The Commonwealth Court shall have power to issue, under its judicial seal, every lawful writ and process necessary or suitable for the exercise of its jurisdiction and for the enforcement of any order which it may make, including such writs and process to or to be served or enforced by system and related personnel as the courts of common pleas are authorized by law or usage to issue. The court shall also have all powers of a court of record possessed by the courts of common pleas and all powers necessary or appropriate in aid of its appellate jurisdiction which are agreeable to the usages and principles of law.