GB1131394A - Roof support assemblies suitable for use in mines - Google Patents
Roof support assemblies suitable for use in minesInfo
- Publication number
- GB1131394A GB1131394A GB440366A GB440366A GB1131394A GB 1131394 A GB1131394 A GB 1131394A GB 440366 A GB440366 A GB 440366A GB 440366 A GB440366 A GB 440366A GB 1131394 A GB1131394 A GB 1131394A
- Authority
- GB
- United Kingdom
- Prior art keywords
- prop
- valve
- angular position
- restored
- jack
- 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
- 230000000712 assembly Effects 0.000 title 1
- 238000000429 assembly Methods 0.000 title 1
- 239000012530 fluid Substances 0.000 abstract 2
- 101100521345 Mus musculus Prop1 gene Proteins 0.000 abstract 1
- 108700017836 Prophet of Pit-1 Proteins 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 238000005065 mining Methods 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification 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
- E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
- E21D23/0418—Positioning devices and stabilizing means for the props
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
1,131,394. Advancing mine roof supports. DOWTY MINING EQUIPMENT Ltd. April 28, 1967 [Feb. 1, 1966], No.4403/66. Heading F1P In a mine roof support assembly comprising at least one hydraulic prop 1 mounted with limited angular movement on a floor-engaging member and having an advancing jack 5, the assembly is provided with a valve 6 responsive to the angular position of the or one prop and operable to permit re-setting of the prop(s) against the roof only if that prop has been restored, by means (not shown), to a predetermined angular position relative to the floor-engaging member. The roof support is advanced by pressure fluid supplied to the jack 5 through a line 7. At the end of advance a valve 9 is opened by a lever 8 and the fluid flows through lines 10, 11 to cause re-setting of the prop(s) provided that the valve 6 is in an open position indicating that the prop has been restored to the predetermined angular position. In a modification the valve 6 is disposed in the line 7 so that it operates to prevent support advance until the prop has been restored to position. The means for restoring the angular position of the props may be metal springs, resilient rubber or a hydraulic jack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB440366A GB1131394A (en) | 1966-02-01 | 1966-02-01 | Roof support assemblies suitable for use in mines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB440366A GB1131394A (en) | 1966-02-01 | 1966-02-01 | Roof support assemblies suitable for use in mines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1131394A true GB1131394A (en) | 1968-10-23 |
Family
ID=9776536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB440366A Expired GB1131394A (en) | 1966-02-01 | 1966-02-01 | Roof support assemblies suitable for use in mines |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1131394A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2121670A (en) * | 1982-06-18 | 1984-01-04 | Fives Cail Babcock | Method and apparatus for separating the kernels of palm nuts |
-
1966
- 1966-02-01 GB GB440366A patent/GB1131394A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2121670A (en) * | 1982-06-18 | 1984-01-04 | Fives Cail Babcock | Method and apparatus for separating the kernels of palm nuts |
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