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Publications tagged with [roof bolts]

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The San Juan Mine and the National Institute for Occupational Safety and Health conducted a study to measure how development mining affected bolt loads. Twelve fully grouted, instrumented roof bolts were installed at two three-way intersections as part of ...
Reference: 23rd International Conference on Ground Control in Mining, Morgantown, West Virginia, August 3-5, 2004
This paper describes recent studies using short encapsulation pull tests in the U.S. The study found that the SEPT can be used to make a simple evaluation of resin bolt anchorage. Suggested procedures for conducting SEPT are included. The study also confirmed ...
Reference: 21st Intl Conf on Ground Control in Mining. Morgantown, WV: West Virginia University, 2002
Despite more than half a century of experience with roof bolting, no design method has received wide acceptance. To begin to improve this situation, National Institute for Occupational Safety and Health (NIOSH) conducted a statistical study of roof bolt performance ...
Reference: 20th Intl Conf on Ground Control in Mining. Morgantown, WV: West Virginia University, 2001
Identifying the properties of overlying rocks in underground mining operations is important to ensure the appropriate roof support design is used to maintain stability of the mine entries. Recently J. H. Fletcher & Co. developed a monitoring and control system ...
Reference: 19th Intl Conf on Ground Control in Mining, 2000
The significance of a massive sandstone unit in the immediate roof to longwall support weighting is well known. If the unit lies in the main roof above the zone of caving, its influence becomes more difficult to calculate using traditional methods. Much of ...
Reference: 15th International Conference on Ground Control in Mining, Golden Colorado, August 13-15, 1996