Development of measures for improving roof stability in longwalls with individual supports in the extraction of thin steep seams of the Donbass at deep horizons

  • 05.15.02

Saint Petersburg

89 pp.

Development of measures for improving roof stability in longwalls with individual supports in the extraction of thin steep seams of the Donbass at deep horizons — Piven', Yuriy Anatol'evich — 1994 — Russian Dissertation Library