OK, let's say you get your land mines.
What do you do when al-Qaeda starts stealing a page from the Viet Cong playbook? The VC just LOVED it when we laid minefields. That was where they got the material for their booby traps.
You shoot them. Remember as I've said in earlier posts the mines are in addition to increased border patrols. You simply shoot the invaders that don't get blown up by the mines. Remember this is war.