Three dumping sites have been formed at the northern region of Fushun City, Liaoning Province, for a large number of gangues including much oil shale that had been piled onto ground as gangue during long-term coal exploitation at West Fushun Open-pit Mine Three dumping sites have been formed at the northern region of Fushun City, Liaoning Province, for a large number of gangues including much oil shale that had been piled onto ground as gangue during long-term coal exploitation at West Fushun Open-pit Mine