Nothing happens to the Bank Account. Bank account is only affected when;
Your passport expires; because they have your passport information and they ask you to submit a copy of the renewed passport.
Your visa expires; since they have your visa copy and they know when it is going to expire and they again ask you for the renewed visa copy.
Again it varies from bank to bank. I had an employee who came to UAE after a couple of years when we gave him visa. He used his old account that was still running.
As far as transferring the funds is concerned, your ATM Card would still be functional. You can give it to someone who can do the transaction for you. Other than that, if you have internet banking, you can transfer it to some other account.
Which bank are we talking about btw?
Visa cancellation: The employer can cancel the visa in the absence of the employee. That's not an issue. It is not necessary that he have to put him in absconding to get the visa cancelled. It is not necessary that a ban is imposed on you. Even if there is a ban, it can be removed with a couple of methods.