The extraction safety factor concept in high-extraction coal mining
- Organization:
- The Southern African Institute of Mining and Metallurgy
- Pages:
- 4
- File Size:
- 382 KB
- Publication Date:
- Jan 1, 1990
Abstract
It is shown that the safety factor as calculated traditionally by use of the tributary-area theory is not valid for high-extraction methods of coal mining. An alternative approach is suggested in which the pillar loads are calculated more realistically for the period during which pillar extraction is in progress. This safety factor, which is known as the Extraction Safety Factor (ESF), can be used in determining the effects of strong layers in the overburden on pillar sizes.
Citation
APA: (1990) The extraction safety factor concept in high-extraction coal mining
MLA: The extraction safety factor concept in high-extraction coal mining. The Southern African Institute of Mining and Metallurgy, 1990.