PTBA Internship Report · internship-4-1b
Calorific-value relationships — Seam A1
Only three plotted observations support the Seam A1 quality panel. Ash and inherent moisture appear to vary inversely with calorific value within that small set, whereas sulfur and volatile matter show no stable visual relation.
SOURCE-LED TECHNICAL READING
Geological interpretation and evidential boundary
Only three plotted observations support the Seam A1 quality panel. Ash and inherent moisture appear to vary inversely with calorific value within that small set, whereas sulfur and volatile matter show no stable visual relation. With n=3, a fitted trend would be descriptive rather than predictive: one point can materially rotate the slope, and the plot cannot establish peat environment, washability or mine-scale variability.
- Source
- Private internship source vault · Chapter IV record
- Location in source
- 4.3.1 Seam A1
- Image quality
- Source scan
- Record ID
- internship-4-1b
