What significance does brownian motion has to do with coal explosion?

In summary: SONIn summary, Brownian motion is a small scale effect caused by the random movement of particles suspended in a fluid. It is not likely to have a significant impact on coal dust movement, which is more likely influenced by larger scale effects such as ventilation. The smaller the particles, the greater the hazard they present due to their larger total surface area. Brownian motion is typically observed under a microscope. In terms of coal seams under hydrostatic pressure, it is unclear how this would affect Brownian motion. However, changes in hydrostatic pressure and the flow of gas (such as methane) may have an impact on the movement of coal dust.
  • #1
SecretOfnumber
20
0
Apparently :

What significance does brownian motion has to do with coal explosion?[Brownian motion or pedesis is the presumably random moving of particles suspended in a fluid (a liquid or a gas) resulting from their bombardment by the fast-moving atoms or molecules in the gas or liquid.]

Now I wish to know if This movement has anything to do with gas explosion?(Underground mining)
And does this motion happens under pressure in a coal seam?...briefly:

does gas show same property underground?(pressure,fluid,heat)And what techniques could speed it up?

Cheers,
SON
 
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  • #2
Brownian motion is a small scale effect, typically you need a microscope to observe it. I suspect movement of coal dust is likely to be dominated by larger scale effects such as ventilation or convestion?
 
  • #3
http://en.wikipedia.org/wiki/Coal_dust_explosion

has some interesting discussion but no mention of Brownian motion...

... Dust is defined as powders with particles less than about 500 micrometres in diameter, but finer dust will present a much greater hazard than coarse particles by virtue of the larger total surface area of all the particles...
 
  • #4
CWatters said:
Brownian motion is a small scale effect, typically you need a microscope to observe it. I suspect movement of coal dust is likely to be dominated by larger scale effects such as ventilation or convestion?


Thanks
Just wondering how small?(in scale) with coal seam under hydrostatic pressure what could be changed ?imagine a 10 meters thickness of coal (in a range of 10 kilometers) 400 meters under surface, what could we expect to see when many things ,including hydrostatic pressure changes ?and gas(ch4)starts to flow?

Cheers
 
  • #5


Brownian motion is the random movement of particles suspended in a fluid due to the impact of fast-moving atoms or molecules. In the context of coal explosions, this motion can play a significant role in the buildup of pressure and heat within a coal seam. As coal is mined and exposed to air, the particles in the coal can experience Brownian motion due to the surrounding gas molecules. This can lead to an increase in pressure and temperature, which can ultimately result in a gas explosion.

The same principles apply to gas explosions in underground mining. The gas molecules in the mine can cause Brownian motion in the coal particles, increasing pressure and heat. This can lead to a potentially dangerous gas explosion. Therefore, understanding the role of Brownian motion in these situations is crucial for preventing and managing coal and gas explosions.

To speed up the process of Brownian motion and potentially trigger a gas explosion, techniques such as increasing the airflow or introducing heat sources can be used. However, these techniques should be carefully managed and monitored to prevent the risk of explosion.

In summary, Brownian motion plays a significant role in coal and gas explosions, as it can contribute to the buildup of pressure and heat in coal seams and underground mines. Understanding and managing this process is crucial for preventing accidents and ensuring the safety of miners and the surrounding environment.
 

1. What is Brownian motion?

Brownian motion is the random movement of particles suspended in a fluid or gas due to collisions with the surrounding molecules. This phenomenon was first observed by Robert Brown in 1827 and has since been studied extensively in various fields of science.

2. How does Brownian motion relate to coal explosion?

Brownian motion is a crucial factor in the process of coal combustion and explosion. As coal particles are heated, they become more energetic and undergo Brownian motion, colliding with other particles and creating a chain reaction that leads to a rapid release of energy and explosion.

3. Can Brownian motion be controlled to prevent coal explosions?

While we cannot completely control Brownian motion, it can be managed to minimize the risk of coal explosions. This can be achieved by controlling the temperature and size of coal particles, as well as ensuring proper ventilation to disperse the heat and prevent the build-up of flammable gases.

4. Is Brownian motion the only factor in coal explosions?

No, there are other factors that contribute to coal explosions, such as the presence of oxygen, moisture, and other combustible materials. However, Brownian motion is a critical factor in the initial stages of coal combustion and can greatly influence the severity of an explosion.

5. Are there any real-world applications of studying Brownian motion in relation to coal explosions?

Yes, understanding the role of Brownian motion in coal explosions has led to the development of safety measures and technologies to prevent and mitigate the risk of explosions in coal mines and power plants. This knowledge also has implications in other industries where the handling of combustible materials is involved.

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