Rio Tinto approves development of Oyu Tolgoi underground mine Post author:Rio Tinto RSS Feed Post published:May 6, 2016 Post category:Coal Mining / Mining / Rio Tinto Post comments:0 Comments You Might Also Like Rio Tinto's Argyle Pink Diamonds Tender delivers exceptional results October 28, 2014 Enterprising ideas offered to Upper Hunter entrepreneurs and business owners October 27, 2014 Bengalla employee wins best manager award October 30, 2014 Leave a Reply Cancel replyYou must be logged in to post a comment.