Zobrazeno 1 - 2
of 2
pro vyhledávání: '"M. S. Dobrovolsky"'
Publikováno v:
Eurasian Mining. :21-24
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d79aa22748ce8ce98b41b7e4db81cc77
https://doi.org/10.17580/em.2019.01.05
https://doi.org/10.17580/em.2019.01.05
Publikováno v:
Eurasian Mining. :27-24
During room-and-pillar mining, protective pillars of coal are usually left standing. The protective pillars differ in shape, size, process properties and extractability ratios of coal. The authors propose a classification of the protective pillars wi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d87fadef4bb554116f5fce41694a165
https://doi.org/10.17580/em.2020.02.06
https://doi.org/10.17580/em.2020.02.06