ABSTRACT
If the same teams had remained on the same faces after reorganization without technological change, a straightforward indication could have been obtained of the effects of introducing composite longwall working, as for the Donbass faces described in the Report of the Technical Mission (Chapter XXX). With the regrouping of teams, however, the finishing of A and the introduction of cutting on B, only limited ‘before’ and ‘after’ comparisons are possible. Data were available for 12 weeks before reorganization and for nine, 11, and eight weeks after, on B, C, and D. The comparisons for each face ( Table 30 ) are made in terms of the completeness of production index described in Chapter XII. As actual manning was the same in the before and after periods, it does not have to be taken into account as it has to be when comparisons between faces are made.
