GB1234662A - - Google Patents

Info

Publication number
GB1234662A
GB1234662A GB1234662DA GB1234662A GB 1234662 A GB1234662 A GB 1234662A GB 1234662D A GB1234662D A GB 1234662DA GB 1234662 A GB1234662 A GB 1234662A
Authority
GB
United Kingdom
Prior art keywords
ram
advancing
cantilever extension
mine roof
roof
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
Application number
Other languages
English (en)
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 GB1234662A publication Critical patent/GB1234662A/en
Expired legal-status Critical Current

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
    • E21D23/0052—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
    • E21D17/00—Caps for supporting mine roofs
    • E21D17/02—Cantilever extension or similar protecting devices
    • E21D17/0206—Hydraulically operated extension 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)
  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Lining And Supports For Tunnels (AREA)
  • Tents Or Canopies (AREA)
  • Telescopes (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
GB1234662D 1968-01-25 1968-01-25 Expired GB1234662A (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB393768 1968-01-25

Publications (1)

Publication Number Publication Date
GB1234662A true GB1234662A (enrdf_load_stackoverflow) 1971-06-09

Family

ID=9767684

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1234662D Expired GB1234662A (enrdf_load_stackoverflow) 1968-01-25 1968-01-25

Country Status (3)

Country Link
JP (1) JPS493604B1 (enrdf_load_stackoverflow)
DE (1) DE1902490C3 (enrdf_load_stackoverflow)
GB (1) GB1234662A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4347021A (en) * 1979-05-08 1982-08-31 Gewerkschaft Eisenhutte Westfalia Mine roof supports

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4347021A (en) * 1979-05-08 1982-08-31 Gewerkschaft Eisenhutte Westfalia Mine roof supports

Also Published As

Publication number Publication date
DE1902490A1 (de) 1969-08-28
DE1902490B2 (de) 1975-01-09
JPS493604B1 (enrdf_load_stackoverflow) 1974-01-28
DE1902490C3 (de) 1975-08-14

Similar Documents

Publication Publication Date Title
GB1431609A (en) Mine roof support and shield structure
GB1429799A (en) Mine roof supports
GB1234661A (enrdf_load_stackoverflow)
GB1114472A (en) Improvements in or relating to mine roof supports
GB1474558A (en) Self-advancing mine roof supports
GB1234662A (enrdf_load_stackoverflow)
GB1069905A (en) Improvements relating to roof supports for mine workings
GB1037920A (en) Improvements relating to roof supports for mine workings
GB1124715A (en) Travelling longwall supporting assembly
GB1375562A (enrdf_load_stackoverflow)
GB1148916A (en) Mine roof supports
GB1133099A (en) Improvements relating to roof supports for mine workings
GB1269022A (en) Improvements in or relating to advancing mine roof supports
GB1216953A (en) Improvements in support assemblies for mineral mines
GB1103800A (en) Improvements relating to mechanically advancing mine roof support systems
GB1183238A (en) Improvements in or relating to Advancing Mine Roof Support Systems
GB1182925A (en) Improvements in or relating to Mine Roof Supports.
GB1004110A (en) Self-advancing support structure for a mine gallery roof
ES456824A1 (es) Escudo de cuchillas para la apertura de cavidades, en espe- cial de tuneles.
GB1482428A (en) Roof supports for mines or other workings
GB1271269A (en) Improvements in or relating to mine roof supports
GB1166241A (en) Inclined-Prop Powered Support.
GB1090247A (en) Improvements in or relating to mine roof supporting devices
GB1045353A (en) Improvements in or relating to mine roof supports
AU464341B2 (en) Improvements relating to advancing roof supports for mine workings

Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees