** Morningstar says explosives provider Orica's ORI.AX trading update is "pleasing"
** ORI said last week it expects earnings to be higher than last year across all of its segments
** Investment research firm says, however, co's shares are overvalued and flags longer-term demand headwinds
** "Long-term mining demand might not remain strong enough to justify Orica's expansion plans" — Morningstar
** Morningstar raises fair value estimate by 3% to A$18.50
** 13 of 13 analysts rate the stock "buy" or higher; their median PT is A$22.86 — LSEG data
** Stock up 26.9% this year, as of last close
(Reporting by Rajasik Mukherjee in Bengaluru)
((Rajasik.Mukherjee@thomsonreuters.com))