[Hunpecked]

Suicide Junkie writes:

"You can even set things up such that players will have to place their mines not just stacked way up on the warppoints, but spread across a number of sectors around the warppoints and planets."

The whole problem with the concept of "mines" in a space game is

Space is big. Really big. You just won't believe how vastly, hugely, mindbogglingly big it is. I mean you may think it's a long way down the road to the chemist, but that's just peanuts to space. -- HHGTTG

Now with enough mental gymnastics you might be able to rationalize effective minefields around "choke points" like warp points or planets, but in interplanetary space, forget it.