Miner 1.0 (Not Tested)

function main()
    term.clear()
    term.setCursorPos(1,1)
    print("Tunnel Miner 1.0")
    print("Tunnels will be 47 blocks deep")
    print("13 tunnels will be mined")
    tunnel()
end

function tunnel()
    for w = 1,12 do
        turtle.select(1)
        refuel()
        for t = 1,47 do
            while turtle.detect() do
                turtle.dig()
                sleep(.5)
            end
            while turtle.detect() do
                turtle.digUp()
                sleep(.5)
            end
            turtle.forward()
        end
        turtle.turnRight()
        turtle.turnRight()
        for t = 1,47 do
            turtle.forward()
        end
        while turtle.detect() do
            turtle.dig()
            sleep(.5)
        end
        turtle.up()
        while turtle.detect() do
            turtle.dig()
            sleep(.5)
        end
        turtle.down()
        turtle.select(16)
        turtle.place()
        for r = 1,16 do
            turtle.select(i)
            turtle.drop()
        end
        select(1)
        turtle.dig()
        newTunnel()
    end
    turtle.turnRight()
    while not turtle.detect do
        turtle.up()
        turtle.forward()
    end
    turtle.dig()
    turtle.forward()
    turtle.digDown()
    turtle.down()
    turtle.turnRight()
    turtle.turnRight()
end

function newTunnel()
    turtle.turnRight()
    for e = 1,4 do
        while turtle.detect() do
            turtle.dig()
            sleep(.5)
        end
        while turtle.detect() do
            turtle.digUp()
            sleep(.5)
        end
    end
    turtle.turnRight()
end

function refuel()
    if turtle.getFuelLevel() < 650 then
        term.clear()
        term.setCursorPos(1,1)
        print("Tunnel Miner 1.0")
        print("")
        print("Turtle does not have enough fuel for entire job.")
        print("Please dispense fuel and press SPACE")
        local event, key = os.pullEvent("key")
        if key == keys.space then
            for i = 1,16 do
                turtle.select(i)
                turtle.refuel()
            end
            main()
        end
    elseif turtle.getFuelLevel() => 650 then
    end
end
main()