| Autor: |
Morgan M. Sears, John Rusnak, Mark Van Dyke, Gamal Rashed, Khaled Mohamed, Michael Sloan |
| Jazyk: |
angličtina |
| Rok vydání: |
2018 |
| Předmět: |
|
| Zdroj: |
International Journal of Mining Science and Technology, Vol 28, Iss 1, Pp 107-113 (2018) |
| Druh dokumentu: |
article |
| ISSN: |
2095-2686 |
| DOI: |
10.1016/j.ijmst.2017.12.010 |
| Popis: |
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. Keywords: Deep cover, Bench mining, Thick seam, Retreat mining, Rib response, Rib support |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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