| Summary: | This report deals with the second step in the project GRUVAN: the site inventory in operational mines. The main purposes of the inventory are: - To get a clear picture of the risks in the different mines. - To get a clear picture of the protective measures of each mine. - Optimize the choice of design fires for each mine. The site inventories were conducted through actual visits to the two LKAB mines in Sweden and through e-mail correspondence with LKAB personnel responsible for the different sections and areas. During the inventories, predefined forms for each type of item were used in order to facilitate the work. The following items were examined: - Combustible materials in general, for example large amounts of wood. - Vehicles - Cables - Fire barriers - Ventilation systems - Extinguishing systems Besides the above items, earlier fires and fire incidents were also examined. As the two LKAB mines are tremendously large with a large amount of equipment etc, only the most common vehicles were listed and examined further. Also, only the sites with the largest amount of cables and other combustible materials were listed. The following conclusions were made based upon the findings of the inventory: - With respect to earlier fires and fire incidents for the two LKAB mines, the most common causes and the causes to focus on are: electrical cause, flammable liquid or material on hot surface, hot works and equipment running hot. - Both the production area and the infrastructure part should be regarded in the future studies as fires are almost identically frequent in both areas. - When it comes to combustible material in general, the amount of combustibles seems to be more frequent in the Malmberget mine. In the Kiruna mine, the places with wood and conveyor belts seems to be interesting enough for further investigation. Even though self extinguishing conveyor belts means a limited fire in size, the amount of smoke emitted can be quite extensive. Also the storage of tyres at the contractor’s depots could be worthwhile ...
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