RALEIGH (AP) _ North Carolina State Director of Athletics Jim Valvano announced Tuesday that football coach Dick Sheridan has signed a new contract that will keep Sheridan at the Wolfpack helm through 1993.

Sheridan had three years remaining on his original five-year pact. The new contract will stand for six years, with an option for five more years that could be picked up in 1992 if both parties agree.

''We feel very fortunate to have Dick Sheridan and his staff at N.C. State,'' Valvano said. ''We're pretty close on the type of image we want to bring to N.C. State. The two words that come to mind are class and dignity, and Coach Sheridan has certainly brought that to this university.''

Sheridan has a 12-10-1 record as the Wolfpack coach and an overall mark of 81-33-3.