Nov 2 (Reuters) - Australia's Orica Ltd ORI.AX , the world's top supplier of commercial explosives, said on Friday annual underlying profit fell 16 percent, hurt by unplanned maintenance shutdowns as well as operational issues at the Burrup plant.
Underlying profit, a measure of earnings that excludes one-off gains and losses, fell to A$324.2 million ($233.55 million) for the year ended Sept. 30 from A$386.2 million a year ago.
The company declared a final dividend of 31.5 Australian cents per share, up from the 28 cents per share a year earlier.
($1 = 1.3881 Australian dollars)