Atmospheric pressure underground?

In summary, when calculating the total pressure at a subterranean point, it is important to consider both the atmospheric weight and the weight of the overlying soil. However, the air pressure can be ignored compared to the weight of the rock column above, so it is sufficient to add 14.7 to the pressure due to the weight of the earth.
  • #1
Shackleford
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As you go deeper underground, to calculate the total pressure at the subterranean point, would you sum the atmospheric weight plus the weight of the overlying soil? How does this work exactly? Thanks.
 
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  • #2
Depends what you are trying to calculate.
The air pressure (in a mine or tunnel) will increase, just like it decreases when you go higher, you add the surface atmospheric pressure to the extra weight of the column of air between you and the surface.
The pressure in the rock underground is the weight of the rock column above you - you can probably ignore the air weight compared to the weight of rock.
 
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  • #3
Since the atmosphere doesn't penetrate the ground, you just add 14.7 to the pressure due to the weight of the earth.
 

FAQ: Atmospheric pressure underground?

1. What is atmospheric pressure underground?

Atmospheric pressure underground refers to the pressure exerted by the Earth's atmosphere on objects or surfaces located below the ground surface. It is influenced by factors such as elevation, temperature, and weather patterns.

2. How does atmospheric pressure change underground?

As one goes deeper underground, atmospheric pressure increases due to the weight of the overlying layers of air. However, the rate of change is not constant and can vary depending on factors such as topography and geology.

3. Why is atmospheric pressure important to consider in underground environments?

Atmospheric pressure can have significant impacts on human health and safety in underground environments. It can affect the ventilation and air quality, which can impact the health and well-being of workers and residents. It can also impact the stability of underground structures and tunnels.

4. How is atmospheric pressure measured underground?

Atmospheric pressure can be measured using a variety of instruments such as barometers and manometers. In underground environments, it is often measured using specialized equipment designed for confined spaces.

5. Can atmospheric pressure underground be manipulated or controlled?

While atmospheric pressure cannot be directly controlled, it can be indirectly influenced through the use of ventilation systems or pressurization techniques. These methods can help regulate air flow and pressure in underground environments to improve safety and comfort for workers and residents.

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