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Can you blast through bedrock if you have enough TNT? I was mining and came accross it and I have 45 TNT blocks. If I could blast through it do you get to use the bedrock too?

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4 Answers 4

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It's not possible to break bedrock with any amount of TNT, since bedrock has such a high blast resistance that TNT simply can barely make a dent in it, let alone overcome it completely.

Bedrock has a blast resistance of 18,000,000. (That's 3,000 times more durable than obsidian.)

The explosion math is not straightforward, but a great simplification is that a block is destroyed if its blast resistance is overcome by the explosion power applied to it. An explosion's damage is done by radiating a number of lines out from the centre of the blast, and applying damage alone those lines to blocks at intervals (every 0.3 metres) along the lines. If all of a line's damage is absorbed by one or more blocks it has passed through, no farther intervals are checked.

So, the amount of damage a block of TNT can do simultaneously to a particular piece of bedrock is the sum of the damage applied by all the rays that intersect it. This calculation has already been worked on that page as "The minimum block resistance required to absorb maximum blast force of an explosion happening in nearby air". For TNT under optimal conditions (the TNT is sitting on the block), this is 77.67. That means that a block of TNT will destroy a block with 77 points of blast resistance, but not a block with 78.

Explosion damage appears to not be additive (though the deobfuscated code is unclear enough that I'm not 100% certain either way), in that explosion damage seems to be checked for each individual explosion in a separate run of the explosion code and there's no code to save partial blast damage for later explosions to add to, so simultaneous explosions don't add together. We can see this in evidence by causing many, many explosions on a massive scale, and observing that the bedrock appears to remain entirely intact:

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+1. This is an incredible answer, and I never even thought of it this way. –  Jeff Gohlke Apr 10 '13 at 0:07
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Note that in the video, it's Minecraft Alpha, so it's possible that the blast resistance of the bedrock has been increased even further. Incredible all the same. –  Jeff Gohlke Apr 10 '13 at 0:14
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@Jeff True, though if so that just means you need an even bigger ball of TNT than in that video… which would be awesome. –  SevenSidedDie Apr 10 '13 at 0:41
    
An even bigger ball right here, on what appears to be a later version of Minecraft. Notably, there are no holes in the bedrock this time, despite clearing what looks like acres of land down to bedrock. –  SevenSidedDie Apr 10 '13 at 1:05
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@KevinReid & Russell I've had time to rework this now, and go over the explosion code again. It does look like damage isn't additive, and eliminating the faked video makes the remaining evidence paint the opposite picture. Thanks for the holding my argument to the fire--you've made this answer better (but still nicely explodey). –  SevenSidedDie Apr 10 '13 at 17:29

No, you cannot. Bedrock is impervious to everything in Survival mode. The only way to break bedrock is to switch to Creative mode and break it yourself.

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As SaintWacko says, the only way to break bedrock is to go into Creative mode. I just wanted to point out that the reason you cannot blast through bedrock with TNT is that bedrock has a blasting point of 18,000,000 damage. Most blocks are in the damage resistance range of 15-30.

Source: Minecraft Wiki

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No, actually SevenSidedDie could not be more wrong. It is a common misconception that you can stack damage to a block in minecraft, but in reality it would have to be a single block that does the trick, therefore it would have to be a mod. Does this make sense?

Quote from Wiki "It is a common myth that Bedrock can be destroyed by a sufficient quantity of TNT. Examinations of the Minecraft code have shown that multiple explosions do not add damage to blocks; any block that is not destroyed by one TNT immediately adjacent to it will not be destroyed by additional TNT"

Therefore saying that the TNT damage value would have to be greater than or equal to 18,000,000. Not only does this have to be a TNT block, in the early days of Minecraft Alpha you could tape down your mouse to continually hit the bedrock block, because the damage accumulated to greater than the bedrock value. So if someone were to go into the code and change the damage value of a pick, TNT or whatever it may be to greater than 18,000,000 than it would destroy the Bedrock. So even in theory, it is most definitely impossible...

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On that same wiki it quotes, "Notch confirmed on the 11th of February 2011, during a Machinima Live stream,[1] that it is indestructible, or so solid that the amount of TNT it would take to destroy it would more than certainly crash the game, therefore the save file would show no evidence of the explosion ever happening.". Which actually seems to support SevenSidedDie's comment and contradict the previous paragraph. Furthermore the comment from Notch is cited while the "examination of Minecraft code" is not. –  Hooked Apr 10 '13 at 1:18
    
And also, Hooked, I never said ANYTHING about examining the code of masses of TNT, my point was that damage on a block does not add up, and are able to examine code to see that, because the game does not crash when multiple TNT explosions occur. –  AspiringGenius Apr 10 '13 at 1:44
    
I was there in person when Notch said that. He had stated that mining bedrock has a mining value of -1, which means that no matter how long you attack bedrock, it would never be mined. Explosions however from my experience do add up, as you can destroy obsidian with enough TNT. As Notch stated, no computer has enough computing power to create enough explosive power to break bedrock. –  Gigazelle Apr 10 '13 at 18:13
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Well, I love disputing this, but do you have any evidence? If you find a source, I would be more than happy to look at it, and FYI in the alpha days, you could mine bedrock. Look it up! –  AspiringGenius Apr 10 '13 at 23:10
    
Only TNT Minecarts have this capability. –  Timtech Aug 17 '13 at 15:25

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