GB823127A - Improvements in and relating to mine roof support systems - Google Patents
Improvements in and relating to mine roof support systemsInfo
- Publication number
- GB823127A GB823127A GB5450/55A GB545055A GB823127A GB 823127 A GB823127 A GB 823127A GB 5450/55 A GB5450/55 A GB 5450/55A GB 545055 A GB545055 A GB 545055A GB 823127 A GB823127 A GB 823127A
- Authority
- GB
- United Kingdom
- Prior art keywords
- supports
- roof
- jack
- conveyer
- advanced
- 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 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
- E21D23/0052—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor with advancing shifting devices connected therewith
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D23/08—Advancing mechanisms
- E21D23/081—Advancing mechanisms forming parts of the roof supports
- E21D23/085—Advancing mechanisms forming parts of the roof supports acting on a conveyor or a guide for the mining machine
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
Abstract
823,127. Mine roof supports. DOWTY MINING EQUIPMENT Ltd. Feb. 16, 1956 [Feb. 23, 1955], No. 5450/55. Class 20 (2) [Also in Group XXX] Mine roof supports connected by feed jacks to a coal conveyer 13, Fig. 1, are of two kinds 14, 17 the supports 14 each having a roof bar with a longer cantilever extension 21 than the extension 22 of each support 17 so that the supports 14 can be advanced to support the newly exposed roof in the wake of a coal cutter 12 before the coal conveyer can be advanced. The supports 14 have two hydraulic props between floor and roof bars and the supports 17 have three hydraulic props and both supports are advanced by the feed jacks after the pressure in the hydraulic props has been released and the conveyer is advanced by the feed jack connections to the supports 14. Each prop has a convex base and head to allow rocking movement relative to the floor and roof bars, located by a spigot 29, Fig. 3, and a bolt 41 respectively, a rubber collar 32 restores the prop to the vertical. The feed jacks 44 are mounted in the hollow floor bars 23 by means of a gimbals 47 and the jack piston rod 51 is connected to the conveyer 13 by a universal joint 54 and a long vertical pin 55 to allow for relative movement of the floor bar and the conveyer 13. A shield 57 for the piston rod 51 is drawn out therewith by forks 58. The feed jack 44 is double acting, the chambers 99, 102, Fig. 4, of which are connected to supply and lease mains by a handoperated selector valve having spring plunger valves. The props are supplied and released through the selector valve and the jack 44, the supply being through the chamber 102, i.e. when the jack is fully contracted and a check valve 104 to a hand-operated spring plunger supply valve and check valves to each prop and the release takes place through check valves, a hand-operated release valve 127 and check valves 134, 135 to either the chamber 99 or 102 which ever is at low pressure. The release valve contains an excess pressure release valve 131. The roof supports 14 have an adjustable stop in the shield 57 to limit the distance the support advances.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE545472D BE545472A (en) | 1955-02-23 | ||
GB5450/55A GB823127A (en) | 1955-02-23 | 1955-02-23 | Improvements in and relating to mine roof support systems |
US566712A US2803444A (en) | 1955-02-23 | 1956-02-20 | Mine roof support systems |
NL204785A NL204785A (en) | 1955-02-23 | 1956-02-22 | |
FR1146211D FR1146211A (en) | 1955-02-23 | 1956-02-23 | Method and installation of support for mine galleries |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5450/55A GB823127A (en) | 1955-02-23 | 1955-02-23 | Improvements in and relating to mine roof support systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB823127A true GB823127A (en) | 1959-11-04 |
Family
ID=9796410
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5450/55A Expired GB823127A (en) | 1955-02-23 | 1955-02-23 | Improvements in and relating to mine roof support systems |
Country Status (5)
Country | Link |
---|---|
