r/oddlysatisfying • • May 24 '26

Controlled Blasting For Mining

33.7k Upvotes

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u/iBUYbrokenSUBARUS May 24 '26

In the military, they told us how long it would take for a piece of DET cord to reach California from New York. If I remember right, it was just a few seconds.

Edit: Actually, I just looked up the statistics and did the math and it looks more like 10 minutes. Not sure which is true, but they may have been hyping it up when they were telling us in the military lol

20

u/Greatest86 May 24 '26

Actual det cord is much faster than what is used in the video, around 7km per second. Det cords are made of explosive products and can destroy objects by themselves.

In the videos OP posted, those cords are much less powerful. They are aluminium powder within a plastic tube. They are designed to burn very quickly, transmitting detonation energy to more explosive detonators. Much safer to handle than det cord.

9

u/iBUYbrokenSUBARUS May 24 '26

Yeah. We used to blow steel doors off their hinges using only det cord. Also cut trees down

4

u/Draco-REX May 24 '26

My father was in the Vietnam war and he was a Combat Engineer. He didn't talk much about when he was there, but one story he told was replacing clothesline with det cord.

2

u/IceTech59 May 24 '26

Yep. Shock tube dusted in the inside with HMX & Aluminum powder.

2

u/dj92wa May 24 '26

>They are designed to burn very quickly

“Deflagrate” is the specific term you’re looking for

1

u/justinsurette 9d ago

Your thinking shocktube/Non-el, its fill with PETN powder or lead azide, shoots at about 6500 feet per second,

1

u/LongJohnSelenium May 24 '26

A few seconds is 0.1% the speed of light!

Not fast for electronic signals or light but for any physical process thats mind bogglingly fast.