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[krumlink]

"You can't take the Mountain to Mohammed"

That is a good quote, but not in Dwarf Fortress world. I want to remove a 5 z level high mountain, and what is your suggestion to quickly and speedily remove a mountain?

[Jude]

I believe you could undermine the entire bottom layer and cause it to collapse - I've never tried this but I'm pretty sure when stuff caves in the actual "land" vanishes and turns into stone (as in, what immigrants haul). Give it a try and let us know if it works.

Otherwise, just strip mine the whole thing away starting at the top.

[inaluct]

Tunnel out every level and then collapse it. I think it you don't it might just stay solid.

[puke]

constructed materials turn into stone or blocks or whatever you built them out of.  so a constructed human castle turns into a pile of blocks.

natural stone just falls straight down.  mountains and goblin forts and such are carved out of raw stone, and not constructed.  they maintain their structure and just get lowered a level, or however far you dropped them.

i think if you carved out up/down stairs through the whole mountain and then undermined the bottom layer, it would all collapse into nothing.

[sneakey pete]

Ramp's. they remove the floor and tile above them. Just be careful: if there's a tree or smoething that can't be removed, the floor stays. so un-suspended floors can happen. And then collapse on your dwarves. killing them instantly.

[Wolfius]

Ramp's. they remove the floor and tile above them. Just be careful: if there's a tree or smoothing that can't be removed, the floor stays. so unsuspended floors can happen. And then collapse on your dwarves. killing them instantly.

Also, you'd probably be left with ramps sitting in open fields where bits were isolated befor being carved, so you might want to channel the last level out.

And expect a frakton of stone. Good training, but then I turned a 4-5 level mountainside into a cliff for defence purposes, it generated, oh, probably 8000+ stone. Your project sounds alot larger.

[Alex Encandar]

Step 1: De-Tree the top layer
Step 2: Carve ramps on 2nd layer from top
Step 3: Remove ramps

Repeat 5 times


It's probably safest if you turn off cave-ins while you are excavating.

[John Johnston]

I would first construct a large perimeter wall around the bottom of the mountain, to prevent the miners and stone-haulers from being done to death by goblins.  I don't do the mining with ramps thing, so I then designate channels on the top level, starting with a small patch in the centre and working outwards in a series of circles until the whole top was channeled out.  Then I'd do the same on the freshly-exposed area, rinse, and repeat until the mountain was gone.

[ikkonoishi]

Make the top level of the mountain look like this

>>>>>
>>>>>
>>>>>
>>>>>
>>>>>

Make the middle layers of the mountain look like this.

XXXXX
XXXXX
XXXXX
XXXXX
XXXXX

Make the bottom layer look like this.

<<<<<
<<<<<
<<<<<
<<<<<
<<<<<

Once that is done start from the top and channel out each layer till you reach the bottom. Remove the up stair cases on the bottom layer and you are done. I don't think there is any way for the dwarves to kill themselves using this method.

[Magua]

Mine (not channel) out each level, leaving one square undug for support -- each square should be in a different X,Y location.  End result should be five floors, with one undug square on each floor, none of the undug squares above another.

Put support on bottom floor.  Dig out last square on bottom floor.  You should now have four floors with an undug square, and the fifth bottom floor with a support.

Link support to lever.  Make sure area is clear.  Pull lever. 

The floors should disappear in the collapse, leaving you only four undug squares, which are easily removed.

[Drunken]

Collapsing is dangerous, I usually use ramps for a project like this. If you just carve up ramps on the top level and then the next level down etc they should dissapear automatically except for the bottom layer.

[Ivefan]

Actually, i've had more collapses from ramping large areas then i did when just digging and the collapsing the floor tiles.
So i suggest you to do like Magua says

[Magua]

Collapsing is dangerous, I usually use ramps for a project like this. If you just carve up ramps on the top level and then the next level down etc they should dissapear automatically except for the bottom layer.

Carving ramps will work, unless there are trees (and perhaps boulders?) on the mountain, in which case carving an up ramp does not remove that floor tile that the tree is on.  If that floor tile is then surrounded by ramps only, it will collapse.

If you don't have trees (and boulders?) then carving up ramps should be safe, as long as you do it only one layer at a time.

[Hague]

Boulders do not inhibit ramp digging, only structures and trees.

Ramps are the most efficient way of strip-mining. Assuming you've removed all trees you can designate the entire area for ramps and then remove the stubborn ones that don't disappear for not having an wall to lean against. Don't worry about the stone, it'll move down to the next lowest level when the ramp is dug.