GB551766A - Improvements in and relating to roof supports for mines - Google Patents
Improvements in and relating to roof supports for minesInfo
- Publication number
- GB551766A GB551766A GB1409141A GB1409141A GB551766A GB 551766 A GB551766 A GB 551766A GB 1409141 A GB1409141 A GB 1409141A GB 1409141 A GB1409141 A GB 1409141A GB 551766 A GB551766 A GB 551766A
- Authority
- GB
- United Kingdom
- Prior art keywords
- props
- caps
- straps
- recesses
- roof supports
- 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
- 239000002184 metal Substances 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 230000000284 resting effect 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
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)
- Roof Covering Using Slabs Or Stiff Sheets (AREA)
Abstract
551,766. Mine-roof supports. SYLVESTER, W. Nov. I, 1941, No. 14091. [Class 20 (ii)] An improvement. in, or modification of the. invention of Specification 457,122 comprises the use of resilient or flexible straps between the props to avoid permanent. distortion under excessive loading, and loose hingeing at the ends to the support caps on the props. The straps b may be of flat strip resilient metal and corrugated, or may be built, up into a leaf spring and the ends are curved over and adapted loosely to engage recesses provided in caps a resting on the heads of the. props. The recesses in the caps may be provided with boundary walls a<SP>1</SP> and the abutting surfaces of the recesses and the straps may be corrugated transversely to interfit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1409141A GB551766A (en) | 1941-11-01 | 1941-11-01 | Improvements in and relating to roof supports for mines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1409141A GB551766A (en) | 1941-11-01 | 1941-11-01 | Improvements in and relating to roof supports for mines |
Publications (1)
Publication Number | Publication Date |
---|---|
GB551766A true GB551766A (en) | 1943-03-09 |
Family
ID=10034820
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1409141A Expired GB551766A (en) | 1941-11-01 | 1941-11-01 | Improvements in and relating to roof supports for mines |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB551766A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE943401C (en) * | 1950-08-01 | 1956-05-17 | Alexander Schmidt Dr Ing | Longwall mining |
US3163012A (en) * | 1961-01-18 | 1964-12-29 | Joseph B Dempscy | Mine roof bolt installation |
-
1941
- 1941-11-01 GB GB1409141A patent/GB551766A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE943401C (en) * | 1950-08-01 | 1956-05-17 | Alexander Schmidt Dr Ing | Longwall mining |
US3163012A (en) * | 1961-01-18 | 1964-12-29 | Joseph B Dempscy | Mine roof bolt installation |
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