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40d:How do I stop miners from falling in channels as they dig them

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This article is about an older version of DF.

This issue has been fixed in version v0.27.169.33g. If for some reason you still need it, the guide is below.

As of version v0.27.169.33g, it is possible that the reverse problem will happen if you have more than one dwarf digging a channel in a closed room - that is, that channels may be dug around a dwarf, leaving him trapped on a single tile hovering on the side of a room. The techniques below will still prevent this from happening.

Dwarves always begin with the northwest most tile and work their way south until all designations in that column are complete.

The simplest way to prevent this from happening is to turn off the mining of all dwarves save one. Here are some other, less restrictive solutions:

[edit] Overseer

Designate channels in single columns. Leave the miners room to escape. This is also a good way to prevent your miners from being isolated.

███.███ ███.███ ███████ ███.███
█.....█ █12721█ █12345█ █12151█
█.212.█ █12621█ █12346█ █21214█
█.212.█ █12521█ █12347. █12131█
█.212.█ █12421█ █12346█ █21212█
█.....█ █12321█ █12345█ █12121█
███████ ███████ ███████ ███████

[edit] Ramps

The total number of tasks required to complete this method is higher than the above one, but allows your dwarves to safely channel without you keeping tabs on them. Create stairs leading to the lower level at the entrance, designate ramps on the lower level, use the z-designate to remove those ramps, and finally channel the stairway on the original level.

Step 1            Step 2    Step 3
z0      z-1       z-1       z0
███.███ ███████   ███████   ███.███
█..>..█ █▲▲<▲▲█   █zz<zz█   █  _  █
█.....█ █▲▲▲▲▲█   █zzzzz█   █     █
█.....█ █▲▲▲▲▲█   █zzzzz█   █     █
█.....█ █▲▲▲▲▲█   █zzzzz█   █     █
█.....█ █▲▲▲▲▲█   █zzzzz█   █     █
███████ ███████   ███████   ███████

Alternate Step 1
z0      z-1
███.███ ███████
███>███ █▲▲<▲▲█
███████ █▲▲▲▲▲█
███████ █▲▲▲▲▲█
███████ █▲▲▲▲▲█
███████ █▲▲▲▲▲█
███████ ███████

[edit] Stairs

This method requires even more tasks overall to complete than the above one, but allows dwarves to safely dig multiple levels without supervision.

Step 1
z0      z-1         z-X     z-X-1
███.███ ███████     ███████ ███████
█>>>>>█ █XXXXX█     █XXXXX█ █<<<<<█
█>>>>>█ █XXXXX█     █XXXXX█ █<<<<<█
█>>>>>█ █XXXXX█ ... █XXXXX█ █<<<<<█
█>>>>>█ █XXXXX█     █XXXXX█ █<<<<<█
█>>>>>█ █XXXXX█     █XXXXX█ █<<<<<█
███████ ███████     ███████ ███████

Step 2
z0      z-1
███.███ ███████
█__>__█ █XXXXX█
█_____█ █XXXXX█
█_____█ █XXXXX█
█_____█ █XXXXX█
█_____█ █XXXXX█
███████ ███████

Step 3
z0      z-1
███.███ ███████
█  >  █ █__X__█
█     █ █_____█
█     █ █_____█
█     █ █_____█
█     █ █_____█
███████ ███████

etc.



Last Step
z-X-1
███████
█zz<zz█
█zzzzz█
█zzzzz█
█zzzzz█
█zzzzz█
███████


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