Search Results

Search Results for "mains pillars"

Search Again

Organization / Society AIME (60) AUSIMM (58) NIOSH (143) RMCMI (3) SAIMM (5) SME (245) All News Jobs Blogs Research

Showing: 1 to 10 of 514 matches for "mains pillars"  Page   1   2   3   4   5   6   7   8   9  next TITLE Investigation of the causes of roof falls in a deep underground coal mine  SUMMARY ... stress field is considered to be responsible for the roof falls, pos- sible mining alternatives include: Adopting larger pillars in the 1 Right mains. ... AUTHOR Su, W. H. ; Peng, S. S. PUBLISHED 1987 TITLE Stress Issues Impacting Design And Stability At OCI Wyoming’s Big Island Trona Mine  SUMMARY ... confirmed (1) that the 38- KPa/m (1.69-psi/ft) depth gradient, measured in 2000, was due to time-dependent load transfer from the large mains pillars, and (2 ... AUTHOR Agapito, J. F. T. ; Gilbride, L. J. ; Hollberg, K. PUBLISHED 2004 TITLE Long-Term Stability for Two-Seam Mining at OCI's Big Island Mine  SUMMARY ... width Panel pillars Room widths Crosscut spans Barrier pillar widths Mains pillars Mains entry widths Figure 7 shows the interburden ... AUTHOR Agapito, J. F. T. PUBLISHED 1999 TITLE Toward Pillar Design to Prevent Collapse of Room-and-Pillar Mines  SUMMARY ... Pillars in the mains were 12 by 18 m, and panel pillars were 9 by 18 m. The panel pillars were mined with a 6-m-wide split, leaving 6- by 9-m stumps having a ... AUTHOR Zipf, R. Karl, Jr. TITLE Field Evaluation Of Mobile Roof Support Technologies  SUMMARY ... lies directly under the 1st Main North, but shifts some 24 m (80 ft) toward the east and so the last (most westerly) row of 1st North Mains pillars is not ... AUTHOR Maleki, Hamid ; Owens, John ; Endicott, Marc TITLE An Engineering Analysis Of "Squeeze" Failure Of Pillars In The Pittsburgh Coal Bed  SUMMARY ... units finishing up in the C. Mains area of the mine. The section was driven in accord- ance with an approved plan for splitting the old pillars lengthwise and ... AUTHOR Mishra, George PUBLISHED 1981 TITLE Evaluation Of Mobile Roof Support Technologies  SUMMARY ... panel lies directly under the 1st Main North, but shifts some 24 m (80 A) toward the east and so the last (most westerly) row of 1st North Mains pillars is not ... AUTHOR Maleki, Hamid PUBLISHED 2001 TITLE Cable Bolting - Potential Applications For Variable Strata Conditions  SUMMARY ... wide by 105 ft. long (actual ). Entry widths are 20 ft. Stable pillars in the mains are 150 ft. wide by 230 ft. long (actual). In ... AUTHOR Allen, David PUBLISHED 1994 TITLE The Effect Of Atmospheric Pressures On The Oxygen Level In A Sealed Mine  SUMMARY ... 3) and advanced upgrade at 1 pct. Butt headings were driven to the left and later to the right of the mains. Pillars of coal 76 ft ... AUTHOR Moebs, N. N. PUBLISHED 1972 TITLE Current Practice Of Pillar Design In US Coal Mines  SUMMARY ... In the mains, square pillars with di- mensions ranging from 12 to 14 m ... A wide scatter of the safety lictors for the pillars in mains and rooms warrants a ... AUTHOR Tsang, P. ; Peng, S. S. ; Biswas, K. PUBLISHED 1997 Showing: 1 to 10 of 514 matches for "mains pillars"  Page   1   2   3   4   5   6   7   8   9  next Search Again