Laserfiche WebLink
EXHIBIT M - GEOTECHNICAL STABILITY <br />This site consists of large marble waste blocks of up to 12' x 8' x 8' with some marble fines interspersed <br />around the blocks on slopes ranging from 1 H:1 V to 1.8H:1 V. <br />The large marble block piles have shown stability over their history, with a number of the large block <br />piles having been in place at Yule Quarry for over 80 years. The large size of the marble blocks means <br />that any pile of them does not behave like a typical earth slope. The maximum angle of repose of these <br />block piles is higher than the material's internal angle of friction for smaller size material. <br />The other primary source of slope instability is sediment flowing down the slopes underneath and <br />amongst the large waste blocks. However, with the installation of the sediment and runoff control <br />system shown in this permit applications sediment will not be flowing through the waste block piles. <br />Once mining and reclamation are complete, vegetation that is established will provide further slope <br />stability and runoff control. <br />The stability of the new Portal #5 and Portal #6 is addressed in the Mine Plan section on Pages 17 -19. <br />Yule Quarry January 2013 59 <br />