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Showing: 1 to 10 of 189 matches for "face abutment loading"  Page   1   2   3   4   5   6   7   8   9  next TITLE Characterization of chain pillar stability in a deep western coal mine - A case study  SUMMARY ... borehole pressure cells, de- veloped by Panek and Stock (1967), wereemployed at each of the sites to determine the onset of abutment loading with face advance. ... AUTHOR DeMarco, M. J. ; Koehler, J. R. ; Lu, P. H. PUBLISHED 1987 TITLE Design Criteria of Longwall Face Supports  SUMMARY ... on the other hand could sustain the abutment loading without any ... b) HDrizontal stress The abutment zone follows a ... around tho face where the vertical stress is ... AUTHOR Singh, T. N., Dr. ; Singh, B., Dr. PUBLISHED 1982 TITLE Control of coal mine bursts  SUMMARY ... 370 m (1215 ft) along the tailgate entry and 90 m (295 ft) along the face. ... Mining should be scheduled between the seams so that active abutment loading is not ... AUTHOR Hammy, K. Y. ; Beckett, L. A. ; McDonnell, J. P. PUBLISHED 1987 TITLE Analysis Of Support And Strata Reactions In A Bump-Prone Eastern Kentucky Coal Mine  SUMMARY ... in identifying trends in pillar loading, yield-zone ... faceandcontinued to increase as the face approached and ... longwall panel from cxcessive side abutment loads. ... AUTHOR Zelanko, J. C. ; Rowell, G. A. ; Barczak, T. M. PUBLISHED 1992 TITLE Some Criteria For Longwall Selection  SUMMARY ... severe roof control problems between face supports and the coal face. ... it is a matter of statistical evidence that high side abutment loading develops over the ... AUTHOR Sharkey, Anthony PUBLISHED 1981 TITLE Prefailure Pillar Yielding  SUMMARY ... face subsidence. unintentional in the design. ... 5). The objective was to determine pillar loading before abutment loading from the longwall. ... AUTHOR Agapito, J. F. T. ; Goodrich, R. R. PUBLISHED 2003 TITLE The Effects of Backfilling on Ground Control and Recovery in Thin-Seam Coal Mining  SUMMARY ... immediate filling, takes place inside a forward abutment load. ... to set- up and stiffen before loading from the ... the miner moves back down the face and commences ... AUTHOR Donovan, James G. ; Karfakis, Mario G. PUBLISHED 2001 TITLE Optimum Mine Designs to Minimize Coal Blimps: A Review of Past and Present U.S. Practices  SUMMARY ... One method consists of increasing the gate entry pillar size, so that the pillars will prevent abutment load ride-over onto the active longwall face. ... AUTHOR Iannacchione, Anthony T. ; DeMarco, Matthew J. PUBLISHED 1992 TITLE Rock Mechanics Research Decreases Longwall Bump Potential At A Southern Appalachian Coal Mine  SUMMARY ... summarize significant periods of abutment-pillar loading and failure ... first key point is that the abutment pillars reach ... the 183-m (600-ft) face position during ... AUTHOR Barton, T. M. ; Campoli, A. A. ; Gauna, M. PUBLISHED 1993 TITLE Critical Pillar Concept In Yield-Pillar-Based Longwall Gate-Road Design  SUMMARY ... in the tailgate near the longwall face.This is the point at which a previ- ously successful abutment pillar is subjected to the great- est loading in the ... AUTHOR Koehler, J. R. ; DeMarco, M. J. ; Wuest, W. J. PUBLISHED 1997 Showing: 1 to 10 of 189 matches for "face abutment loading"  Page   1   2   3   4   5   6   7   8   9  next Search Again