mining program with turtle not moving forward

i having an issue with my program where the turtle will just sit in one place instead of moving forward that is stated in the program

i dont know if i am doing something wrong here but i can see any think wrong with my program here.

function DigTunnel(Int)
	torch = 0
	 while Int > 0 do
		 if turtle.detectUp() then
		   turtle.digUp()
		 end
		 if turtle.detectDown() then
			turtle.digDown()
		 end
		  while turtle.detect() do
			turtle.dig()
			 sleep(0.5)
		   end
		   if torch == 8 then
			   turtle.select(2)
			   turtle.placeDown()
			   torch = 0
			end
			   turtle.forward()
			   torch = torch + 1
			   Int = Int - 1
			end
end
DigTunnel(48)
turtle.turnRight()
DigTunnel(3)
turtle.turnRight()
DigTunnel(48)

Have you fueled the turtle?

yes it moves just in one place places a torch down then mines the torch then places it down again.

yes it was the fuel it was in the turtle just was not taking it on its own. no sleep does not help

Putting fuel items in the turtle's inventory isn't the same as fueling the turtle. Put the fuel items in the inventory by themselves, then run the refuel program.