Search Results

Search Results for "yield pillar roof strength"

Search Again

Organization / Society AIME (197) AUSIMM (118) EPA (1) NIOSH (313) RMCMI (24) SAIMM (39) SME (609) USBM (1) All News Jobs Blogs Research

Showing: 1 to 10 of 2500 matches for "yield pillar roof strength"  Page   1   2   3   4   5   6   7   8   9  next TITLE Yield Pillar Design At Depth Based On Review Of Case Histories  SUMMARY ... Thus, the roof over the yield pillar gateroad system needs to have sufficient strength to transfer the load onto these abutments, but not be overly strong in ... AUTHOR Schissler, A. P. ; Badr, S. ; Salamon, M. D. G. ; Ozbay, U. PUBLISHED 2003 TITLE FDM Prediction Of A Yield Pillar Performance In Conjunction With A Field Trial  SUMMARY ... floor heave and reducing stress related roof falls [3]. The ... by widthheight ratio of the pillar, post-failure ... the yielding mechanism of a yield pillar could be ... AUTHOR Yavuz, H. PUBLISHED 2001 TITLE Yield Pillar Application Under Strong Roof And Strong Floor Condition - A Case Study  SUMMARY ... The maximu* tensile stress in the roof (Fig. 7) will exceed its tensile strength if the yield pillar is too small (<I5 ft.) and the roof will ... AUTHOR Tsang, P. PUBLISHED 1989 TITLE Pillar And Roof Bolting Design Under Conditions Of Weak Roof And Multi-Seam Interaction - A Case Study  SUMMARY ... The yield zone of the 50 ft pillar is about 14 ... seam mining but a minimum 50 ft wide pillar is recommended ... PLAN In the new mine, the immediate roof consists of ... AUTHOR Zhang, Y. Q. ; Heasley, K. A. ; Peng, S. S. PUBLISHED 2004 TITLE Plate Based Numerical Model for Mine Workings Design in Polish Copper Mine Conditions  SUMMARY ... conditions utilising the appropriate strength theories ... 1999) where the so called ‘roof deflection’ technology based on yield pillar mechanics has ... AUTHOR W Pytel PUBLISHED 2003 TITLE Chain Pillar Design For U. S. Longwall Panels  SUMMARY ... weak, while the "weak roof" stimu- lates the expansion of the yield zone in the pillar (Hsiung, 1984). Theoretically speaking, the strength of the roof is a ... AUTHOR Hsiung, S. M. PUBLISHED 1984 TITLE Automated Data Acquisition System For Remote Monitoring Of Pillar And Roof Deformation On A Longwall Panel  SUMMARY ... To accomplish this objective, a yield pillar located on the ... the relationShip between pillar strength and pillar shape. ... in a slot, cut between the roof and the ... AUTHOR Newman, D. A. PUBLISHED 1988 TITLE Applications Of The Coal Mine Roof Rating (CMRR) For Ground Control Planning And Operations  SUMMARY ... such as floor strength, applied load over time, the stage/timing of pillar yield, and of course, the structural quality of the immediate gate entry roof. ... AUTHOR Wuest, W.J. PUBLISHED 1995 TITLE Coal Pillar Strength Based On The Ground Reaction Curve ? A New Approach  SUMMARY ... important especially for the logical design of yield pillars ... the coal pillar strength limit, the pillar fails and the possibility of roof collapse increases ... AUTHOR Oraee, Kazem PUBLISHED 2009 TITLE In-Situ Pillar Strength Determination for Two-Entry Longwall Gates  SUMMARY ... Site 3 - A Yield Pillar ... The immediate roof was a sandstone channel; there was no ... This pillar reached its maximum strength shortly after development, with ... AUTHOR Maleki, H. N. PUBLISHED 1988 Showing: 1 to 10 of 2500 matches for "yield pillar roof strength"  Page   1   2   3   4   5   6   7   8   9  next Search Again