RU2819382C1 - Method for ventilation of underground mine workings - Google Patents

Abstract

FIELD: mining industry.

SUBSTANCE: invention relates to mining industry and can be used in artificial ventilation of underground mines. In the proposed method of ventilation of underground mine workings, which includes supply of fresh air into a vertical shaft through a ventilation channel with an opening using a fan and creation of resistance to movement of air flow ascending to the mouth of the shaft by means of plates, according to invention, resistance is created on lines of long air flow on side of shaft opposite to ventilation opening.

EFFECT: reduction of surface air leaks.

1 cl, 1 dwg

Description

The invention relates to the mining industry and can be used for artificial ventilation of underground mines and shafts.

There is a known method for ventilating underground mine workings (USSR author's certificate No. 1832155, E21F 1/16, publ. 08/07/1993), including supplying fresh air to a vertical shaft through a ventilation duct with a window using a fan and creating resistance to the movement of air flow ascending to the mouth of the shaft using ventilation doors covering the cross-section of the trunk.

The disadvantages of this method are significant capital and operating costs and large air leaks through the mouth of the shaft when lifting vessels pass through ventilation doors.

The closest to the proposed technical solution is a method for ventilating underground mine workings (RF patent for invention No. 2794147, E21F 1/00, publ. 04/12/2023), including supplying fresh air to a vertical shaft through a ventilation duct with a window using a fan and creating resistance movement of air flow upward to the mouth of the barrel using plates.

The disadvantage of this known method is large air leaks through the mouth of the barrel.

The objective of the invention is to reduce surface air leaks.

This is achieved by the fact that in the known method of ventilating underground mine workings, including supplying fresh air into a vertical shaft through a ventilation duct with a window using a fan and creating resistance to the movement of the air flow ascending to the mouth of the shaft using plates, according to the invention, resistance is created on the lines of a long air flow on the side of the barrel opposite to the ventilation window.

Distinctive features - placing the plates on long current lines on the side of the barrel opposite from the ventilation window creates resistance to the movement of the air flow ascending to the mouth of the barrel in its highest speed section, which allows reducing air flow through the mouth of the barrel with a limited width of the plates.

The technical result of the proposed solution is the reduction of surface air leaks.

The proposed method is illustrated graphically in Fig. 1, where 1 is the fan; 2 – ventilation duct; 3 – ventilation window; 4 – vertical trunk; 5 – upward air flow; 6 – downward air flow; 7 – mouth of the trunk; 8 – plate; 9 – long air flow line; 10 – axis of the ventilation duct.

The method of ventilating underground mine workings can be carried out as follows.

Fresh air is supplied to underground mine workings using a fan 1 through a ventilation duct 2 with a window 3 . At the exit from channel 2 into the vertical shaft 4 , the air flow is divided into ascending 5 and descending 6 . To increase the resistance to air movement towards the mouth 7 of the trunk 4, an inclined plate 8 in the shape of a half ring is placed on its wall (with a round cross-section of the trunk). The speed of the ascending air flow 5 when it interacts with the plate 8 decreases. As a result, the air flow in the upward flow 5 decreases, and in the downward flow 6 it increases.

To increase the efficiency of application, the plate 8 is placed on the long air flow lines 9 on the side of the barrel 4 opposite from the ventilation window 3 , since in this section of the barrel the upward flow velocity is maximum. One of the options for rational placement of the plate 8 is to install it along the boundary between the ascending 5 and descending 6 flows, for example, in an inclined plane passing through the upper edge of the window 3 parallel to the axis 10 of the channel 2 .

The use of the proposed method makes it possible to reduce the amount of surface air leaks through the mouth of a mine shaft and increase the efficiency of ventilation of mine workings.

Claims (1)

A method for ventilating underground mine workings, including supplying fresh air into a vertical shaft through a ventilation duct with a window using a fan and creating resistance to the movement of air flow ascending to the mouth of the shaft using plates, characterized in that the resistance is created on the long air flow lines opposite to the ventilation window side of the trunk.