GB1108710A - Improvements in or relating to self-advancing mine roof supports - Google Patents
Improvements in or relating to self-advancing mine roof supportsInfo
- Publication number
- GB1108710A GB1108710A GB55482/66A GB5548266A GB1108710A GB 1108710 A GB1108710 A GB 1108710A GB 55482/66 A GB55482/66 A GB 55482/66A GB 5548266 A GB5548266 A GB 5548266A GB 1108710 A GB1108710 A GB 1108710A
- Authority
- GB
- United Kingdom
- Prior art keywords
- line
- conveyer
- mine roof
- valve
- props
- 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 2
- 239000003245 coal 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
- E21D23/0073—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 with advancing shifting devices connected therewith
-
- 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
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting 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)
- Fluid-Pressure Circuits (AREA)
- Framework For Endless Conveyors (AREA)
Abstract
1,108,710. Advancing mine roof supports. GULLICK Ltd. Dec.12, 1966 [Dec.22, 1965], No.55482/66. Heading F1P. The canopy 12 of hydraulic mine roof support props 11 is urged against the roof during advancement towards the coal face by a hydraulic ram 13 anchored to the conveyer C by pressure of fluid exhausted from the pushing end 13a of the ram admitted through a line 20 to the base of the props; the line 20 having a relief valve 23 which opens to a return line at a predetermined pressure rise in line 20 which occurs when the canopy meets an obstruction 25. Line 20 includes an optional check valve 21, a valve 18 to direct pressure fluid from a main 16 to the props during advance of the conveyer and a valve 17 to direct fluidpressure from a second main 17 to the pushing end of ram 13 for said conveyer advancement.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB0085095 | 1965-12-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1108710A true GB1108710A (en) | 1968-04-03 |
Family
ID=6982747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB55482/66A Expired GB1108710A (en) | 1965-12-22 | 1966-12-12 | Improvements in or relating to self-advancing mine roof supports |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3395616A (en) |
| AT (1) | AT274711B (en) |
| FR (1) | FR1505297A (en) |
| GB (1) | GB1108710A (en) |
-
1966
- 1966-11-07 AT AT1030466A patent/AT274711B/en active
- 1966-12-12 US US600984A patent/US3395616A/en not_active Expired - Lifetime
- 1966-12-12 GB GB55482/66A patent/GB1108710A/en not_active Expired
- 1966-12-21 FR FR88392A patent/FR1505297A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| AT274711B (en) | 1969-09-25 |
| FR1505297A (en) | 1967-12-08 |
| US3395616A (en) | 1968-08-06 |
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