just go above or below the mines. z-axis control for the win. Most people don't take the time to place their mines in a 3d manner.
And this is why all mines need to "home" in Z-axis. Honestly I consider this (and most other Z-axis usages) a form of abuse. The game is theoretically 3D, but in practice it's played mostly in two dimensions, while the third is automated for pathing purposes.