Hi there, and welcome.
All that history really isn't pertinent to the basic problem, which is that your wife is an alcoholic and your life has become unmanageable.
I'd really suggest finding an Al-Anon meeting and getting started with that. Learn all you can about alcoholism--not so you can get her sober (because you can't) but so you understand what it is you're dealing with.
This isn't a simple "fix"--does she have any interest in quitting drinking? If not, she will continue to drink and her life will continue to get worse. You can do something about the effects it has on YOU, however. Al-Anon can help you get your head on straight so you can make the best choices for your own future, and that of your kids.
I'm not sure how old your kids are, but there is also Alateen for them, to help them with the impact their mom's drinking (and their dad's coping strategies) have had on them.
Stick around--this is a great place for support and knowledge. You might want to start by reading the "sticky" threads up top.