Method for realizing underground separation of raw coal

Abstract

The invention relates to a method for realizing underground separation of raw coal. The method specifically comprises the following steps of: (a) formulating an underground coal separation process; (b) selecting the type of equipment; (c) timbering an underground chamber; (d) arranging the equipment; (e) backfilling waste rocks; (f) setting an automatic system; (g) arranging cables; and (h) setting a safety system. The invention not only can reduce the ground occupation, but also can discharge the waste rocks in the raw coal before ascending the well, directly uses the separated waste rocks as underground sprayed concrete and backfilling materials of a mined out space and has great economic and social benefits; because underground mining causes serious ground mining damages, the waste rocks are directly backfilled to the mined out space after the waste rocks are separated underground, thus the influences of mining on the ground can be greatly reduced, and the environmental pollution is reduced; and the cost of constructional engineering is about 40 percent in the investment composition of a coal separating plant, thus the investment of the constructional engineering can be reduced if the coal separating plant is built in the underground chamber.

Description

technical field [0001] The invention relates to a raw coal separation method, in particular to a method for realizing the underground separation of raw coal. Background technique [0002] With the continuous improvement of large-scale mines and coal mining mechanization, especially the wide application of top-coal caving mining technology, a large number of faults in the working face or coal seam roof, floor and gangue are mixed into the coal flow line, resulting in the occurrence of raw coal mines. It can be seen that the amount of gangue has increased. In coal mining operations, the raw coal is generally not processed underground, but directly enters the bottom coal bunker, is lifted up by the hoisting system and then discharged, and a special storage site is required for the discharged gangue. Obviously, gangue transportation in the underground coal flow system is an ineffective transportation of the mine, and this part of ineffective transportation will greatly reduce t...

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Problems solved by technology

[0003] (1) Because the raw coal is transported from the underground to the ground before washing and processing, the energy consumption of gangue transportation is wasted, and the gangue after selection is easy to spontaneously ignite when stacked, which not only occupies a large amount of land, but also seriously pollutes the ecological environment;

[0004] (2) The dust generated in the production of the coal preparation plant is one of the key pollution sources of coal mines, especially the raw coal storage and transportation system of the coal preparation plant, which causes the content of inhalable particles in the air to exceed the standard;

[0005] (3) The noise pollution caused by the production of the coal preparation plant cannot be ignored. The noise of the main workshop of the coal preparation plant is generally not less than 80db, and the noise of the raw coal preparation workshop is greater than 100db, which not only seriously affects the physical and mental health of the workers, but also has a great impact on the environment outside the plant ;

[0006] (4) The sewage generated by the coal preparation plant has been a long-standing and difficult problem to treat for many years. Although significant progress has been made in the "closed circuit of washing water", soil pollution and water pollution caused by the discharge of coal slime water occur from time to time

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