Author : Simon Harry Ash
Publisher :
Page : 22 pages
File Size : 50,46 MB
Release : 1946
Category : Anthracite coal
ISBN :
Federal participation in a cooperative "backfilling" program to prevent surface cave-ins in the anthracite region of Pennsylvania is recommended in this report, which describes a plan for filling worked-out underground areas with waste or other material. Presents the various systems of backfilling and the technical problems involved. Bibliography included
Author : Ralph H. Whaite
Publisher :
Page : 558 pages
File Size : 43,42 MB
Release : 1975
Category : Mining engineering
ISBN :
Author :
Publisher :
Page : 764 pages
File Size : 43,5 MB
Release : 1947
Category : Mineral industries
ISBN :
Author :
Publisher :
Page : 874 pages
File Size : 28,80 MB
Release : 1947
Category : Mineral industries
ISBN :
Author :
Publisher :
Page : 642 pages
File Size : 18,62 MB
Release : 1953
Category : Mines and mineral resources
ISBN :
Author : Gary J. Colaizzi
Publisher :
Page : 108 pages
File Size : 34,50 MB
Release : 1981
Category : Abandoned coal mines
ISBN :
Author :
Publisher :
Page : 540 pages
File Size : 13,44 MB
Release : 1951
Category : Airplanes
ISBN :
Author : United States. Bureau of Mines
Publisher :
Page : 658 pages
File Size : 40,17 MB
Release : 1950
Category :
ISBN :
Author :
Publisher :
Page : 630 pages
File Size : 47,89 MB
Release : 1981
Category : Mines and mineral resources
ISBN :
Author : Robert S. Sanford
Publisher :
Page : 1148 pages
File Size : 36,87 MB
Release : 1948
Category : Manganese
ISBN :
