RU2400626C1 - Method for complex development of coal deposit - Google Patents

Abstract

FIELD: mining. ^ SUBSTANCE: method for complex development of coal deposit includes coal production in mine to form mined-out space and to fill it with broken-down rocks, discharge of coal to daylight and delivery to dressing works. Coal washing is carried out in dressing works to form concentrate, mill tailings and waste water. Waste water of dressing works is sent to mined-out space. Waste water, having passed through broken-down rocks in mined-out space, arrives to mine water collector. Treated water is discharged to daylight and is sent to settling bowl for reuse. ^ EFFECT: invention makes it possible to improve efficiency of coal deposit development and environment protection due to application of mined-out space for recycling of production wastes.

Description

The present invention relates to mining, in particular to the integrated development of a coal field by underground coal mining, its wet enrichment and purification of process water in the mined space of the mine.

A known method of developing a coal field, including the extraction of coal in a mine, its delivery to the surface, wet enrichment of coal at an enrichment plant and the purification of process water in a system of series-connected settling tanks [1]. The disadvantage of this method is the use of the most inefficient method of purifying process water - in the sump, where the water is drained, with a pollutant content many times higher than the maximum permissible concentration (MPC). This has a negative impact on the environment.

There is another way to develop a coal field, adopted as a prototype, including the extraction of coal in the mine, its delivery to the surface and the purification of mine water in the mine's mine [2]. The disadvantage of the prototype is that it only purifies mine water, i.e. the available opportunities for wastewater treatment from other sources are not fully used. This drawback reduces the efficiency of not only the development of a coal deposit, but also environmental protection.

The purpose of the invention is to increase the efficiency of development of a coal deposit and protect the environment through the use of the mine’s developed space for the disposal of production waste.

This goal is achieved by the fact that in the method of integrated development of a coal deposit, which includes coal mining in a mine with the formation of a mined space and filling it with collapsed rocks, delivery of mined coal to the surface and purification of mine water in the mined space, the mined coal is supplied for wet processing at enrichment plant, enrich it, and waste water after enrichment is fed into the mine’s worked out space, in which it is cleaned together with mine water, and then pumped out t to the surface and sent to the sump.

The method can be implemented as follows. A coal deposit is developed by coal mining and wet enrichment at an enrichment plant. Coal reserves are developed by underground (in the mine) method with the formation of the worked out space. At the same time, using water-resistant bridges, a number of drainage chambers are constructed from the worked out space, partially or completely filled with collapsed rocks. After the transfer of coal mining operations to the adjacent mine wing or to another enterprise, the mined-out space of this mine is used for wastewater treatment of the processing plant. To do this, the wastewater of the enrichment factory after wet enrichment of coal is sent to the mine's developed space - to the catchment. Having passed through the collapsed rocks in the catchment chamber as through a filter, the water will be cleaned of pollutants. Then the purified water is pumped out to the day surface and sent to the sump for subsequent reuse for the same purpose.

Thus, pollutants discharged to the surface along with the extracted coal are returned to the bowels, thereby reducing the environmental load on the natural environment, in particular on the surface; mine wastes and collapsed rocks are used for wastewater treatment, which increases the efficiency of environmental protection and the efficiency of the development of a coal deposit. In addition, in this method, secondary resources that have not been found worthy of use before are involved in useful activity — the developed space and collapsed rocks as a filter.

Information sources

1. Mining. Terminological Dictionary / G.D. Lidin, L.D. Voronin, D.R. Kaplunov and others - 4th ed., Revised. and add. - M .: Nedra, 1990, p. 256, 87, 341 (analogue).

2. A method of developing a shallow coal seam. RF patent No. 2284414, publ. 09/27/2006, Bull. No. 27 (prototype).

Claims (1)

A method for the integrated development of a coal deposit, including coal mining in a mine with the formation of a mined space and filling it with collapsed rocks, delivery of mined coal to the surface and purification of mine water in the mined space, characterized in that the mined coal is supplied for wet enrichment to an enrichment plant, enrich it, and water after wet enrichment of coal is fed into the mined-out space of the mine, in which it is cleaned together with mine water, and then pumped to the surface b and sent to the sump.