The Scottish Vacant and Derelict Land Survey 2012 provides information on previous uses: http://www.scotland.gov.uk/Publications/2013/01/2295/7#tb11. The site register: http://www.scotland.gov.uk/Topics/Statistics/Browse/Planning/Site-Register provides information on previous uses marked “Mineral activity – Coal” but these may include bings or other land at former deep coal mine sites as well as opencast sites.