Insufficient exploration of landfill sites directly affects the accurate assessment of gaps or errors in mine design, which carry high risks and potential consequences from unwanted events. In order to develop a procedure for forming a risk model for mining systems at landfill sites, it is necessary to analyze the examples of terrain destabilization and resulting consequences, such as damage to machinery, for instance. Accidental cases recorded during the period from 2014 to 2021 are encompassed by the analysis. Clear guidelines for reducing professional speculation, concealing employee injuries, or costs incurred during accidental events at landfill sites will be provided in the conclusion.