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Mining Publication: Stability Analysis of a Backfilled Room-and-Pillar Mine
Keywords: Mine design Pillars Room and pillar mining Support design and selection
Original creation date: January 1995
Authors: DR Tesarik, JB Seymour, TR Yanske, RW McKibbin
Report of Investigations - January 1995
Download PDF Document (0.73 MB)
NIOSHTIC2 Number: 20025284
U.S. Department of the Interior, Bureau of Mines, Report of Investigations 9565. NTIS stock number: PB95-251872, 1995 Jan; :1-20
Displacement and stress changes in cemented backfill and ore pillars at the Buick Mine, near Boss, Missouri, were monitored by engineers from the U.S. Bureau of Mines and The Doe Run Company, St. Louis, Missouri. A test area in this room-and-pillar mine was backfilled to provide support when remnant ore pillars were mined. Objectives of this research were to evaluate the effect of backfill on mine stability, observe backfill conditions during pillar removal, and calibrate a numeric model to be used to design other areas of the mine. Relative vertical displacements in the backfill were measured with embedment strain gauges and vertical extensometers. Other types of instruments used were earth pressure cells (to identify loading trends in the backfill), borehole extensometers (to measure relative displacement changes in the mine roof and support pillars), and biaxial stressmeters (to measure stress changes in several support pillars and abutments). Two- and three-dimensional numeric codes were used to model the study area. With information from these codes and the installed instruments, two failed pillars were identified and rock mass properties were estimated.
Image of publication Stability Analysis of a Backfilled Room-and-Pillar MineReport of Investigations - January 1995
Download PDF Document (0.73 MB)
NIOSHTIC2 Number: 20025284
U.S. Department of the Interior, Bureau of Mines, Report of Investigations 9565. NTIS stock number: PB95-251872, 1995 Jan; :1-20
See Also
Coal Bumps and Odd Dynamic Phenomena - A Numerical Investigation
Effect of the Dip and Excavation Orientation on Roof Stability in Moderately Dipping Stone Mine Workings
Field Observations and Numerical Studies of Horizontal Stress Effects on Roof Stability in U.S. Limestone Mines
Mistakes, Misconceptions, and Key Points Regarding Secondary Roof Support Systems
Multiple-Seam Mining Interactions: Case Histories from the Harris No. 1 Mine
Pillar Design Issues for Underground Stone Mines
Pillar Stability Issues Based on a Survey of Pillar Performance in Underground Limestone Mines
Roof Stability Issues in Underground Limestone Mines in the United States
Toward Pillar Design To Prevent Collapse of Room-and-Pillar Mines
Ventilation Planning Layouts for Large Opening Mines
Page last reviewed: September 21, 2012
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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