I was thinking about land mines a little while back, and the whole idea of trying to cover an area and needing so many is what put me off at first...
And then! It's bulky and cumbersome, but a flat piece of...something...
a couple feet in each direction laid on top could solve that....make it seperate so you lay the mine then place the "thing" on top and conceal.
Of course, it'd be a pregame set up thing....unless you've got the volcano latched onto the side of a helo it's not a good idea to deploy a mine field in the middle of combat anyway.
That way 3-4 mines could cover a better area....and when staggered in placement...They might make it past the first one but very likely to hit the next unless you didn't conceal well....Daisy chain it to remove a squad :O
At any rate, I think land mines could lead to some additional fun in games, and possibly a new slant to some scenarios.