i need help with this zelda game twilight princess for wii.............?

Question

in the goron mines, i got to the big monster, but the door is locked. so how do u get the key and where is it?

Answer 1

Room 2

Head down the ramp to your left to find a Small Key in a chest. Head back up the ramp and jump across the rotating platforms on your way to the locked door leading to Room 3.

Answer 2

In the next room a Goron elder will greet you. His name is
Gor Amoto, and he'll give you a third of the Master Key that you
need to get into the boss room. Search the room to find a
treasure chest that hold the map inside. Climb the ladder and
walk around the path to the door that leads into the upper part
of the room you just came from. (On the way out, get Ooccoo, he's
in a pot up here)
Stick to the wall in here, and walk along the side of the
wall. Another tidbit about torch slugs, since they can walk on
walls and ceilings, they're going to get annoying on the cavern
ceiling. Across the wall there's a ledge to fall on. Unequip the
iron boots, and enter through this door. Hit a switch and get
sucked onto the ceiling. There's a piece of heart to be found at
the northwest corner of the room, and a miniature maze that can
be navigated using the minimap, that eventually leads the
walkable path on the ceiling to the northwest corner of the room.
This is hard to describe, but EASY to find, so for the first time
the explanation for finding this door will be poor. The path ends
in the western part of the room... when it does, drop down and
enter the door next to you.
The next room has giant rotating platforms held by cables
with magnets on the bottom of them. Upon entering the room there
should be a switch right in front of you. Step on it and stand
underneath the moving platform. The platform stops at specific
times, so find a time that it stops, and let it carry you to the
northernmost "stop" on the minimap, and fall off. Again, the
cycle repeats, and more monsters are standing around a switch.
Search for this huddle, take them down and activate the second
moving platform of its suction power. Stand underneath and let it
carry you to the stop that is closest to the northern door in
this room. Fall from the top and enter the next room.
This next room has some cool features, but for being a
dungeon primarily represented by fire, it is sporting the sweet
pools of water again. On the left side of the room on the minimap
is a place to sink with your iron boots, because underneath the
water's surface is a chest containing a small key. Open the
treasure chest, then move to the right side of the pool this
time. Sink a second time, and push the block out of the way you
can get behind the linked fence and search for the top of the
water. Upon climbing out of its depths, search for another
magnet. It will pull you to the ceiling again, at which point
Link will have to walk to the end, fall down onto the ledge and
mess with another switch. Upon doing so, a blue magnetic beam is
activated below the ledge, which means only one thing... put on
the iron boots and jump off of the ledge! It'll drag you to the
wall, to a path that is quite linear. Follow the path to the end,
and following routine thus far, fall off, hit a switch to open
the door nearby, and enter into the next room.
This next room is filled with beamos statues, something
from the days of the SNES. On the right side of the room is a
magnetic wall that splits at the top... the path on the right
side leads to a piece of heart, while the path on the left side
leads you to the next ledge Link has to fall to. Walk to the end
of the ledge and look for the rope holding a drawbridge up
against the wall. Cut the rope, and drop onto the bridge and the
door to the next room will be opened.
Link will find himself in a long hallway. As you move our
hero through the passages, flaming arrows will rain down from
overhead. Following the wooden barricade, there's a split in the
path. Run to your right to find a chest with a small key inside.
Head back to the path split and take the opposite route, which
leads to a locked door.
This next room is quite linear, and there really aren't any
other options in terms of directions to go in. There is one
special part of it though... remember the spinning platforms from
earlier on in the level? Well those are back again, but this time
they're much longer. Luckily for you and your boots, there are
magnetic patches on the platforms themselves. Run to each patch
and put your boots on. The platform will turn around with you
hanging upside down. Wait until the platforms realign themselves
before donning your normal boots and continuing to either the
next magnetic patch or the ledges on the far ends. At the very
end of this cavern-room, there's a door that leads to another one
of the elders, and indeed the second piece of the boss key.
There's also a chest in here filled with a stupid amount of
rupees. (10, if you're curious) Again, climb the ladder next to
the elder, wind your way around to the door in the back of the
room, and begin backtracking again.
After going through the door look for another patch of
magnetic material. Walk along it to the very end and drop down
for another chest of rupees and the door to the mini boss room.

-----------------
Mini Boss - Goron
-----------------

Like my generic names for the minibosses? Upon entering
this room, you'll immediately find that the platform you're
standing on moves. The goron, being of considerable weight, will
make the platform rock back and forth. Keep your iron boots ready
at all times, because at any moment the platform may slip to the
point where Link starts sliding into the lava.
The goron will approach you, and when he raises his guard,
attack his stomach. If you take too long he'll hit you and send
you flying. After hitting him, he'll start rolling around the
room. This is a good time to put on the iron boots... because
when he comes near, you can press A to stop him and throw the
boss into the lava behind you. Try to position yourself that when
he approaches, Link is standing fairly close to the edge and the
boss is rolling from the middle.
Besides trying to effectively use the iron boots and
regular footwear, this boss isn't too tough. After he gets tossed
into the lava three separate times, you win!

Go into the next room that opens up after the goron gets
his mind back. You'll find a chest filled with the Hero's Bow and
some arrows! Yay!
Looking around, you'll see a place on your map that is an
extension of the room you are in now. Blocking your path to
reaching the other half of the room is another drawbridge. Shoot
the rope of the drawbridge with your new toy, and cross it to
find a room of beamos statues. Shoot the "eyes" of the statues to
kill them. Now there are pullable statues in the left and right
sides of the room. The right side of the room contains a chest
with the compass inside, and the left side of the room has a door
behind the statue. Enter the door to find the last elder, who
commends your bravery and gives you the last piece of the boss
key.