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Coal rib response during bench mining: A case study
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Published Date:Jan 2018
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Source:Int J Min Sci Technol. 28(1):107-113.
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[PDF-1.86 MB]
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Pubmed ID:29862125
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Pubmed Central ID:PMC5978751
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Description:In 2016, room-and-pillar mining provided nearly 40% of underground coal production in the United States. Over the past decade, rib falls have resulted in 12 fatalities, representing 28% of the ground fall fatalities in U.S. underground coal mines. Nine of these 12 fatalities (75%) have occurred in room-and-pillar mines. The objective of this research is to study the geomechanics of bench room-and-pillar mining and the associated response of high pillar ribs at overburden depths greater than 300 m. This paper provides a definition of the bench technique, the pillar response due to loading, observational data for a case history, a calibrated numerical model of the observed rib response, and application of this calibrated model to a second site.
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