GB1430240A - Mine roof support - Google Patents
Mine roof supportInfo
- Publication number
- GB1430240A GB1430240A GB3439372A GB3439372A GB1430240A GB 1430240 A GB1430240 A GB 1430240A GB 3439372 A GB3439372 A GB 3439372A GB 3439372 A GB3439372 A GB 3439372A GB 1430240 A GB1430240 A GB 1430240A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- frame
- outlets
- roof support
- 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
- 239000012530 fluid Substances 0.000 abstract 1
- 238000005065 mining Methods 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
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)
- Safety Valves (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
1430240 Advancing mine roof support systems DOWTY MINING EQUIPMENT Ltd 9 July 1973 [22 July 1972] 34393/72 Heading E1P [Also in Division F1] In a mine roof support frame comprising a series of hydraulic props mechanically secured to-gether, each prop is provided with relief valve means controlling the escape of fluid from its working chamber to atmosphere. The valve arrangement is such that the frame can yield both under slow and rapid conditions as determined by use and/or valve and prop details Figs. 3 and 4, (not shown) and Heading F1D should be referred to. The control circuit for the frame 1, 2 comprises a rotary valve 51 incorporating a manually operated pressure control valve 65, the valve 51 having four outlets 54, 57, 58, 59 therefrom and three inlets 61, 62, 64 thereto. The outlets 54, 58 communicate respectively with the working chambers 67, 68 of the advancing jack 11 whilst the outlets 57, 59 communicate respectively with pilot operated valves 52, 53 and non-return valves 69, 71 arranged in the lines 55, 56 to the frame 1, 2 as shown. For modus operandi the Specification should be referred to.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3439372A GB1430240A (en) | 1972-07-22 | 1972-07-22 | Mine roof support |
| ZA734686A ZA734686B (en) | 1972-07-22 | 1973-07-11 | Mine roof supports |
| PL1973164201A PL91078B1 (en) | 1972-07-22 | 1973-07-20 | |
| DE19732337390 DE2337390B2 (en) | 1972-07-22 | 1973-07-23 | PIT SUPPORT FRAME |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3439372A GB1430240A (en) | 1972-07-22 | 1972-07-22 | Mine roof support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1430240A true GB1430240A (en) | 1976-03-31 |
Family
ID=10365098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3439372A Expired GB1430240A (en) | 1972-07-22 | 1972-07-22 | Mine roof support |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE2337390B2 (en) |
| GB (1) | GB1430240A (en) |
| PL (1) | PL91078B1 (en) |
| ZA (1) | ZA734686B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4237769A (en) * | 1978-04-03 | 1980-12-09 | Commercial Shearing, Inc. | Relief valves and mine props incorporating the same |
| DE3340888C1 (en) * | 1983-11-11 | 1985-02-07 | Hermann Hemscheidt Maschinenfabrik Gmbh & Co, 5600 Wuppertal | Hydraulic prop with rock-burst valve for a self-advancing powered support assembly |
| CN109322689B (en) * | 2018-10-31 | 2024-06-25 | 辽宁工程技术大学 | Pressure flow function control valve group for anti-collision hydraulic support |
-
1972
- 1972-07-22 GB GB3439372A patent/GB1430240A/en not_active Expired
-
1973
- 1973-07-11 ZA ZA734686A patent/ZA734686B/en unknown
- 1973-07-20 PL PL1973164201A patent/PL91078B1/pl unknown
- 1973-07-23 DE DE19732337390 patent/DE2337390B2/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| DE2337390A1 (en) | 1974-02-07 |
| DE2337390B2 (en) | 1977-11-10 |
| PL91078B1 (en) | 1977-02-28 |
| ZA734686B (en) | 1974-06-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed |
Free format text: IN PAT.BUL. 4565, PAGE 2838; FOR 1420240 READ 1430240 |
|
| PCNP | Patent ceased through non-payment of renewal fee |