GB946939A - Improvements in or relating to coal-face supports - Google Patents

Improvements in or relating to coal-face supports

Info

Publication number
GB946939A
GB946939A GB3717360A GB3717360A GB946939A GB 946939 A GB946939 A GB 946939A GB 3717360 A GB3717360 A GB 3717360A GB 3717360 A GB3717360 A GB 3717360A GB 946939 A GB946939 A GB 946939A
Authority
GB
United Kingdom
Prior art keywords
coal
relating
lazytongs
oct
mine 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
GB3717360A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB946939A publication Critical patent/GB946939A/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
    • 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)
  • Framework For Endless Conveyors (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)

Abstract

946,939. Advancing mine roof supports. A. HAARMANN. Oct. 28, 1960 [Oct. 29, 1959], No. 37173/60. Heading E1E. An advancing mine roof support comprises pit props 3 - - 8 connected to a conveyer 2 by lazytongs such as 9 which are disposed level with the floor and are selectively advanced in block or alternate fashion by pneumatic or hydraulic cylinders. The bottom limb of the lazytongs slides along the sole plate of the prop be means of a roller, see Fig. 3 (not shown).
GB3717360A 1959-10-29 1960-10-28 Improvements in or relating to coal-face supports Expired GB946939A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEH0037766 1959-10-29

Publications (1)

Publication Number Publication Date
GB946939A true GB946939A (en) 1964-01-15

Family

ID=7153436

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3717360A Expired GB946939A (en) 1959-10-29 1960-10-28 Improvements in or relating to coal-face supports

Country Status (1)

Country Link
GB (1) GB946939A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3848928A (en) * 1973-02-12 1974-11-19 Taiheiyo Coal Mining Co Ltd Pantographic wall protector and automatic controlling device thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3848928A (en) * 1973-02-12 1974-11-19 Taiheiyo Coal Mining Co Ltd Pantographic wall protector and automatic controlling device thereof

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