NL6503406A - - Google Patents
Info
- Publication number
- NL6503406A NL6503406A NL6503406A NL6503406A NL6503406A NL 6503406 A NL6503406 A NL 6503406A NL 6503406 A NL6503406 A NL 6503406A NL 6503406 A NL6503406 A NL 6503406A NL 6503406 A NL6503406 A NL 6503406A
- Authority
- NL
- Netherlands
- Prior art keywords
- valve
- ram
- pressure
- line
- fluid
- Prior art date
Links
- 239000003245 coal Substances 0.000 abstract 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
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
-
- 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
- E21D23/0052—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 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
- E21D23/08—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
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)
- Actuator (AREA)
- Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
- Press Drives And Press Lines (AREA)
Abstract
1, 098, 628. Mine roof supports. COAL INDUSTRY (PATENTS) Ltd. March 16, 1965 [March 20, 1964], No. 11932/64. Addition to 967,163. Heading F1P. A mine roof support has a hydraulic roof support member 2 and a horizontal advancing ram 1, a control valve 6 actuated by pressure acting on the ram 1 from a supply 3 to lower the member 2 by allowing fluid to escape from it to a return line 4, and a second control valve 8 actuated at a predetermined positional setting of the ram, e.g. by an abutment 18 on the ram engaging the valve, to over-ride the valve 6 to raise the member 2. The operation is started by opening a valve 5, and fluid-pressure then opens the valve 6, and advances the ram 1. When the valve 8 is opened, the pressure is transmitted along a line 9 to close the valve 6, and through a non-return valve 11 to raise the member 2. The valve 8 and abutment 18 may be replaced by an opening in the ram cylinder, connected to the lines 9 and 12 and uncovered by the piston near the end of its stroke. The valve 5 may be opened by fluid-pressure, e.g. from the line 9 of an adjacent unit, the units then operating sequentially Fig. 2 (not shown). In another embodiment Fig. 3 (not shown) the line 9 leads through a two-way fluid-pressure operated valve to the valves 5 of an adjacent unit on each side and the units are operable sequentially either from left or right or right to left. Reference has been directed by the Comptroller to Specification 967,164.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB11932/64A GB1098628A (en) | 1964-03-20 | 1964-03-20 | Improvements in or relating to advancing roof supports |
Publications (1)
Publication Number | Publication Date |
---|---|
NL6503406A true NL6503406A (en) | 1965-09-21 |
Family
ID=9995302
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL256189D NL256189A (en) | 1964-03-20 | ||
NL6503406A NL6503406A (en) | 1964-03-20 | 1965-03-17 |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL256189D NL256189A (en) | 1964-03-20 |
Country Status (5)
Country | Link |
---|---|
US (1) | US3313211A (en) |
DE (2) | DE1205034B (en) |
FR (1) | FR1268264A (en) |
GB (2) | GB967163A (en) |
NL (2) | NL6503406A (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1458672B1 (en) * | 1951-01-28 | 1970-02-26 | Becorit Grubenausbau Gmbh | Control for a migrating hydraulic longwall construction |
DE2901054A1 (en) * | 1979-01-12 | 1980-07-17 | Salzgitter Maschinen Ag | PROVISIONAL REMOTE EXTENSION FOR CONSTRUCTION OPERATIONS IN ROUTES OF UNDERGROUND MINING |
GB2116618B (en) * | 1982-03-06 | 1985-11-20 | Dowty Mining Equipment Ltd | Mine roof supports |
DE202010001750U1 (en) | 2010-02-02 | 2010-06-10 | Karl Hamacher Gmbh | Underground media supply arrangement |
