Information Circular 9453 Proceedings: New Technology For Coal Mine Roof Support

Underground coal mining has always been recognized as one of the most hazardous occupations in the United States. Since 1910, more than 85,000 underground miners have lost their lives while mining coal. Approximately 47% of these fatalities, involving 40,000 miners, have occurred because of falls of roof and rib, which is a greater proportion than for any other type of incident classification.