GB735294A - Improvements relating to fluid-operated roof-supporting units for use in mines and like places - Google Patents
Improvements relating to fluid-operated roof-supporting units for use in mines and like placesInfo
- Publication number
- GB735294A GB735294A GB567952A GB567952A GB735294A GB 735294 A GB735294 A GB 735294A GB 567952 A GB567952 A GB 567952A GB 567952 A GB567952 A GB 567952A GB 735294 A GB735294 A GB 735294A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ram
- roof
- piston
- fluid
- pressure
- 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
- 239000012530 fluid Substances 0.000 abstract 2
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
- E21D23/006—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices
- E21D23/0073—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices 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)
- Actuator (AREA)
Abstract
735,294. Mine roof supports. BOLTON & CO. (ENGINEERS), Ltd., A., and BOLTON, R. B. May 6, 1953 [March 4, 1952], No. 5679/52. Class 20 (2). A fluid-pressure mine roof supporting unit comprises a forward roof supporting ram 11 and a rearward roof-supporting ram 12 linked together by a double-acting ram 26, the opposite sides of the piston of which communicate respectively with the cylinders of the rams 11, 12. The ram 11 is mounted on the ram 26 the piston rod 18 of which is connected by a balljointed link 20 to the ram 12. The forward ram 11 communicates through a passage 87 with the after side of the piston 70 of the ram 26 and the rearward ram 12 communicates through passages 75, 74, 73 in the link 20 and rod 18 with the forward side of the piston 70. Thus when fluid is supplied to the forward ram 11 it is forced more powerfully against the roof and fluid acting behind the piston 70 of the ram 26 moves the rear ram 12 forward. Similarly the ram 12 is forced against the roof and the ram 11 moved forward. Sufficient pressure may be maintained in the ram 11 or 12 which is being moved to support the roof. Each ram 11, 12 comprises telescoping pistons 27, 31 which must rise together and when a shoulder 33 stops the outer piston the inner piston rises to apply the final pressure. Roof-engaging straps 46, 47 are mounted on spherical joists on these pistons and are connected by a sliding bar 60 hinged at 61 to the strap 47. A skid bar 92 protecting the mechanism is mounted on the front of the cylinder 26 by a pin 93 and the skid bars of neighbouring units are connected by an intermediate skid bar connected by sliding hinges, Fig. 5 (not shown). The pressure supply pipes of a battery of units may be inter. connected.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB567952A GB735294A (en) | 1952-03-04 | 1952-03-04 | Improvements relating to fluid-operated roof-supporting units for use in mines and like places |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB567952A GB735294A (en) | 1952-03-04 | 1952-03-04 | Improvements relating to fluid-operated roof-supporting units for use in mines and like places |
Publications (1)
Publication Number | Publication Date |
---|---|
GB735294A true GB735294A (en) | 1955-08-17 |
Family
ID=9800613
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB567952A Expired GB735294A (en) | 1952-03-04 | 1952-03-04 | Improvements relating to fluid-operated roof-supporting units for use in mines and like places |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB735294A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1130783B (en) * | 1959-07-17 | 1962-06-07 | Hermann Schwarz Kommanditgesel | Pressure medium-operated support body for the pit construction |
DE1156369B (en) * | 1956-08-04 | 1963-10-31 | Rheinstahl Gmbh Wanheim | Hydraulic longwall construction consisting of a group of rams |
DE1177099B (en) * | 1956-02-28 | 1964-09-03 | Dobson Ltd W E & F | Migrating hydraulic longwall mining |
DE1205034B (en) * | 1964-03-20 | 1965-11-18 | Coal Industry Patents Ltd | Wandering pit support |
DE1261098B (en) * | 1961-04-12 | 1968-02-15 | Gewerk Eisenhuette Westfalia | Extension frame for moving longwall mining |
CN117552819A (en) * | 2024-01-12 | 2024-02-13 | 中国安全生产科学研究院 | Emergency rescue supporting device for underground inclined opening |
-
1952
- 1952-03-04 GB GB567952A patent/GB735294A/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1177099B (en) * | 1956-02-28 | 1964-09-03 | Dobson Ltd W E & F | Migrating hydraulic longwall mining |
DE1156369B (en) * | 1956-08-04 | 1963-10-31 | Rheinstahl Gmbh Wanheim | Hydraulic longwall construction consisting of a group of rams |
DE1130783B (en) * | 1959-07-17 | 1962-06-07 | Hermann Schwarz Kommanditgesel | Pressure medium-operated support body for the pit construction |
DE1261098B (en) * | 1961-04-12 | 1968-02-15 | Gewerk Eisenhuette Westfalia | Extension frame for moving longwall mining |
DE1205034B (en) * | 1964-03-20 | 1965-11-18 | Coal Industry Patents Ltd | Wandering pit support |
CN117552819A (en) * | 2024-01-12 | 2024-02-13 | 中国安全生产科学研究院 | Emergency rescue supporting device for underground inclined opening |
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