unproductive development

unproductive development

[¦ən·prə′dək·tiv də′vel·əp·mənt]
(mining engineering)
The drifts, tunnels, and crosscuts driven in stone, preparatory to opening out production faces in a coal seam or ore body.
References in periodicals archive ?
Currently, the most unproductive development on a TV show can be frustratingly found on Pari 'Koy.
After years of being tied up in unproductive development deals, McCarthy said that she came to realize the best character she could play was herself.
To avoid such an unproductive development, it will be necessary to establish the practice of ruling and opposition parties cooperating with each other to a certain degree on key policy issues.