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The National Institute for Occupational Safety and Health (NIOSH)





Mining Publication: Application of Ground Penetrating Radar to Evaluate the Extent of Polyurethane Grout Infiltration for Mine Roof Control: A Case Study
Keywords: Ground penetrating radar Roof falls
This page is archived for historical purposes and is no longer being maintained or updated.
Original creation date: August 2004
Authors: WD Monaghan, MA Trevits
Conference Paper - August 2004
Download PDF Document (1.03 MB)
NIOSHTIC2 Number: 20026677
In Peng-SS; Mark-C; Finfinger-GL; Tadolini-SC; Heasley-KA; Khair-AW, eds. Proceedings of the 23rd International Conference on Ground Control in Mining, Morgantown, West Virginia, August 3-5, 2004. Morgantown, WV: West Virginia University, 2004 Aug; :197-204
During 2000-2003, roof falls accounted for 4% to 14% of the fatalities in U.S. underground mining operations. NIOSH is conducting research to reduce the frequency, exposure, and risk of these events through an ongoing program of field and lab studies. One area of research involves the evaluation of polyurethane grouting technology that is commonly used to stabilize fractured mine roof strata. Concurrently, NIOSH is conducting work to evaluate the application of ground penetrating radar (GPR) for advanced delineation of problematic mining areas. In this study, NIOSH partnered with Sub-Technical, Inc., who injected a polyurethane grout (also known as glue) into a roof area of NIOSH's Safety Research Coal Mine. The mine roof area was scanned using GPR technology before and after grout injection in an attempt to determine the extent of grout infiltration. A comparison of the pre- and post-grouting radar records showed a significant change at a mine roof depth of about 4-5 ft. The interpreted radar records were then compared with drill core information, borescope evaluation of roof bolt holes in the study area, and underground observations. At this site, the interpretations of the radar records correlated with data obtained from the coreholes, borescope evaluations, and underground observations. The study showed that GPR technology can be a useful tool for detecting changes in mine roof due to the injection of the grout.
Image of publication Application of Ground Penetrating Radar to Evaluate the Extent of Polyurethane Grout Infiltration for Mine Roof Control: A Case StudyConference Paper - August 2004
Download PDF Document (1.03 MB)
NIOSHTIC2 Number: 20026677
In Peng-SS; Mark-C; Finfinger-GL; Tadolini-SC; Heasley-KA; Khair-AW, eds. Proceedings of the 23rd International Conference on Ground Control in Mining, Morgantown, West Virginia, August 3-5, 2004. Morgantown, WV: West Virginia University, 2004 Aug; :197-204
See Also
Advance and Relieve Mining: A Method to Mitigate the Effects of High Horizontal Stress on the Mine Roof
Assessment of Ground Conditions Near a Mine Portal Using Ground Penetrating Radar
Diagnosing and Controlling Moisture-Sensitive Roof in Coal Mines
Dynamic Failure in Deep Coal: Recent Trends and a Path Forward
Make it Safer with Roof Screen
Optimizing Secondary Roof Support with the NIOSH Support Technology Optimization Program (STOP)
Overview of Coal Mine Ground Control Issues in the Illinois Basin
Preventing Falls of Ground in Coal Mines With Exceptionally Low-Strength Roof: Two Case Studies
Roof Screening: Best Practices and Roof Bolting Machines
Technology News 483 - Safety Training Tools for Rock Scaling Personnel
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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