PL50830B3 - - Google Patents
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- Publication number
- PL50830B3 PL50830B3 PL103671A PL10367164A PL50830B3 PL 50830 B3 PL50830 B3 PL 50830B3 PL 103671 A PL103671 A PL 103671A PL 10367164 A PL10367164 A PL 10367164A PL 50830 B3 PL50830 B3 PL 50830B3
- Authority
- PL
- Poland
- Prior art keywords
- section
- stand
- mining
- profiles
- corridor
- Prior art date
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- 238000005065 mining Methods 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 230000003245 working effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims 1
- 238000009412 basement excavation Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL50830B3 true PL50830B3 (enrdf_load_html_response) | 1966-02-25 |
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