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[MetalHead]

So I just breached my first cavern layer ever, and to my luck there's a giant magma pool right next to my breach point (not RIGHT next to it, close enough i can see the pool but not close enough for a dwarven hot tub).  I want to pump magma up about ~30-40 stories so my new forges are located kinda close to my existing stockpiles for some degree of convenience.  I've already designed a power system using windmills, my local brook, and waterwheels that has about 1k power before powertrain consumption with possible expansion room should I need it.

I also know(?) that magma doesn't obey pressure the same way water does but im still unclear on how exactly it works with the blood of armok.  So I have two questions:

1.) If i build a reservoir for magma storage say, 3 levels deep, and cut channels on the lowest level connected to my reservoir for forges, will i get overflow if I cut straight channels?  Or if I build it so there's a diagonal path to the forge area to eliminate pressure?  Or should I use floodgates (mag-safe of course)?

2.) For the magma source:  I read on the wiki that magma tube slowly refill over time back to their original depth, and my current plans have my magma 'draw' at 1 level below the surface like this:

_________________  <----open space layer
XXXXXXXXXXXXXXX[][] <---------magma w/ undug walls
XXXXXXXXXXXXXXX----------- magma and path to pump stack

If I want a large reservoir of magma stored immediately (say, with the reservoir having a slightly larger cross-sectional area than the origin pool) shouold i put the draw-point further down so i don't have to wait for it to refill?

[slothen]

1)  you're fine

[Haekel]

1)  you're fine

Let me elaborate:  Magma is viscous and therefore you don't need to alleviate the pressure by digging diagonally.

From the Wiki: "Without screw pumps to impart pressure, magma flows rather slowly (though no more slowly than unpressurized water)."

That said, if you dig into magma, make sure you don't do it from the same level.   While it IS rather slow, the slightest touch will MELT YOUR MINERS FEET. Work out the consequences yourself.

[rtg593]

Channel into the wall from beside an existing channel, it'll drop and your miner should have enough time to run away... Should being the operative word

Remove the upramp from against the magma pipe in that channel should stop the minerals from digging it from the ramp, use the dug tile next to it. Should improve his odds.

Lotsa should going on in that post, lol.

[Koremu]

Or dig the Magma reservoir & exit tunnels before you start pumping out your magma pipe

[MetalHead]

So if i pump magma into the reservoir i'll be fine if i throw a floodgate in the way or something? I mean if i pump directly into the reservoir btw.

Also thanks for the channeling advice.  All my miners are legendary in mining and another profession so i'd rather not lose them right now

[andyman564]

once you put magma through a pump stack, treat it as you would treat pressurized water.

[MetalHead]

Awesome, thanks for help with this guys.  I will post results if !!FUN!! occurs.

No word on the second part of the question though.  If I start that high in the pool, will my pump start sucking air before my reservoir gets filled?

[Frogwarrior]

You'll probably be sucking air before long. When I tapped the first z-level of the magme sea, I was sucking air pretty soon. Had to shut the pumps off and back on a few times.

[malroth]

Make a new pick,  give said pick to Ursit Mc immigrant Lyemaker and enable mining on him and  create a burrow that includes the channeling area as well as the escape route,  confine your new rookie miner to that burrow and your regular miners to somewhere safe. If the Rookie lives congratulations he is now a member of the guild of miners,  if he dies well you'll have magma soon so you'll be able to replace that pick fairly easily.