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1.0 TAILINGS PHYSICAL CHARACTERISTICS <br />• Several physical parameters need to be identified in order to <br />properly design a disposal facility to contain the tailings. One of the <br />key parameters to determine is the range of density values that the <br />tailings will attain. This parameter is dependent, during operation, on <br />several variables which are controllable by the method in which deposition <br />occurs. <br />Two types of test have been performed to study the behavior of the <br />tailings. These are column settled density test and a tailings box <br />methodology used to deposit the tailings. <br />1.1 Tailings column Settled Density Test <br />Two columns were used for this testing. The first column was <br />set up to allow drainage to occur in two directions, top and bottom. <br />The second column did not allow drainage to the bottom. Both columns <br />were set up to allow a total of three lifts to be deposited. Each <br />• lift was deposited at or near to 50 percent solids content. <br />Measurements were made while the solids were settling. Values <br />of density versus time as well as density versus load application <br />were calculated. These results are presented in Appendix A attached <br />to this report. <br />1.1.1 No Bottom Drainage Column <br />The height of the column used is twelve (12) inches. <br />Since the tailings liquor in this column accumulates at the <br />top of the tailings, there is a limit as to the total amount <br />of tailings slurry that can be placed in the column. The <br />quantity of material placed in this column was calculated such <br />i <br />