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• <br />6.2 Recommendations <br />This study has shown that it is possible to develop a set of mains under Terror Creek <br />without significantly impacting the stability of overburden rocks. The study also <br />identified changes in depositional environment to the west where some reduction in RQD <br />and in seam thickness is seen. <br />The following geotechnical activities are recommended for verifying the assumptions of <br />these analyses and for development of detailed designs: <br />• Additional drilling and core testing to determine triaxial strength properties of the <br />Upper B Seam. <br />is • Measurement of the far-field stress regime, preferably using a downhole <br />overcoring method. <br />• Design of prudent excavation and support techniques, including cut depth, entry <br />shape, support designs, timing of support installation, groundwater control, etc. <br />• Geotechnical monitoring of near-seam strata during development of the mains for <br />monitoring stability and support effectiveness. <br />• Monitoring overburden response during mining by analyzing results from TDR <br />measurements. <br />• Prudent longwall layout designs in the vicinity of the corridor. <br />C <br />Maleki Technologies, Inc. Page 36