GB1236833A - Improvements in support assemblies for mineral mines - Google Patents
Improvements in support assemblies for mineral minesInfo
- Publication number
- GB1236833A GB1236833A GB412969A GB412969A GB1236833A GB 1236833 A GB1236833 A GB 1236833A GB 412969 A GB412969 A GB 412969A GB 412969 A GB412969 A GB 412969A GB 1236833 A GB1236833 A GB 1236833A
- Authority
- GB
- United Kingdom
- Prior art keywords
- roof
- girder
- spring
- support assemblies
- urged
- 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
- 230000000712 assembly Effects 0.000 title 1
- 238000000429 assembly Methods 0.000 title 1
- 229910052500 inorganic mineral Inorganic materials 0.000 title 1
- 239000011707 mineral Substances 0.000 title 1
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 230000004048 modification Effects 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
- E21D17/0206—Hydraulically operated extension devices
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)
- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
Abstract
1,236,833. Advancing mine roof supports. GEWERKSCHAFT EISENHUTTE WESTFALIA. 24 Jan., 1969, No. 4129/69. Heading E1P. A mine roof support assembly comprises a hydraulic prop 13, a roof-engaging girder 1 and a cantilever extension 2 which is supported by a guide member 3 fixed relative to the girder, is actuated by a displacement device 4 and is urged into contact with the roof by means such as a spring 7 or a piston- and-cylinder unit. In a series of modifications, see Figs. 2-6 (not shown), the member 2 is in the form of a flat spring strip cranked at its front end which is advanced by spring means or a plunger and urged against the roof by like means or co-operating wedging surfaces.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB412969A GB1236833A (en) | 1969-01-24 | 1969-01-24 | Improvements in support assemblies for mineral mines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB412969A GB1236833A (en) | 1969-01-24 | 1969-01-24 | Improvements in support assemblies for mineral mines |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1236833A true GB1236833A (en) | 1971-06-23 |
Family
ID=9771303
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB412969A Expired GB1236833A (en) | 1969-01-24 | 1969-01-24 | Improvements in support assemblies for mineral mines |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1236833A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2138062A (en) * | 1983-04-16 | 1984-10-17 | Dowty Mining Equipment Ltd | Roof support suitable for use in mines |
CZ308397B6 (en) * | 2019-10-25 | 2020-07-22 | Ostroj A.S. | Articulated steel mining joist to cover the ceiling at the point of contact between the face and the corridor |
-
1969
- 1969-01-24 GB GB412969A patent/GB1236833A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2138062A (en) * | 1983-04-16 | 1984-10-17 | Dowty Mining Equipment Ltd | Roof support suitable for use in mines |
US4512686A (en) * | 1983-04-16 | 1985-04-23 | Dowty Mining Equipment Limited | Roof support suitable for use in mines |
CZ308397B6 (en) * | 2019-10-25 | 2020-07-22 | Ostroj A.S. | Articulated steel mining joist to cover the ceiling at the point of contact between the face and the corridor |
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