PL62668B1 - - Google Patents

Info

Publication number

PL62668B1

PL62668B1 PL138404A PL13840470A PL62668B1 PL 62668 B1 PL62668 B1 PL 62668B1 PL 138404 A PL138404 A PL 138404A PL 13840470 A PL13840470 A PL 13840470A PL 62668 B1 PL62668 B1 PL 62668B1

Authority

PL

Poland

Prior art keywords

layer

layers

coal

deck

middle layer

Prior art date

1970-01-26

Links

• Espacenet
• Global Dossier
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• 238000000034 method Methods 0.000 claims description 20
• 239000003245 coal Substances 0.000 claims description 17
• 239000011435 rock Substances 0.000 claims description 7
• 238000009423 ventilation Methods 0.000 claims description 4
• XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
• OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
• 229910052799 carbon Inorganic materials 0.000 claims description 2
• 238000013459 approach Methods 0.000 claims 1
• 238000009412 basement excavation Methods 0.000 description 6
• 238000005065 mining Methods 0.000 description 6
• 239000004576 sand Substances 0.000 description 5
• 239000004575 stone Substances 0.000 description 3
• 230000003245 working effect Effects 0.000 description 2
• 208000012868 Overgrowth Diseases 0.000 description 1
• 238000005267 amalgamation Methods 0.000 description 1
• 230000015572 biosynthetic process Effects 0.000 description 1
• 239000011248 coating agent Substances 0.000 description 1
• 238000000576 coating method Methods 0.000 description 1
• 230000012010 growth Effects 0.000 description 1
• 238000012423 maintenance Methods 0.000 description 1
• 239000000463 material Substances 0.000 description 1
• 230000000704 physical effect Effects 0.000 description 1
• 239000011800 void material Substances 0.000 description 1
• 239000002023 wood Substances 0.000 description 1