It seems that without hacking and/or lockpicking you are unable to open the door (and the others) that leads to the keycard (Maria Hope keycard) to open the gate to tchort, at wiki it seems there are vents but I can't find any ventilation shafts outside the rooms, every door is locked and I'm unable to progress any further.
EDIT: Nevermind, there is a key to open the door, for those to want to know is located by going to the left transition area and loot a skeleton there.