yes go to computercraft.info and look for a thread by austinkk, his script (and others do most likely) will have the turtle look at ores above and below it, and grab/mine anything that is not stone or dirt. so you only end up with stone that the turtle absolutely had to mine, which is 1/3 of the stone you would get from a quarry.
i use for of these spread around in a square, each at one corner, set to mine 30 x 30 each. it mines an area like a quarry, but with less stone, less damage to the land (also very easy to run this underground, no landmarks to set up, no lost ores like a quarry would give underground) in less time, and uses less energy.
Yep, I've ran this program. Works great, just make sure and chunkload the area the turtle will be mining. It is actually faster than a full speed quarry.
Here is the link to AustinKK's thread: http://www.computercraft.info/forum...ced-mining-turtle-ore-quarry/page__hl__austin