abstract

FIELD: mining industry; applicable in storage of self-heating minerals. SUBSTANCE: method includes disposing of mineral by successive layers on pile base. In the course of pile formation, coal layers are compacted by wheels of dump trucks. Protective interlayer is arranged between layers on all sides of layer and is formed from porous ice with thickness of 10-15 cm by spraying water through medium of cold atmospheric air. Thickness of upper enclosing layer of mineral is taken equal to depth of maximum seasonal thawing in given region and thickness of internal layers is taken not less than 2 m. EFFECT: higher efficiency. 1 cl, 4 dwg

Description

 The invention relates to the mining industry, in particular to methods for forming a stack of coal.

 A known method of protecting stacks of solid minerals from self-heating and spontaneous combustion, including the separation of coal into small and large fractions and their separate storage [1].

 The disadvantage of this method is the complexity of operations for the separation of coal into fractions and their separate storage.

 The proposed method for storing a stack of coal is characterized in that during the formation of the stack, mineral layers are compacted by dump truck wheels, and a protective layer is placed on all sides of the mineral layer and it is formed from porous ice by spraying water through cold atmospheric air, while the protective layer make 10-15 cm thick, the thickness of the upper covering layer of mineral takes at least the depth of the maximum seasonal thawing in this region e and power inner layers take no more than 2 m.

 Introduced into the claims, an essential sign that during the formation of the stack the layers of minerals are compacted by the wheels of dump trucks can reduce the possibility of air circulation inside the layers.

 An essential sign that the protective layer is placed on all sides of the mineral layer provides isolation of the layer from air intake over the entire surface of the layer.

 An essential sign that the interlayer is formed from porous ice by spraying water through a medium of cold atmospheric air makes it possible to create a deformable protective interlayer without destroying it with pieces of mineral.

 An essential sign that the protective layer is made with a thickness of 10-15 cm, provides it with insulating properties.

 An essential sign that the thickness of the upper covering layer of a mineral is not less than the depth of the maximum seasonal thawing in a given region makes it possible to store a mineral in a stack for more than one year.

 An essential sign that the thickness of the inner layers of the mineral is taken no more than 2 m excludes spontaneous combustion of the mineral inside the layers.

 The essence of the method of forming a stack is illustrated by drawings, where in FIG. 1 shows the process of forming the first layer; FIG. 2 - creation of a protective layer of porous ice, in FIG. 3 - formation of the second coal layer, in FIG. 4 is a cross section of a stack of coal.

Symbols adopted in the drawings:
1 - the base of the stack;
2 - a coal layer;
3 - dump truck;
4 - sprinkler;
5 - a protective layer.

 The method of forming a stack of coal is as follows. Coal enterprises located in areas of the Far North, after the cessation of navigation and in the winter, are stored in inter-navigation stacks of coal. On the basis of the stack of coal 1 form the lower coal layer and with the help of dump trucks 3, which, moving along the layer, compact it. After the bottom layer is completely filled, using a Grad sprinkler, a protective layer 5 is created by passing sprayed water through a medium of cold atmospheric air, while the thickness of the layer of porous ice (firn) is maintained at 10-15 cm. In this case, coalesced droplets of ice create an insulating cover that prevents the penetration of air from one coal layer to another. In addition, such a layer thickness does not lose its insulating properties during the formation of overlying carbon layers. After creating the entire protective layer 5 proceed to the formation of the next coal layer. Subject to this technology, the stack height can be significant. The upper coal layer is also covered with a protective layer 5, which prevents the drift of coal dust in windy weather. In spring, the protective layer at positive air temperature will turn into water and moisturize the surface of the coal stack, which also prevents the drift of dust. When coal is shipped from the stack (by excavators or bulldozers), the protective layer 5 does not interfere with the shipment process, it also significantly reduces dust content at the places of shipment, and also significantly reduces dust content at the places of shipment. The formed stack of coal by this method can be stored for a long time.

The advantages of this method are:
- ease of forming a stack of coal;
- minimal physical and material costs for creating a protective layer;
- the exception of self-heating and spontaneous combustion of coal;
- reduction of dust during the shipment of coal;
- lack of drift of coal dust from the surface of the stack.

Sources of information
1. USSR author's certificate N 1586979, B 65 G 65/28, 1987

Claims (1)

 A method of forming a stack of coal, including placing the mineral on the base of the stack sequentially in layers, compaction of the layers of minerals, characterized in that during the formation of the stack, layers of minerals are compacted by dump truck wheels, and a protective layer is placed between the layers on all sides of the mineral layer and forming it is made of porous ice by spraying water through a medium of cold atmospheric air, while the protective layer is made 10-15 cm thick, oschnost upper covering layer minerals take at least the maximum depth of seasonal thawing in the area and capacity of the inner layers take no more than 2 m.

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