ZA751797B - Improvements in or relating to self-advancing mine roof supports - Google Patents

Improvements in or relating to self-advancing mine roof supports

Info

Publication number
ZA751797B
ZA751797B ZA00751797A ZA751797A ZA751797B ZA 751797 B ZA751797 B ZA 751797B ZA 00751797 A ZA00751797 A ZA 00751797A ZA 751797 A ZA751797 A ZA 751797A ZA 751797 B ZA751797 B ZA 751797B
Authority
ZA
South Africa
Prior art keywords
relating
self
mine roof
roof supports
advancing mine
Prior art date
Application number
ZA00751797A
Other languages
English (en)
Inventor
J Cooke
D Alker
Original Assignee
Gullick Dobson Ltd
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 by Gullick Dobson Ltd filed Critical Gullick Dobson Ltd
Publication of ZA751797B publication Critical patent/ZA751797B/xx

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)
  • Burglar Alarm Systems (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Check Valves (AREA)
  • Basic Packing Technique (AREA)
  • Portable Nailing Machines And Staplers (AREA)
ZA00751797A 1974-04-10 1975-03-21 Improvements in or relating to self-advancing mine roof supports ZA751797B (en)

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 (1)

Publication Number Publication Date
ZA751797B true ZA751797B (en) 1976-02-25

Family

ID=10065839

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00751797A ZA751797B (en) 1974-04-10 1975-03-21 Improvements in or relating to self-advancing mine roof supports

Country Status (9)

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

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
ATE56592T1 (de) * 1985-05-16 1990-10-15 Memtec Ltd Beseitigung und gewinnung pflanzlicher polyphenole.
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系统
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
GB1500713A (en) 1978-02-08
CA1015961A (en) 1977-08-23
FR2267443B1 (xx) 1979-05-11
DE2510925C2 (de) 1982-11-04
AU7995075A (en) 1976-10-14
FR2267443A1 (xx) 1975-11-07
DE2510925A1 (de) 1975-10-23
AU496773B2 (en) 1978-10-26
JPS551440B2 (xx) 1980-01-14
ES436438A1 (es) 1977-01-01
JPS50136202A (xx) 1975-10-29
US3991578A (en) 1976-11-16

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