Mr. Legal Mustache's short answer: NO.
Minn. Stat. 176.82 specifically prohibits this behavior. An employer cannot fire you or even threaten to fire you for the mere fact that you sought Work Comp after an injury. Nor can they "intentionally obstruct" you from seeking Work Comp. In fact, if your boss tries to do any of this, feel free to tell him he can be liable in a civil action. In addition to damages, you can be awarded costs and attorney fees, and even punitive damages of up to 3x the amount of Work Comp benefits you are entitled to. The icing on the cake: these civil damages will not be offset by your Work Comp benefits.
Whenever you get hurt at work, you should hire an attorney. You don't have to pay anything up front; you only pay if you win! So why deal with these kinds of things on your own? If you hurt yourself at work, give me a call to see if you have a claim.