✦ LIBER ✦
Chain pillar recovery during longwall panel retreat using pneumatic stowing to provide roof support : Hearnshaw, G; Gallaher, G Proc 2nd International Conference on Innovative Mining Systems, Pennsylbia, 27–29 October 1986 P45–47. Publ Pennsylbia: Pennsylbia State University, 1986
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- English
- Weight
- 107 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0148-9062
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