Currently I don't like how blast charges work, I think it would be more realistic and balanced if they were landmines with a timer and that you could adjust and a 1 square activation radius around the mine. You could even do powered landmines that if not powered would not trigger. This could work nicely with my Code Green/Yellow/Red Idea in this other post.
http://ludeon.com/forums/index.php?topic=5198.0
Basically Code Yellow and Green do not power turrets (and maybe landmines), while Code Red would power them. May also need to have a Forbidden Zoning area for colonists and allies to avoid during Code Red so they don't trigger one. Just to avoid accidents maybe have a 10 second powering delay to the mines, could be adjustable.
http://ludeon.com/forums/index.php?topic=5198.0
Basically Code Yellow and Green do not power turrets (and maybe landmines), while Code Red would power them. May also need to have a Forbidden Zoning area for colonists and allies to avoid during Code Red so they don't trigger one. Just to avoid accidents maybe have a 10 second powering delay to the mines, could be adjustable.