Sökning: "John Winlund"

Hittade 2 uppsatser innehållade orden John Winlund.

1. 1. Extraction of Backfilled Tailings in the Dannemora Mine – Economic Potential and Rock Stability Assessment

   Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

   Författare :John Winlund; [2022]
   Nyckelord :backfilled tailings; Dannemora mine; iron ore; rock stability; stopes; återfylld anrikningssand; Dannemoragruvan; järnmalm; bergstabilitet; öppna brytningsrum;

   Sammanfattning : The cut-off grade determines what rock mass are economic to mine. At the Dannemora mine, in eastern Bergslagen, Sweden, previously processed ore generated tailings (enrichment sand) with an iron content of 21-22 % that was backfilled into large open bodies (stopes) in the mine between 2013-2015. LÄS MER

3. 2. Hydrologisk och hydrokemisk studie om Trehörningen : En igenväxande sjö i östra Uppland

   Kandidat-uppsats, Uppsala universitet/Luft-, vatten- och landskapslära

   Författare :Christoffer Grunewald; André Hofstedt; John Winlund; [2020]
   Nyckelord :Hydrochemistry; limnology; overgrowth; mapping; phosphorus; nitrogen; Hydrokemi; limnologi; igenväxning; kartering; fosfor; kväve;

   Sammanfattning : Lake overgrowth occurs in many areas in Sweden, and it is often explained by elevated amounts of nutrients. The overgrowth results in a changed local environment for both communities and ecosystems. In this project the lake Trehörningen, near Spersboda in Norrtälje municipality, has been examined regarding an ongoing overgrowth process. LÄS MER