RI 7763 Procedures Used For Sampling Fracture Orientations In An Underground Coal Mine
- Organization:
- The National Institute for Occupational Safety and Health (NIOSH)
- Pages:
- 12
- File Size:
- 603 KB
- Publication Date:
- Jan 1, 1973
Abstract
The Bureau of Mines has developed procedures for sampling the geometry of fractures in underground coal mines. Stratified cluster sampling and the unit area concept are applied to the collection of fracture orientation data. The use of unit area mapping, stratification, and site delineation is made to assure collection of representative data. The procedures developed here help to isolate sources of variability in the fracture patterns.
Citation
APA: (1973) RI 7763 Procedures Used For Sampling Fracture Orientations In An Underground Coal Mine
MLA: RI 7763 Procedures Used For Sampling Fracture Orientations In An Underground Coal Mine. The National Institute for Occupational Safety and Health (NIOSH), 1973.