GB949674A - Self-advancing mine roof supports - Google Patents
Self-advancing mine roof supportsInfo
- Publication number
- GB949674A GB949674A GB54960A GB54960A GB949674A GB 949674 A GB949674 A GB 949674A GB 54960 A GB54960 A GB 54960A GB 54960 A GB54960 A GB 54960A GB 949674 A GB949674 A GB 949674A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ram
- roof
- advancing
- cylinder
- mine roof
- 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
- 230000004048 modification Effects 0.000 abstract 2
- 238000012986 modification Methods 0.000 abstract 2
- 239000002699 waste material Substances 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
- E21D23/0052—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
949,674. Advancing mine roof supports. ELECTRO-HYDRAULICS Ltd. Jan. 5, 1961 [Jan. 6, 1960; June 7, 1960], Nos. 549/60 and 20009/60. Heading E1E. An advancing mine roof support, Fig. 6, comprises two frames-each including a floor skid 1, two hydraulic props 2, 3 and a roof barwhich are slidably mounted on guide rods 4, 4a respectively and are advanced by a rack and pinion mechanism 7, 7a, 10, the pinion 10 being mounted on the cylinder of a conveyer advancing ram 8, 9. In a modification, the ram carries one ore more pulleys or sheaves to which the frames are slidably coupled by ropes or chains, the roof bars being slidably interconnected, if so desired, see Figs. 1-5 of the Provisional Specification (not shown). In a further modification, Fig. 8, each skid is secured to a guide rod 24 sliding in the pivoted end sections 28 of a guide device 26 which is carried by the cylinder 25 of the ram and which houses a pulley or pulleys 27. Again, each guide rod may be provided with an adjustable stop which acts as a thrust abutment for frame advancing purposes. The member 26 or the ram cylinder may carry an additional prop to support the roof at the waste edge, see Fig. 10 (not shown).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB54960A GB949674A (en) | 1960-01-06 | 1960-01-06 | Self-advancing mine roof supports |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB54960A GB949674A (en) | 1960-01-06 | 1960-01-06 | Self-advancing mine roof supports |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB949674A true GB949674A (en) | 1964-02-19 |
Family
ID=9706329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB54960A Expired GB949674A (en) | 1960-01-06 | 1960-01-06 | Self-advancing mine roof supports |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB949674A (en) |
-
1960
- 1960-01-06 GB GB54960A patent/GB949674A/en not_active Expired
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