Good to hear that you have lodged a WC claim and as plenty of others have already said it will cover you for expenses, lost wages etc.
Don't be too concerned at this stage (however document every conversation in a diary) about the boss making these statements as if he does you will be able to commence unfair dismissal. There are rules around employers providing suitable duties (which they have been for you up until now) and there are timeframes set down for WC claims and recovery processes. There are multiple legal precedences whereby an employer has been providing duties for a period and then all of a sudden says can't do it and sacks the person. They have basically all invariably lost when it has been taken further down the legal path.
As said above document every injury / employment conversation in a diary as I would reckon that the employer would not be smart enough to as this is all admissible in court. If the employer tells WorkCover that they no longer can support suitable duties for you then WorkCover have the option of re-housing you at a host employer who can which is fully funded.
The above is a summary only and if you start to feel real pressure from the employer you should also discuss with your WC case manager which will then ensure that there is another chain of documentation. Should also note that you need to ensure that you participate in all treatment and reviews etc as refusal to do any of these can be used to demonstrate that you are not looking to get better and are milking the system.
Cheers
Rod