Geologic investigation of roof and floor strata
Subtitle: Longwall demonstration, Old Ben Mine no. 24 : final technical report, no. 1
By: by Robert A. Bauer and Philip J. DeMaris
Contributors: DeMaris, Philip J.
Series: Illinois Geological Survey : ISGS Contract Grant report -- 1982-2; DOE/ET/12177-1; Illinois Geological Survey : ISGS Contract Grant report -- 1982-2.
Publisher: Illinois State Geological Survey
Published: 1982
Place of publication: Champaign, Ill
Language: eng
Number of pages: 49
Subjects: Coal mines and mining; Mine roofs (Stability); Coal balls
Notes: "FE/9007-1."