GB862921A - Roof support frame for mine workings - Google Patents
Roof support frame for mine workingsInfo
- Publication number
- GB862921A GB862921A GB21056/57A GB2105657A GB862921A GB 862921 A GB862921 A GB 862921A GB 21056/57 A GB21056/57 A GB 21056/57A GB 2105657 A GB2105657 A GB 2105657A GB 862921 A GB862921 A GB 862921A
- Authority
- GB
- United Kingdom
- Prior art keywords
- roof
- toggles
- props
- roof support
- floor
- 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
- 230000003245 working effect Effects 0.000 title 1
- 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
- E21D23/0069—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 without essential advancing shifting 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)
- Tents Or Canopies (AREA)
- Pivots And Pivotal Connections (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
862,921. Mine roof supports. SCHMID, F. July 3, 1957 [July 3, 1956], No. 21056/57. Class 20(2) A mine roof support comprises floor and roof bars 3, 4 pivoted to two props 5, 6 in the form of toggles and a fluid pressure cylinder 7 operates between the toggle joints to extend the toggles. One of these props may be replaced by a conventional straight prop. The arms of the props are telescopically adjustable by means of pins 11a and the angle of the toggles may be adjusted by series of adjustment-connection holes 13a in the floor and roof bars. The roof support can be locked in position by means of stays 16 or the pistons may be locked in the cylinder. The floor and roof bars each comprise two members connected together by pivots 8, 9.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE862921X | 1956-07-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB862921A true GB862921A (en) | 1961-03-15 |
Family
ID=6799815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB21056/57A Expired GB862921A (en) | 1956-07-03 | 1957-07-03 | Roof support frame for mine workings |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB862921A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3855802A (en) * | 1973-09-12 | 1974-12-24 | G Alacchi | Walking supporting pier for coal mines |
| US4382722A (en) * | 1981-02-02 | 1983-05-10 | Centrum Konstrukcyino-Technologiczne Maszyn Gorniczych "Komag" | Nine lining structure |
-
1957
- 1957-07-03 GB GB21056/57A patent/GB862921A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3855802A (en) * | 1973-09-12 | 1974-12-24 | G Alacchi | Walking supporting pier for coal mines |
| US4382722A (en) * | 1981-02-02 | 1983-05-10 | Centrum Konstrukcyino-Technologiczne Maszyn Gorniczych "Komag" | Nine lining structure |
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