Do not know about HIA in particular, however, a consolidation just reduces the number of shares on issue by a specified ratio and changes the par value to leave the company book value the same.
In a 2:1 consolidation, if you owned, for example, 2000 shares, your share holding would reduce to 1000 post consolidation.
All cases behave slightly differently, however in theory the market price would double and the value of your stay the same.