Zobrazeno 1 - 2
of 2
pro vyhledávání: '"Dallan J. Coons"'
Autor:
Erik C. Westman, Jessica M. Wempen, Dallan J. Coons, Michael K. McCarter, William G. Pariseau
Publikováno v:
Mining, Metallurgy & Exploration. 39:1017-1026
Publikováno v:
Mining, Metallurgy & Exploration. 37:701-708
Gate-road yield pillars are subject to increases in stress as the longwall face advances toward the pillars. Increases in pillar stress can be inferred by measuring roof/floor convergence surrounding the pillar. This paper presents a case study of co