US (1) | US2803444A (en) |
BE (1) | BE545472A (en) |
FR (1) | FR1146211A (en) |
GB (1) | GB823127A (en) |
NL (1) | NL204785A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1170354B (en) * | 1960-07-13 | 1964-05-21 | Rheinstahl Gmbh Wanheim | Guide device for mechanically retractable expansion frames |
DE1199725B (en) * | 1962-02-07 | 1965-09-02 | Maschf | Longwall construction, consisting of frame-like, height-adjustable support frames set up at a distance from one another, which can be pulled forward by means of back cylinders |
DE1280183B (en) * | 1964-11-17 | 1968-10-17 | Dowty Mining Equipment Ltd | Wandering longwall mining |
DE1280785B (en) * | 1963-01-14 | 1968-10-24 | Becorit Grubenausbau Gmbh | Hiking pillar expansion for underground mining operations |
CN103557024A (en) * | 2013-11-19 | 2014-02-05 | 辽宁鑫丰矿电设备制造有限公司 | Foldable direction-changing withdrawing platform |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2910282A (en) * | 1957-07-15 | 1959-10-27 | Dowty Mining Equipment Ltd | Mine roof support devices |
DE1182184B (en) * | 1957-12-24 | 1964-11-26 | Emil Weber | Facility for gradual longwall mining |
DE1119803B (en) * | 1958-09-13 | 1961-12-21 | Rheinstahl Gmbh Wanheim | Mechanized longwall mining |
DE1142569B (en) * | 1959-10-09 | 1963-01-24 | Gewerk Eisenhuette Westfalia | Device for backing conveyors |
DE1103268B (en) * | 1959-10-31 | 1961-03-30 | Bwg Bergwerks Und Walzwerk Mas | Wandering support frame for the expansion of pit rooms |
DE1198307B (en) * | 1959-11-23 | 1965-08-12 | Nuesse & Graefer Maschf | Back process for backing up an extension in the form of extension racks and a conveyor |
DE1205036B (en) * | 1960-06-30 | 1965-11-18 | Kloeckner Werke Ag | Wandering longwall with frame |
DE1408718B1 (en) * | 1960-10-25 | 1972-12-14 | Gewerk Eisenhuette Westfalia | Back device for moving expansion elements |
US3333426A (en) * | 1964-04-11 | 1967-08-01 | Gullick Ltd | Self-advancing hydraulically extensible mine roof supports |
GB1391484A (en) * | 1972-03-24 | 1975-04-23 | Gullick Dobson Ltd | Mineral mining systems |
DE3824522A1 (en) * | 1988-07-20 | 1990-01-25 | Kloeckner Becorit Gmbh | METHOD FOR BACKING A STRUCTURAL BUILDING |
CN101787889B (en) * | 2010-03-18 | 2012-01-11 | 北京昊华能源股份有限公司 | Comprehensive mechanized coal mining method through cantilever support |
CN104453971B (en) * | 2014-12-09 | 2017-03-29 | 辽宁威跃集团机械制造有限公司 | Double assembling and dismantling install standby |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE18491E (en) * | 1932-06-14 | Method oe and means fob supporting roof strata during the mining oe | ||
US2657028A (en) * | 1949-06-15 | 1953-10-27 | Joy Mfg Co | Walking jack |
-
0
- BE BE545472D patent/BE545472A/fr unknown
-
1955
- 1955-02-23 GB GB5450/55A patent/GB823127A/en not_active Expired
-
1956
- 1956-02-20 US US566712A patent/US2803444A/en not_active Expired - Lifetime
- 1956-02-22 NL NL204785A patent/NL204785A/xx unknown
- 1956-02-23 FR FR1146211D patent/FR1146211A/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1170354B (en) * | 1960-07-13 | 1964-05-21 | Rheinstahl Gmbh Wanheim | Guide device for mechanically retractable expansion frames |
DE1199725B (en) * | 1962-02-07 | 1965-09-02 | Maschf | Longwall construction, consisting of frame-like, height-adjustable support frames set up at a distance from one another, which can be pulled forward by means of back cylinders |
DE1280785B (en) * | 1963-01-14 | 1968-10-24 | Becorit Grubenausbau Gmbh | Hiking pillar expansion for underground mining operations |
DE1280183B (en) * | 1964-11-17 | 1968-10-17 | Dowty Mining Equipment Ltd | Wandering longwall mining |
CN103557024A (en) * | 2013-11-19 | 2014-02-05 | 辽宁鑫丰矿电设备制造有限公司 | Foldable direction-changing withdrawing platform |
CN103557024B (en) * | 2013-11-19 | 2015-11-11 | 辽宁鑫丰矿电设备制造有限公司 | A kind of collapsible tuning withdraws platform |
Also Published As
Publication number | Publication date |
---|---|
US2803444A (en) | 1957-08-20 |
NL204785A (en) | 1963-10-15 |
BE545472A (en) | |
FR1146211A (en) | 1957-11-07 |
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