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Showing: 1 to 10 of 825 matches for "yield pillar soft rock"  Page   1   2   3   4   5   6   7   8   9  next TITLE Early shaft reef removal at Beatrix No. 3 Vertical Shaft  SUMMARY ... was designated as a “no non- yield pillar” zone to ... mine out fault-losses and reduce pillar dimensions where ... of soft cement based packs and soft cement foam ... AUTHOR Klokow, J. W. ; Mulder, S. L. PUBLISHED 2003 TITLE Prefailure Pillar Yielding  SUMMARY ... References Abel, JF, 1988, "Soft rock pillars," International Jolrnal ... and Hunter, RV, 1989, "Rock mechanics pro ... and Walker, A,, 1949, "Yield pillar tech- nique ... AUTHOR Agapito, J. F. T. ; Goodrich, R. R. PUBLISHED 2003 TITLE Stress Control Method Applied To Stabilization Of Underground Coal Mine Openings  SUMMARY ... the entire time-dependent process of room excavation, yield pillar failure, and ... properties of complex ground, such as weak seams, soft rock, and fractured ... AUTHOR Serata, Shosei PUBLISHED 1984 TITLE Stress Control Method Applied to Stabilization of Underground Coal Mine Openings  SUMMARY ... the entire time-dependent process of room excavation, yield pillar failure, and ... properties of complex ground, such as weak seams, soft rock, and fractured ... AUTHOR Serata, Shosei PUBLISHED 1984 TITLE FDM Prediction Of A Yield Pillar Performance In Conjunction With A Field Trial  SUMMARY ... unknown field properties of the pillar material and caved rock from known ... capability of a finite difference model for two entry yield pillar applications is ... AUTHOR Yavuz, H. PUBLISHED 2001 TITLE Discussion – Roof-Control Problems and Supports in a Coal Mine – Mining Engineering, Vol. 43, No. 8, pp. 1062-1065 – Khair, A. W. and Peng, S. S.  SUMMARY ... And if the coal is so soft, and if it is ... cross-cuts resulted in yielding of the pillar ribs and ... pressure of the retreat Iongwall face the yield zone extended ... AUTHOR Parker, J. PUBLISHED 1991 TITLE Ground Control and the Inundation of the Retsof Mine  SUMMARY ... part of our assessment, we also determined if the yield pillars at Retsof can fail in this manner. Our assessment applies Wilson's''' soft rock pillar equation ... AUTHOR Scovazzo, Vincent A. PUBLISHED 1997 TITLE Pre-Failure Pillar Yielding  SUMMARY ... Although a yield pillar is often regarded as a ... Three examples are described where pillar loads 25 ... REFERENCES Abel, JF, 1988, "Soft Rock Pillars," International ... AUTHOR Agapito, J. F. T. ; Goodrich, R. R. PUBLISHED 2001 TITLE Discussion - Roof-Control Problems And Supports In A Coal Mine  SUMMARY ... And if the coal is so soft, and if it is ... cross-cuts resulted in yielding of the pillar ribs and ... pressure of the retreat longwall face the yield zone extended ... AUTHOR Khair, A.W. ; Peng, S. S. PUBLISHED 1992 TITLE Computer Modelling And In Situ Instrumentation Techniques: A Quantitative Approach To Scientific Mine Design  SUMMARY ... The optimum yield pillar width for a 3-entry may not ... squeeze or sur- face subsidence, pillar swelling,etc ... have been found preferable in soft rock applica- tions ... AUTHOR Gardner, Bruce H. PUBLISHED 1984 Showing: 1 to 10 of 825 matches for "yield pillar soft rock"  Page   1   2   3   4   5   6   7   8   9  next Search Again