Here is a tour of my quarry, which automatically mines a designated area. This was build using the Buildcraft mod for Minecraft, which is a great little addition to the game by Spacetoad. The tour includes a description of the quarry, and I show you the power plant that runs the quarry as well as the smelting furnaces that process the raw, un-smelted blocks.
If you missed the videos for the construction, here they are:
Part 1: http://youtu.be/-3Ab77IjWMk
Part 2: http://www.youtube.com/watch?v=KJpLnYExqwA
More Buildcraft Videos: http://www.youtube.com/playlist?list=PLE470316C0C6AD1A4
Buildcraft Website: http://www.mod-buildcraft.com/