Summary
Stratigraphical conditions of the brown coal seams in Hungary. Physical and mechanical properties of coal and surrounding rocks. Types of powered supports applied in longwall faces. Directives of investigations preceding the selection of equipments. The ways of conducting the investigations. Data processing and evaluation. Investigations in order to determine the limits of the field of application of the powered supports of different types in the coal-field Oroszlány.
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1973. Permission to distribute - International Society for Rock Mechanics
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