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Mine gas properties
Release time:
2022-12-08
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(1) Colorless, tasteless, odorless gas, difficult to dissolve in water.
(2) The relative density of air is 0.754, which is lighter than air, so it often gathers in the air at the top of the mining.Inside.
(3) with strong diffusion. If there is gas in one place underground, it will spread to the same whole.Space.
(4) has a strong permeability. It can gush out into the excavation space through the coal rock layer;
(5) Combustible and explosive. When the gas content in the mine air reaches the appropriate concentration,To the heat source can cause combustion and explosion.
State of presence of coal dust
Coal dust produced by the coal mine is generally suspended in the air, and with the wind and drift, almost reach the well.down to all locations. Part of the underground coal dust is carried out of the mine by wind flow, and part of it sinks in the underground roadways and adit.Indoors. Underground coal dust can be divided into floating dust and falling dust according to its existing state.
Floating dust is coal dust suspended in the mine air, which can form explosions and make workers suffer from occupational diseases.
Falling dust is the dust that falls and deposits on the roof, side, floor and objects of the roadway due to its own weight in the mine.When it is disturbed by the outside world, it can fly up and become floating dust.
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