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Quantitative methods for evaluating compaction in mine reclamation : A review and case study

British Columbia Mine Reclamation Symposium; University of British Columbia. Norman B. Keevil Institute of Mining Engineering

Compaction of growing media is commonly cited as a barrier to recovery in mine reclamation, and best practices include a variety of methods to avoid and mitigate compaction. Many British Columbia Mines Act permits include a clause that requires mines to “conduct research to assess decompaction methodologies to ensure that the severity of compaction that exists prior to commencing reclamation activities is effectively addressed.” However, compaction is difficult to assess with respect to effects on vegetation establishment and growth, and is thus rarely measured quantitatively for this purpose. Yet quantitative compaction assessments are necessary to evaluate whether compaction is present and needs to be addressed through site preparation or decompaction prior to revegetation. This paper reviews measures and associated methods for monitoring compaction in reclamation, including bulk density, relative bulk density, and mechanical resistance, and presents a literature review of values that limit root growth to provide general guidelines for operational use. A case study applying these compaction measures to a research trial at a mine in Western Canada is presented, showing the effects of different material types, construction methods, and site preparation methods on compaction. Compaction monitoring results are related to first-year survival of planted seedlings.

Conference Paper

eng

Vancouver : University of British Columbia Library

10.14288/1.0447210

Non UBC

Other

DSpace