GB786538A - Improvements in and relating to caps for supporting mine roofs - Google Patents
Improvements in and relating to caps for supporting mine roofsInfo
- Publication number
- GB786538A GB786538A GB22572/55A GB2257255A GB786538A GB 786538 A GB786538 A GB 786538A GB 22572/55 A GB22572/55 A GB 22572/55A GB 2257255 A GB2257255 A GB 2257255A GB 786538 A GB786538 A GB 786538A
- Authority
- GB
- United Kingdom
- Prior art keywords
- flanges
- caps
- relating
- cap
- engage
- 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
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D17/00—Caps for supporting mine roofs
- E21D17/01—Caps for supporting mine roofs characterised by the shape of the cap, e.g. of specified cross-section
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
786,538. Mine roof supports. GUTEHOFFNUNGSHUTTE STERKRADE AKT.- GES. Aug. 5, 1955 [Sept. 14. 1954], No. 22572/55. Class 20(2) A cap for supporting mine roofs is of box section and comprises two juxtaposed I-sections of high heat-treated steel the top and bottom flanges 1, 2 of which are welded together along edges 3 and have outside surfaces inclined inwardly towards the edges 3. The flanges of each I-section are inclined and oppositely arranged so that the top and bottom surfaces of the cap are concave and only engage a pit prop directly below the flanges 4. The outside flanges have parts 6 to engage lugs on the pit props.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE786538X | 1954-09-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB786538A true GB786538A (en) | 1957-11-20 |
Family
ID=6699042
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB22572/55A Expired GB786538A (en) | 1954-09-14 | 1955-08-05 | Improvements in and relating to caps for supporting mine roofs |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB786538A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1988001680A1 (en) * | 1986-08-28 | 1988-03-10 | Armo Gesellschaft Für Bauelemente, Bau- Und Wohnbe | Section for the shoring of mines and tunnels |
EP0331618A2 (en) * | 1988-03-02 | 1989-09-06 | Preussag Stahl Aktiengesellschaft | Method for manufacturing a steel section, and its use and section |
-
1955
- 1955-08-05 GB GB22572/55A patent/GB786538A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1988001680A1 (en) * | 1986-08-28 | 1988-03-10 | Armo Gesellschaft Für Bauelemente, Bau- Und Wohnbe | Section for the shoring of mines and tunnels |
US4881853A (en) * | 1986-08-28 | 1989-11-21 | Benning Guenter | Support section for mines and tunnels |
EP0331618A2 (en) * | 1988-03-02 | 1989-09-06 | Preussag Stahl Aktiengesellschaft | Method for manufacturing a steel section, and its use and section |
EP0331618A3 (en) * | 1988-03-02 | 1991-01-02 | Preussag Stahl Aktiengesellschaft | Method for manufacturing a steel section, and its use and section |
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