GB1029244A - Improvements in mine-roof supports - Google Patents
Improvements in mine-roof supportsInfo
- Publication number
- GB1029244A GB1029244A GB2462161A GB2462161A GB1029244A GB 1029244 A GB1029244 A GB 1029244A GB 2462161 A GB2462161 A GB 2462161A GB 2462161 A GB2462161 A GB 2462161A GB 1029244 A GB1029244 A GB 1029244A
- Authority
- GB
- United Kingdom
- Prior art keywords
- roof
- bars
- contacting
- units
- unit
- 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
- 239000003245 coal Substances 0.000 abstract 1
- 230000008602 contraction Effects 0.000 abstract 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/0004—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor along the working face
- E21D23/0017—Pile type supports
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/0047—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor without essential shifting devices
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/0052—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor with advancing shifting devices connected therewith
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)
- Framework For Endless Conveyors (AREA)
Abstract
1,029,244. Advancing mine roof supports. COAL INDUSTRY (PATENTS) Ltd. July 9, 1962 [July 7, 1961], No. 24621/61. Heading E1E In an advancing mine roof support assembly comprising leading and trailing support units 1, 2, each with a roof-contacting part, a roofcontacting member 5 pivotally mounted on one of said parts and slidably mounted on the other, and means to advance the units relatively by alternate longitudinal extensions and contractions of the assembly, the said part on the unit 2 has two spaced parallel bend-proof roof-contacting bars 6 interconnected to form a slide-way to receive a part of the member 5. The unit has two such bars 6 interconnected by a hinge pin 7 for the member 5 which is non-bend-proof. The bars 6 have cantilever portions 6a. The units 1, 2 are movably attached to a conveyer drive unit 3 by double-acting rams 4 and mount conventional roof-contacting bars 11.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2462161A GB1029244A (en) | 1961-07-07 | 1961-07-07 | Improvements in mine-roof supports |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2462161A GB1029244A (en) | 1961-07-07 | 1961-07-07 | Improvements in mine-roof supports |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1029244A true GB1029244A (en) | 1966-05-11 |
Family
ID=10214580
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2462161A Expired GB1029244A (en) | 1961-07-07 | 1961-07-07 | Improvements in mine-roof supports |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1029244A (en) |
-
1961
- 1961-07-07 GB GB2462161A patent/GB1029244A/en not_active Expired
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