PL44878B1 - - Google Patents
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- Publication number
- PL44878B1 PL44878B1 PL44878A PL4487860A PL44878B1 PL 44878 B1 PL44878 B1 PL 44878B1 PL 44878 A PL44878 A PL 44878A PL 4487860 A PL4487860 A PL 4487860A PL 44878 B1 PL44878 B1 PL 44878B1
- Authority
- PL
- Poland
- Prior art keywords
- beams
- transverse
- frames
- spag
- mine roof
- Prior art date
Links
- 239000002184 metal Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 238000005065 mining Methods 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims 3
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000005452 bending Methods 0.000 description 4
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000009428 plumbing Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL44878B1 true PL44878B1 (OSRAM) | 1961-06-15 |
Family
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