NL256189A - - Google Patents

Info

Publication number
NL256189A
NL256189A NL256189DA NL256189A NL 256189 A NL256189 A NL 256189A NL 256189D A NL256189D A NL 256189DA NL 256189 A NL256189 A NL 256189A
Authority
NL
Netherlands
Prior art keywords
valve
ram
pressure
line
fluid
Prior art date
Application number
Priority date (The priority date 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 date listed.)
Publication of NL256189A publication Critical patent/NL256189A/xx

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
    • E21D23/16—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)
  • Press Drives And Press Lines (AREA)
  • Carriers, Traveling Bodies, And Overhead Traveling Cranes (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.
NL256189D 1964-03-20 NL256189A (en)

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
NL256189A true NL256189A (en)

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 After (1)

Application Number Title Priority Date Filing Date
NL6503406A NL6503406A (en) 1964-03-20 1965-03-17

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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
FR1153880A (en) * 1955-04-04 1958-03-28 Dowty Mining Equipment Ltd Installation and hydraulic support for mines
US2859022A (en) * 1955-04-04 1958-11-04 Dowty Mining Equipment Ltd Hydraulic roof supports and conveyor feed jacks
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

Also Published As

Publication number Publication date
GB967163A (en) 1964-08-19
DE1292605C2 (en) 1973-05-17
US3313211A (en) 1967-04-11
DE1292605B (en) 1969-04-17
FR1268264A (en) 1961-07-28
NL6503406A (en) 1965-09-21
GB1098628A (en) 1968-01-10
DE1205034B (en) 1965-11-18

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