Oh....please don't let your babies go before 12 wks of age. Not only is it too young to leave mom prior to that (socialization), you will miss so much of their growth and development as well.
Weaning is tough but we never keep mom "completely" away from her babies ever even up into their 3-4 month range. (my yorkies are very protective mommy's and wouldn't go for that in the first place, lol) I can suggest you pour a little puppy milk or goat milk over their kibble to begin to get them off mom for good. Never give them cow's milk...it is not so good for them and is totally different from their mom's milk. Once your pups are eating a solid diet, Mom will dry up and she will discourage nursing all together. But always let them have their mommy in their life up until the day they leave your home for their new homes. Good luck to you!