When I was in training (long time ago), my mentors pretty much told us to go around it (mine). But the reality is, mine fields are bigger than 100x200. As much as NATO do not like to admit, going through a heavy defended position has only one strategy. Bomb it, shell it, and take your time. Otherwise, the attacker will face heavy casualty.
Minefield and fortification do what it do best, slow a down push.
Then of course, there's this to greatly complicate a minefield.
It attacks from a radius of 50 meters, jumps and strikes from above. An MRAP designed to protect itself from land mines and IEDs from below isn't going to expect a strike from above.
Then there's this.
An MLRS style mine launcher that can quickly deploy mines ahead of any assaulting direction, or right at it's back, complicating the supply and retreat line of the attacking force. A mine field can be laid in minutes, which can be PTKM or the POM 2 below.
Anti personnel self deploying mine with sensors.
The mines are also networked so if something has begun to cross the minefield, the operator can be alerted. The entire mining field acts like a warning net of it's own, which can alert friendly forces to throw artillery, ATGMs, and FPV drones at the attacking forces to worsen their dilemma.. The Russians can also self destruct the mines if they wished if they are crossing the field or to deactivate the minefield entirely for safety reasons.