Which door are you referring to:
or
If it's the first one, and you've blown up the rolling Goron already... make sure that you keep talking to him, asking him both questions until he stops crying and opens the doors. If that doesn't work, try playing Zelda's Lullaby in front of the door. And if THAT doesn't work, you may need to get a Gameshark or similar cheating device in order to get past the door. The crooked cartridge glitch may also work if you're playing on an actual N64.
If it's the second one, you can just pull the statue back towards you and go behind it.