most basic blues beat... right hand high hat 1 a 2 a 3 a 4 a while left hits the snare on 2 and 4 bass drum is on 1 and the a of 1 the a of 2 then 3 and the a of 3 and the a of 4. dont forget the essential fill of blues!!.. snare and floor tom together 1 triplet 2 triplet 3 triplet 4 triplet! http://www.drumsdatabase.com/index.htm#Blues
I have a book & CD by Zorro that's excellent. He's one of the top blues studio players. I don't remember whet the set is called, but it's got great descriptions and examples of just what you're looking for.
Here's a link to a blues band I was in not too long ago. You can hear a couple of blues/shuffle styles there.