GB1179758A - Hydraulic Mine Support Systems - Google Patents
Hydraulic Mine Support SystemsInfo
- Publication number
- GB1179758A GB1179758A GB5223667A GB5223667A GB1179758A GB 1179758 A GB1179758 A GB 1179758A GB 5223667 A GB5223667 A GB 5223667A GB 5223667 A GB5223667 A GB 5223667A GB 1179758 A GB1179758 A GB 1179758A
- Authority
- GB
- United Kingdom
- Prior art keywords
- jack
- exhaust
- valve
- prop
- advancing
- 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 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
- E21D23/006—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
-
- 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
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting 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)
- Treatment Of Fiber Materials (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
1,179,758. Advancing mine roof supports. GEWERKSGHAFT EISENHUTTE WESTFALIA. 16 Nov., 1967 [20 Jan., 1967], No. 52236/67. Heading E1P. In an advancing mine roof support assembly comprising relatively adjustable frames A, B adapted to be selectively advanced by a doubleacting jack 19, 23 and wherein each prop 14, 15 and the jack are coupled to power and exhaust lines 2, 3 through a three-positional control valve 10 or 22, respectively, arranged as shown, the props are shiftable under limited roof loading conditions and to this end have their working chambers 12 connected to the exhaust side of the jack with the interposition in the exhaust circuit of a pressurelimiting valve 9 set to operate at a lower pressure than that of the prop setting valves 16. The above arrangement is such that should an advancing prop encounter a roof cavity it will be extended by exhaust fluid from the jack until the valve 9 is operated to connect the exhaust line 3 to a sump 5. The valve 9 is by-passed during robbing of the props by a control valve 7.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEG0049040 | 1967-01-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1179758A true GB1179758A (en) | 1970-01-28 |
Family
ID=7128850
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5223667A Expired GB1179758A (en) | 1967-01-20 | 1967-11-16 | Hydraulic Mine Support Systems |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE1533730A1 (en) |
GB (1) | GB1179758A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4264237A (en) * | 1978-07-12 | 1981-04-28 | Bergwerksverband Gmbh | Method for controlling a hydraulically operated mine roof support and an arrangement for carrying out the method |
US4473324A (en) * | 1982-03-06 | 1984-09-25 | Dowty Mining Equipment Limited | Mine roof supports |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3104940C2 (en) * | 1980-02-14 | 1986-08-21 | Dowty Mining Equipment Ltd., Ashchurch, Tewkesbury,Gloucestershire | Device for controlling the pressure of an extension frame that can be moved under partial load |
-
1967
- 1967-01-20 DE DE19671533730 patent/DE1533730A1/en active Pending
- 1967-11-16 GB GB5223667A patent/GB1179758A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4264237A (en) * | 1978-07-12 | 1981-04-28 | Bergwerksverband Gmbh | Method for controlling a hydraulically operated mine roof support and an arrangement for carrying out the method |
US4473324A (en) * | 1982-03-06 | 1984-09-25 | Dowty Mining Equipment Limited | Mine roof supports |
Also Published As
Publication number | Publication date |
---|---|
DE1533730A1 (en) | 1970-01-22 |
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