GB1249246A - Control system for units of a travelling mine-roof support arrangement - Google Patents
Control system for units of a travelling mine-roof support arrangementInfo
- Publication number
- GB1249246A GB1249246A GB57607/69A GB5760769A GB1249246A GB 1249246 A GB1249246 A GB 1249246A GB 57607/69 A GB57607/69 A GB 57607/69A GB 5760769 A GB5760769 A GB 5760769A GB 1249246 A GB1249246 A GB 1249246A
- Authority
- GB
- United Kingdom
- Prior art keywords
- control system
- signal
- props
- longwall
- switches
- 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
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)
- Fluid-Pressure Circuits (AREA)
- Multiple-Way Valves (AREA)
- Control Of Position, Course, Altitude, Or Attitude Of Moving Bodies (AREA)
Abstract
1,249,246. Advancing mine roof support control system. BERGWERKSVERBAND G.m.b.H. 25 Nov., 1969 [26 Nov., 1968], No. 57607/69. Heading E1P. [Also in Division G3] The props of a longwall system are maintained in an ideal position e.g. at right angles to the seam, by means of corrective devices controlled by pendulum-type switches which in turn, are automatically set to corresponding ideal values by a command or pilot pendulum-type switch attached to a girder 3 laid along the floor of the longwall. The pilot switch comprises a plumb-bob 8a and switching element 136' which swing synchronously on changing the angle of incidence of the longwall working in front of one of two signal-associated orifices in order to activate a control system which acts on a piston and cylinder 5, 6 drive mechanism for restoring the axis of the switch housing to co-incidence with that of the bob's. The resultant pivotal movement of the housing shifts a contact mechanism which is built into the axle of rotation 7 and connected to the plurality of pendulumtype switches attached to the props (29, Fig. 5). The contact mechanism connects one signal duct out of a plurality of signal ducts with a source of compressed air in order to produce a corrective signal for setting the switches controlling the devices which alter the position of the props. For details of the control system, the specification should be referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19681810869 DE1810869A1 (en) | 1968-11-26 | 1968-11-26 | Control for units of the wandering longwall mining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1249246A true GB1249246A (en) | 1971-10-13 |
Family
ID=5714290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB57607/69A Expired GB1249246A (en) | 1968-11-26 | 1969-11-25 | Control system for units of a travelling mine-roof support arrangement |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US3638531A (en) |
| DE (1) | DE1810869A1 (en) |
| GB (1) | GB1249246A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2749312C2 (en) * | 1977-11-04 | 1984-12-20 | Gewerkschaft Eisenhütte Westfalia, 4670 Lünen | Control device with automatic repositioning for hydraulic ram removal |
| GB2153971B (en) * | 1984-02-08 | 1988-01-13 | Dobson Park Ind | Valve assembly |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1167614A (en) * | 1966-02-17 | 1969-10-15 | Bergwerksverband Gmbh | Method and Control System for Adjusting a Pit Prop Axis |
| DE1533720C3 (en) * | 1967-05-31 | 1975-01-02 | Bergwerksverband Gmbh, 4300 Essen | Device for aligning or pivoting struts in underground mining |
-
1968
- 1968-11-26 DE DE19681810869 patent/DE1810869A1/en active Pending
-
1969
- 1969-11-25 GB GB57607/69A patent/GB1249246A/en not_active Expired
- 1969-11-26 US US880062A patent/US3638531A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE1810869A1 (en) | 1970-06-04 |
| US3638531A (en) | 1972-02-01 |
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