GB1250235A - - Google Patents
Info
- Publication number
- GB1250235A GB1250235A GB1250235DA GB1250235A GB 1250235 A GB1250235 A GB 1250235A GB 1250235D A GB1250235D A GB 1250235DA GB 1250235 A GB1250235 A GB 1250235A
- Authority
- GB
- United Kingdom
- Prior art keywords
- march
- mine roof
- paper
- casing
- woven
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000463 material Substances 0.000 abstract 2
- 239000002184 metal Substances 0.000 abstract 2
- 239000000123 paper Substances 0.000 abstract 2
- 239000002657 fibrous material Substances 0.000 abstract 1
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract 1
- 238000003475 lamination Methods 0.000 abstract 1
- 239000011707 mineral Substances 0.000 abstract 1
- 239000004033 plastic Substances 0.000 abstract 1
- 229920003023 plastic Polymers 0.000 abstract 1
- 239000012260 resinous material Substances 0.000 abstract 1
- 239000004753 textile Substances 0.000 abstract 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/02—Non-telescopic props
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Laminated Bodies (AREA)
Abstract
1,250,235. Improvements in-or relating to mine roof supports. GELSENKIRCHENER BERGWERKS-A.G. 12 March, 1969 [15 March, 1968], No. 13106/69. Heading E1E. In a chock type mine roof support the beams 1 comprise a core of concrete and a sheet metal casing. The casing must be stretchable under load and other specified materials are paper, cardboard, wire, wire gauze (with or without paper lamination), perforate or plain metal sheet, woven material, non-woven bonded fibrous material or a wound package of textile or mineral fibres or a synthetic plastics or resinous material. A wedge 4 may be provided.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19681608279 DE1608279A1 (en) | 1968-03-15 | 1968-03-15 | Component for pit construction, especially beams for pillars in box construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1250235A true GB1250235A (en) | 1971-10-20 |
Family
ID=5681508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1250235D Expired GB1250235A (en) | 1968-03-15 | 1969-03-12 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE727235A (en) |
| FR (1) | FR2003959A1 (en) |
| GB (1) | GB1250235A (en) |
-
1969
- 1969-01-22 BE BE727235D patent/BE727235A/xx unknown
- 1969-03-07 FR FR6906414A patent/FR2003959A1/fr not_active Withdrawn
- 1969-03-12 GB GB1250235D patent/GB1250235A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2003959A1 (en) | 1969-11-14 |
| BE727235A (en) | 1969-07-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |