GB744361A - Improvements in mine roof supports - Google Patents
Improvements in mine roof supportsInfo
- Publication number
- GB744361A GB744361A GB2471952A GB2471952A GB744361A GB 744361 A GB744361 A GB 744361A GB 2471952 A GB2471952 A GB 2471952A GB 2471952 A GB2471952 A GB 2471952A GB 744361 A GB744361 A GB 744361A
- Authority
- GB
- United Kingdom
- Prior art keywords
- roof
- bar
- bars
- recesses
- shackle plates
- 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
- 229910000838 Al alloy Inorganic materials 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 239000003245 coal Substances 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
- E21D17/02—Cantilever extension or similar protecting devices
- E21D17/08—Cap joints for obtaining a coal-face free of pit-props
- E21D17/086—Cap joints for obtaining a coal-face free of pit-props or articulated type
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)
- Joining Of Building Structures In Genera (AREA)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE523225D BE523225A (ro) | 1952-10-02 | ||
GB2471952A GB744361A (en) | 1952-10-02 | 1952-10-02 | Improvements in mine roof supports |
FR1084556D FR1084556A (fr) | 1952-10-02 | 1953-10-02 | Support de toit dans une mine souterraine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2471952A GB744361A (en) | 1952-10-02 | 1952-10-02 | Improvements in mine roof supports |
Publications (1)
Publication Number | Publication Date |
---|---|
GB744361A true GB744361A (en) | 1956-02-08 |
Family
ID=10216165
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2471952A Expired GB744361A (en) | 1952-10-02 | 1952-10-02 | Improvements in mine roof supports |
Country Status (3)
Country | Link |
---|---|
BE (1) | BE523225A (ro) |
FR (1) | FR1084556A (ro) |
GB (1) | GB744361A (ro) |
-
0
- BE BE523225D patent/BE523225A/xx unknown
-
1952
- 1952-10-02 GB GB2471952A patent/GB744361A/en not_active Expired
-
1953
- 1953-10-02 FR FR1084556D patent/FR1084556A/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
BE523225A (ro) | |
FR1084556A (fr) | 1955-01-20 |
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