SU1583625A1 - Method of airing open mines - Google Patents

Abstract

The invention relates to the mining industry and can be used in underground and open-pit mining. The goal is to reduce energy consumption for airing due to the reuse of exhaust air from underground mine workings. Fresh air is supplied to the mining zone and to the lower part of the quarry through underground mine workings using a thrust source. Exhaust air is discharged through an assembly vent hole. In the latter, the exhaust air is cleaned of gas and dust and cooled to a temperature below the air temperature of the lower part of the pit. The purified air is then fed to the bottom of the pit and the polluted air is forced out of the pit. The temperature of the purified air supplied to the pit is maintained at 2-4 ° C below its temperature at the bottom of the pit. Using this method allows you to reduce overall depression. 1 hp f-ly, 1 ill.

Description

(2T) MP0992 / 31-03 (22) 04/15/88

07.08.90. Bul № 29, Krivoy Rog Mining Institute (46)

(71)

here

(72) A.E. Lapshin, V.G. Slyusarenko

and I.B. Oshm nsky

(53) 622.45 (088.8)

(56) USSR Author's Certificate No. 515873, “p. E 21 F 1/08, 1973.

USSR Author's Certificate No. 901560, cl. E 21 F 1/00, 1980.

(5) METHOD OF AIR VENTILATION

(57) The invention relates to the mining industry and can be used in underground and open-pit mining. The goal is to reduce energy consumption for airing due to the reuse of exhaust air from underground mine workings. Fresh air is supplied to the mining zone and to the lower part of the quarry through underground mine workings using a thrust source. Exhaust air is discharged through an assembly vent hole. In the latter, the exhaust air is cleaned of gas and dust and cooled to a temperature below the air temperature of the lower part of the pit. The purified air is then fed to the bottom of the pit and the polluted air is forced out of the pit. The temperature of the purified air supplied to the quarry is kept below its temperature in the lower part of the quarry. Using this method allows to reduce the overall depression. 1 hp f-ly, 1 ill.

about

S

(/)

The invention relates to the mining industry, in particular to methods for ventilating quarries and mines using mining and main ventilation fans, and can be used by mining enterprises in underground and open-pit mining.

The purpose of the invention is to reduce energy consumption for ventilation due to. reuse of exhaust air from underground mines.

The drawing shows a mine ventilation network connected by air discharge workings to the quarry, side view.

In order to ventilate pit 1, cleaned of dust and gas and cooled exhaust air 2, which has already been used to ventilate the underground mining zone 3 and supplied there due to the operation of the source of power along the main workings 5, are used. the installation of cleaning and cooling equipment uses an assembly underground ventilation outlet 6.

The airing of pit 1 is carried out as follows.

At first, fresh air is supplied to the underground zone 3 of the mining department for the main workings 5 using a 4 tons source.

After airing downstream zone 3 in the downstream direction, the contaminated air is guided through the assembly ventilation underground excavation 6, and it is cleaned from gases and dust, for example, shock-compensation filters installed in chamber JQ without additional energy sources. 7. At the same time, the measurement is carried out. In addition, the method makes it possible to reduce the overall depression by using instead of the ventilation shaft of the quarry space for the delivery of the mine air of underground workings.

The air temperature in Pit 1, where the air temperature of the lower layer 8 is measured, which is the coldest and has a higher density than the density of the upper layers.

If the temperature of the air delivered from the underground zone 3 of the mining operation is equal to or higher than the air temperature in layer 8, the air is cooled, for example, with water streams in chamber 7 of shock-compensation filters and maintain the exit temperature at pit 1 below the temperature of the lower layer 8 career air 1.

The more dense air injected by the fan from zone 3 into pit 1 does not rush into the upper atmosphere, but spreads along the bottom, creating an overpressure at the outlet of the assembly ventilation output 6 and displaces less dense polluted air from the pit. As the denser air is injected into the quarry, its volume increases continuously, and the volume of the career air decreases as a result of displacement,

The application of the method allows the use of purified and cooled air after airing the underground 6254

workings, deliver it through the assembly ventilation openings to the quarry, ensure efficient removal of harmful gases and dust from the quarries, reduce energy consumption for joint ventilation, as one shaft fan works in coordination with the natural gravity in the quarry

without additional energy sources

In addition, the method allows to reduce the mine-wide depression by using instead of the ventilation shaft of the quarry space for issuing the mine air of underground workings.

invention formula

Claims (2)

1. A method for ventilating quarries, which includes supplying fresh air to the mining zone and to the lower part of the quarry through underground mines using a draft source, characterized in that, in order to reduce the energy consumption for ventilation by reusing the exhaust air from underground mines , the exhaust air is discharged through an assembly vent underground excavation, in which it is cleaned of gas and dust and cooled to a temperature below the air temperature of the lower part of the quarry, and so it is fed into the bottom of pit and displace the contaminated air out of the quarry. 2. The method according to claim 1 characterized in that the temperature of the clean air supplied to the quarry is kept 2-4 C below its temperature in the lower part of the quarry.