CN110333017B (en) * | 2019-07-29 | 2020-12-01 | 宿州市金鼎安全技术股份有限公司 | Coal mine tunnel roof stress monitoring device based on fiber grating sensor |
CN110778346B (en) * | 2019-11-15 | 2020-07-03 | 西部黄金伊犁有限责任公司 | Protection device for mine roof fall |
CN111878140A (en) * | 2020-06-05 | 2020-11-03 | 范文 | Hydraulic support for thin coal seam mining |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1069548B (en) * | 1959-11-26 | |||
US1994974A (en) * | 1930-06-21 | 1935-03-19 | Oilgear Co | Differential resistance valve |
US2714505A (en) * | 1948-05-01 | 1955-08-02 | Joy Mfg Co | Apparatus for mine roof control |
US2657028A (en) * | 1949-06-15 | 1953-10-27 | Joy Mfg Co | Walking jack |
GB735294A (en) * | 1952-03-04 | 1955-08-17 | Bolton & Company Engineers Ltd | Improvements relating to fluid-operated roof-supporting units for use in mines and like places |
GB742850A (en) * | 1952-12-06 | 1956-01-04 | Hydrauliques Pour L Ind Minier | Improved device for supporting the roofs of mine galleries |
GB745679A (en) * | 1953-07-08 | 1956-02-29 | Dowty Auto Units Ltd | Improvements in mine roof supports |
AT184539B (en) * | 1954-04-12 | 1956-01-25 | Kloeckner Bergbau Victor Icker | Wandering expansion with expansion spans actuated by a pressure medium |
GB823128A (en) * | 1955-02-23 | 1959-11-04 | Dowty Mining Equipment Ltd | Improvements in and relating to mine roof support systems |
US2859022A (en) * | 1955-04-04 | 1958-11-04 | Dowty Mining Equipment Ltd | Hydraulic roof supports and conveyor feed jacks |
FR1153880A (en) * | 1955-04-04 | 1958-03-28 | Dowty Mining Equipment Ltd | Installation and hydraulic support for mines |
FR1148920A (en) * | 1956-03-21 | 1957-12-18 | Automatic activation control of one or more self-propelled props | |
FR1184882A (en) * | 1956-10-19 | 1959-07-27 | Eisenwerk Wanheim Gmbh | Mechanized support with hydraulic props grouped in double groups |
FR1190532A (en) * | 1957-07-05 | 1959-10-13 | Dobson Ltd W E & F | Improvements to ceiling supports for underground mines |
FR1201174A (en) * | 1957-08-10 | 1959-12-29 | Gewerk Eisenhuette Westfalia | Method and device for controlling a hydraulic support, usable in particular in mines |
DE1131626B (en) * | 1958-04-14 | 1962-06-20 | Kloeckner Werke Ag | Method and device for controlling the robbery and setting process of hydraulic longwall construction frames |
US2989950A (en) * | 1958-06-04 | 1961-06-27 | Lockman Nathan | Pneumatic control device |
FR1271386A (en) * | 1959-10-12 | 1961-09-08 | Coal Industry Patents Ltd | Roof supports for mining galleries |
FR1337134A (en) * | 1961-10-30 | 1963-09-06 | Dowty Mining Equipment Ltd | Improvements to mine roof supports |
GB991009A (en) * | 1962-06-07 | 1965-05-05 | Dowty Mining Equipment Ltd | Mining apparatus |
-
0
- NL NL256189D patent/NL256189A/xx unknown
-
1959
- 1959-09-25 GB GB32684/59A patent/GB967163A/en not_active Expired
-
1960
- 1960-09-17 DE DEC22366A patent/DE1205034B/en active Pending
- 1960-09-24 FR FR839475A patent/FR1268264A/en not_active Expired
-
1964
- 1964-03-20 GB GB11932/64A patent/GB1098628A/en not_active Expired
-
1965
- 1965-03-11 US US439026A patent/US3313211A/en not_active Expired - Lifetime
- 1965-03-15 DE DE1965C0035321 patent/DE1292605C2/en not_active Expired
- 1965-03-17 NL NL6503406A patent/NL6503406A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
GB1098628A (en) | 1968-01-10 |
DE1292605C2 (en) | 1973-05-17 |
DE1292605B (en) | 1969-04-17 |
NL256189A (en) | |
FR1268264A (en) | 1961-07-28 |
DE1205034B (en) | 1965-11-18 |
GB967163A (en) | 1964-08-19 |
US3313211A (en) | 1967-04-11 |
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