Laserfiche WebLink
• STATUS REPORT ON GEO-TECHNICAL ANALYSIS <br />Subsequent to major mine bench failure, an inspection was made <br />on May 22, 1984 by Ken Myers of Rocky Mountain Geotechnical, Inc. of <br />Colorado Springs to review the problem and to discuss restabilization <br />possibilities. In our meeting with the Division on July 24, three <br />of the corrective preliminary designs were presented for the Division's <br />consideration. For this technical revision request, Blue Ribbon <br />wishes to define Option 111, pursuant to the July 24th meeting, as our <br />proposed plan for restabilization of the bench. This option re-estab- <br />lishes the bench to its original size by means of adding material to <br />establish a continuous slope of approximately 25o from the toe to the <br />bench. Final design for this proposal is dependent upon geo-technical <br />• information now being investigated. The information source is field <br />work done August 2-3, 1984, and work done previously on the bench. <br />The field work done August 2-3 consisted of the following: <br />4 borings near the outside edge of the bench; <br />2 borings near the center of the slope; <br />2 borings at the toe of the existing slope; <br />Z piezometers installed outside the toe of the proposed fill; <br />5 test pits dug; and <br />3 underground development waste samples taken. <br />hfap A and the accompanying drawings A-I, A-2, A-3, and A-4 show <br />typical cross sections of the present and proposed bench configuration. <br />More detailed maps and drawings will be submitted in Appendix 1-B. <br />The location of the borings and the piezometers are shown on the map. <br />• Test pits were dug near B-1, B-2, B-3, B-5, and B-6. <br />