Raise bores are tricky technology.

Here is an excellent explanation:

http://www.aditnow.co.uk/community/viewtopic.aspx?t=1383

Another example from an Italian company:

http://www.youtube.com/watch?v=N_A9irzSh4Q&feature=related

One more - a really large machine:

http://www.youtube.com/watch?v=wuLZcUkF55I&feature=related

The machine used in the Brown Stone mine had to be small enough to fit through the portal and adit; perhaps an Alimak machine.