JPS551440B2 - - Google Patents

Info

Publication number
JPS551440B2
JPS551440B2 JP4135575A JP4135575A JPS551440B2 JP S551440 B2 JPS551440 B2 JP S551440B2 JP 4135575 A JP4135575 A JP 4135575A JP 4135575 A JP4135575 A JP 4135575A JP S551440 B2 JPS551440 B2 JP S551440B2
Authority
JP
Japan
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
Application number
JP4135575A
Other versions
JPS50136202A (ja
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.)
Filing date
Publication date
Application filed filed Critical
Publication of JPS50136202A publication Critical patent/JPS50136202A/ja
Publication of JPS551440B2 publication Critical patent/JPS551440B2/ja
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/58—Devices for setting props or chocks
    • E21D15/585—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important
    • 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
    • E21D23/26—Hydraulic or pneumatic control

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)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Lining And Supports For Tunnels (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Burglar Alarm Systems (AREA)
  • Basic Packing Technique (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Check Valves (AREA)
JP4135575A 1974-04-10 1975-04-07 Expired JPS551440B2 (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB15807/74A GB1500713A (en) 1974-04-10 1974-04-10 Control means for mine roof supports

Publications (2)

Publication Number Publication Date
JPS50136202A JPS50136202A (ja) 1975-10-29
JPS551440B2 true JPS551440B2 (ja) 1980-01-14

Family

ID=10065839

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4135575A Expired JPS551440B2 (ja) 1974-04-10 1975-04-07

Country Status (9)

Country Link
US (1) US3991578A (ja)
JP (1) JPS551440B2 (ja)
AU (1) AU496773B2 (ja)
CA (1) CA1015961A (ja)
DE (1) DE2510925C2 (ja)
ES (1) ES436438A1 (ja)
FR (1) FR2267443B1 (ja)
GB (1) GB1500713A (ja)
ZA (1) ZA751797B (ja)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4248260A (en) * 1978-08-21 1981-02-03 Addison Carl E Control device for center pivot irrigation units
GB2137314B (en) * 1983-03-26 1986-07-23 Dobson Park Ind Valve for mine support
AU590281B2 (en) * 1985-05-16 1989-11-02 Memtec Limited Removing colourants with polyamides
GB2201227B (en) * 1987-02-18 1991-05-22 Ferranti Plc Hydraulic valve
EP2378059B1 (en) * 2010-04-16 2012-12-05 S.A. Armstrong Limited Improvements in and relating to long wall hydraulic supply systems
CN110410115B (zh) * 2019-07-22 2020-11-17 天地科技股份有限公司 一种立柱压力自适应调控***
CN111911216B (zh) * 2020-06-19 2022-02-11 太原理工大学 一种具有流量连续调节功能的方向流量阀及其控制方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB959492A (en) * 1961-11-21 1964-06-03 Dowty Technical Developements Mining apparatus
US3228199A (en) * 1962-05-30 1966-01-11 Dowty Mining Equipment Ltd Mining apparatus
GB1063455A (en) * 1964-05-15 1967-03-30 Dowty Mining Equipment Ltd Roof support assembly suitable for use in mines
GB1182252A (en) * 1966-03-22 1970-02-25 Gullick Ltd Improvements in or relating to Mine Roof Support Systems.
DE1277787B (de) * 1967-03-30 1968-09-19 Bergwerksverband Gmbh Einrichtung zur Zeitplansteuerung von hydraulischem Grubenausbau
US3601998A (en) * 1969-02-19 1971-08-31 Wild A G & Co Ltd Control of mine roof support assemblies

Also Published As

Publication number Publication date
ES436438A1 (es) 1977-01-01
GB1500713A (en) 1978-02-08
DE2510925A1 (de) 1975-10-23
DE2510925C2 (de) 1982-11-04
AU496773B2 (en) 1978-10-26
FR2267443A1 (ja) 1975-11-07
US3991578A (en) 1976-11-16
FR2267443B1 (ja) 1979-05-11
ZA751797B (en) 1976-02-25
AU7995075A (en) 1976-10-14
CA1015961A (en) 1977-08-23
JPS50136202A (ja) 1975-10-29

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