Mechanisation of mines and working position of miners in relation to seam thickness, 1961–62*
| Seam thickness (inches) | Working position† | Degree of mechanisation (%) | ||||
|---|---|---|---|---|---|---|
| Very low | Low | Medium | High | |||
| *Derived from Liddell (1973)7 | ||||||
| †Figure given in brackets is the percentage of face workers in the UK working in such a position. | ||||||
| <30 | Lying | (7.0) | 55.7 | 18.9 | 19.1 | 6.3 |
| 30– | Kneeling | (47.9) | 24.2 | 31.1 | 22.4 | 22.2 |
| 50– | Stooping | (39.1) | 15.3 | 24.7 | 30.1 | 30.0 |
| ⩾70 | Standing | (5.9) | 34.4 | 25.5 | 16.5 | 23.6 |