Yield pillar design under strong roof, weak coal, and weak floor condition in US longwall mining — A case study
Abstract
The performance of yield pillar is studied under strong roof, weak coal and weak floor condition. By employing finite element method that takes time dependent and plastic failure of rock into consideration, the major functions and mechanisms of yield pillar are discussed. A standard procedure for the determination of yield pillar size is also developed. Using the data obtained from a West Virginia coal mine, a suitable range of yield pillar size is determined for a case study.
Fields of Study & Subjects
Geomechanics and Mining Engineering
Geotechnical and Mining Engineering
Mining and Industrial Processes
Publication details
- Journal / source
- CRC Press eBooks
- Pages
- 13–29
- Publication date
- 14 January 2026
- Language
- EN
- Document type
- Book chapter