Its chairman Bob Kamandanu decided to step down only weeks ahead of a vote proposed by largest shareholder Samin Tan to replace most directors and take the reins at the company.
Before the infamous Soma disaster, which claimed the lives of 301 workers, there had been 1,308 fatal accidents in the industry since 2000, a new report shows.
December 2014 coal markets were mixed on the month, with eastern coal caught in the rout that has broadly affected energy commodities on slowing global economic growth and weak winter demand.