How to open the door in Collapsed Tunnel?

[DallaPria2nd]

Hi, guys! Please, I need some help.

I've been running through all over the catacombs, but I can't seem to open the door to the top of Collapsed Tunnel. See the screenshots:

http://steamcommunity.com/sharedfiles/filedetails/?id=1250234482

http://steamcommunity.com/sharedfiles/filedetails/?id=1250234117


I searched for a video walkthrough on youtube, but the guy playing got to this door and it was already opened... I don't know how he did it.

Could anyone give me a hint?