SU1219820A1 - Method of airing open mines - Google Patents

Description

1

The invention relates to the mining industry and can be used to ventilate quarries with a convective air flow.

The purpose of the invention is to increase the ventilation efficiency and reduce energy consumption for the formation of an upward convective flow.

FIG. 1 shows a scheme for implementing the method; in fig. 2 is a diagram of the formation of a bubble-type thermal.

The formation of an upward convective flow is carried out in the following manner.

A given volume of air is isolated from the surrounding atmosphere by means of selective absorption of the film, which is characterized by a high absorptivity cd from the heat of solar radiation and a low radiation ability by B. converted infrared radiation, for example, of the Ifrane type (, 9; 6 0.2 ). Under the action of: solar radiation, the insulated volume of air is heated to a predetermined temperature 1219820/1

ry and then expel heated

the volume of air into the surrounding atmosphere. At the same time, the speed of the formed thermal can vary widely from a few meters per second to several tens of meters per second, depending on the temperature reached and the ambient temperature.

When thermals are released in a pulsed mode, a fixed convective flow can be organized at certain intervals of time.

As a result of the rise of thermals in the presence of inversion, the quarries are aired without destroying the entire layer of the latter, i.e. the process of removal of contamination is carried out in the windows. With an intensity of solar radiation of 500 W / m, otf 0.9.6 0.2, 300 K, heat transfer coefficient 5, an irradiation time of 5 min, the thermal velocity of 40–50 thousand meters at i 100 m is about 7–8 m /with.

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FKG, 2

Compiled by L.Serova; Editor, O.Golovach Tehred A.Aliev Proofreader L.Pilipenko

Order 1307/45 Circulation 436 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

. ШШ Patent, Uzhgorod, st. Project, 4

Claims (2)

1. A METHOD FOR CARRYING A QUARTERS, including the formation of an upward convective flow by heating air, characterized in that, in order to increase the efficiency of ventilation and reduce energy consumption for the formation of an upward convective flow, the heated volume of air is isolated from the surrounding atmosphere with a selective film and released after heating into the surrounding atmosphere. 2. The method according to π. 1, about l and h and u ~. and the fact that the heated volume of air is isolated using a selective ifran film. —— b—— \\ 27 77/27 // 7 '77 77 \ ~ -g ---- * 2 / Figure 1