Causes and control of coal mine bumps.
Goode-CA; Zona-A; Campoli-AA
Procceedings of the Fifteenth Annual Institute on Coal Mining Health, Safety and Research, Blacksburg, Virginia, August 28-30, 1984. Blacksburg, VA: Virginia Polytechnic Institute and State University, 1984 Aug; :155-166
A coal bump or burst in a coal mine is defined as the instantaneous violent failure of a coal pillar(s) from overstress. The causes of coal bumps are not well understood. In some bump-prone seams, minor disturbances are a daily occurrence. Lack of knowledge about coal bumps coupled with questionable mining practices can create disastrous bump situations. Reportable bumps are defined by MSHA as those that cause disruption in the mining operation for more than one hour or result in injury or death. It is often difficult to ascertain whether or not some bumps are masked by 'other events. For example, a gas release triggered by a bump may ignite, and the event is reported as an explosion. Therefore, the relatively few occurrences that are reported probably represent a conservative number. Given the consequences of bumps in terms of pain and suffering, property damage, and production delays, this problem must be taken seriously. Further, as one of the major factors causing bumps is seam depth, this problem will increase as shallow reserves are depleted, requiring the mining of deeper seams. Much of the early work on bumps was documented by U.S. Bureau of Mines researchers and operators of mines prone to bumps. In 1954 the Bureau of Mines published Bulletin 535, "Coal Mine Bumps: Some Aspects of Occurrence, Cause, and Control," by C. T. Holland and E. Thomas. The report analyzed the occurrence and causes of coal bumps that had occurred over a 25-year period. It is the purpose of this paper to compare recent events with these findings and to suggest measures that can be taken to minimize the potential occurrence and severity of coal bumps.
Underground-mining; Room-and-pillar-mining; Longwall-mining; Coal-mining; Disaster-prevention; Injury-prevention; Safety-engineering; Safety-research; Monitoring-systems; Structural-analysis
Karmis-M; Sutherland-WH; Lucas-JR; Forshey-DR; Faulkner-GJ
Procceedings of the Fifteenth Annual Institute on Coal Mining Health, Safety and Research, Blacksburg, Virginia, August 28-30, 1984