Is there a difference in explosive force between successive explosions?

In summary, the conversation discusses the difference between simultaneous and successive detonation of explosive charges and the effects of shock front and energy release. The question arises from the belief that successive detonation can improve the explosive force due to self amplification, which is doubted. It is also mentioned that firing the explosions with a delay can result in a better shockwave in a specific direction, which is often utilized in mining and tunneling. The concept of "free expansion" and tamping of charges is also discussed, as well as the use of multi-chamber guns for similar purposes.
  • #1
Den Webi
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Suppose there are two explosive charges in a single casing. The detonation of the charges can be initiated either simultaneously (A) or in succession some milliseconds apart (B).

Does A differ from B in respect to the overall explosive force?
Can the shock front in B carry more energy in a certain direction?

This question arose from my friend's statement that a successive detonation improves the effect of an explosion due to some kind of self amplification process, something that I doubt.

Thank you in advance for your responses!
 
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  • #2
How do you define "overall explosive force"?
You can get a better shockwave in one direction if you fire the explosions with the right delay. This is frequently used to dig tunnels, or to fracture large areas of rock in mines.
 
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  • #3
Den Webi said:
overall explosive force?
Energy release is the same.
Den Webi said:
direction?
An ideal "free" explosion is releasing energy in a spherically symmetric manner. Bore a hole, tamp it with clay, and the "free expansion" is forced to do work. Tamp one charge with the pressure wave from another charge, and it's got something even more solid to push against while doing work.
 
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  • #4
Thank you MFB and Bystander!
 
  • #5
mfb said:
You can get a better shockwave in one direction if you fire the explosions with the right delay. This is frequently used to dig tunnels, or to fracture large areas of rock in mines.
Also similar: multi-chamber guns.
http://en.wikipedia.org/wiki/V-3_cannon
 
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1. What factors determine the explosive force of an explosion?

The explosive force of an explosion is determined by several factors, including the type and amount of explosive material used, the confinement of the explosion, and the surrounding environment.

2. Is there a significant difference in explosive force between successive explosions?

The explosive force of successive explosions can vary depending on the factors mentioned above. However, in general, successive explosions of the same magnitude and with similar conditions will have a similar explosive force.

3. Can the explosive force of an explosion be accurately measured?

Yes, the explosive force of an explosion can be measured using various techniques such as pressure gauges, high-speed cameras, and blast sensors.

4. Does the size of an explosion affect its explosive force?

Yes, the size of an explosion can have a significant impact on its explosive force. Generally, larger explosions will have a greater explosive force than smaller ones.

5. Can the explosive force of an explosion be controlled or manipulated?

The explosive force of an explosion can be controlled to a certain extent by adjusting the amount and type of explosive material used, as well as the confinement and surrounding environment of the explosion. However, the exact explosive force cannot be precisely controlled or manipulated.

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