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~~ <br />' material and colluvial materials encountered on the slope. The <br />J~~ <br />resulting effective stress strength parameters provided by these <br />tests are shown on Table 1 and Table 2. <br />i- <br />JJ The effective stress paths and stress-strain relationships for <br />J <br />the tests are provided in Appendix A (Figures A-18 through A-25). <br />j In addition, direct shear tests conducted during previous <br />_ investigations are included and shown on Figure A-26. The <br />1 stress-strain relationships are plotted in terms of the effective <br />J principal stress ratio versus axial strain. When the effective <br />principal stress ratio reaches a maximum value during each stage, <br />J the loading is stopped and the sample is reconsolidated at a <br />higher effective confining pressure. Effective confining <br />pressure (cell pressure minus back pressure) of 6, 15 and 30 psi <br />J were used for the three stages. The rate of axial deformation <br />- ranged between 1.6 and 17.8. <br />I ^ <br />3.6 CHEMICAL ANALYSIS <br />I At the request of Blue Ribbon Mine personnel, coal waste was <br />I evaluated for chemical content pursuant to applicable <br />Regulations. The results of tests on the various samples of the <br />I coal waste materials are provided on Table 3. <br />I No specific evaluation of these chemical tests are discussed, <br />^ since these go beyond the scope of the analysis and <br />investigations by Rocky Mountain Geotechnical. The results are <br />I presented for completeness and for evaluation by parties as <br />required. <br />_~ <br />1 14 <br />i <br />