This is a fairly easy trophy to unlock. First you need to make sure that you have the following unlocked in the skill tree:
Trip Mine (Combat)
Pull (Biotic)
Throw (Biotic)
Now what you want to do is, throw down a mine somewhere near some enemies. Use Pull to lift an enemy and pull them over to you. Next aim towards the mine you placed and use Throw. It will throw the enemy at the mine, detonating it and unlocking the trophy.