GB1449493A - System for advancing supports - Google Patents

System for advancing supports

Info

Publication number
GB1449493A
GB1449493A GB4287273A GB4287273A GB1449493A GB 1449493 A GB1449493 A GB 1449493A GB 4287273 A GB4287273 A GB 4287273A GB 4287273 A GB4287273 A GB 4287273A GB 1449493 A GB1449493 A GB 1449493A
Authority
GB
United Kingdom
Prior art keywords
frame
jacks
articulated
mine roof
advance
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
GB4287273A
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
Priority to GB4287273A priority Critical patent/GB1449493A/en
Publication of GB1449493A publication Critical patent/GB1449493A/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
    • E21D23/0004—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor along the working face
    • E21D23/0017—Pile type supports
    • 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
    • E21D23/083—Advancing mechanisms forming parts of the roof supports acting on a firm abutment adapted thereto

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)
  • Excavating Of Shafts Or Tunnels (AREA)

Abstract

1449493 Advancing mine roof supports G ALACCHI 12 Sept 1973 42872/73 Heading E1P In an advancing mine roof support system comprising two frames 1, 2 interconnected to a common beam 3 for selective advance, each frame is coupled to the beam by two articulated jacks 18, 21 pivotally connected to a rod 13 which in turn is pivoted to brackets 15, 17 mounted on the frame and the beam respectively, the arangement being such that when the jacks are supplied with the same amount of fluid maintains the correct line of advance. Each support frame is provided with props 6, 7 and a connecting jack 8 interconnecting the upper and lower frame elements, the former frame element having an articulated roofengaging member provided with a cushion of water under pressure.
GB4287273A 1973-09-12 1973-09-12 System for advancing supports Expired GB1449493A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4287273A GB1449493A (en) 1973-09-12 1973-09-12 System for advancing supports

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4287273A GB1449493A (en) 1973-09-12 1973-09-12 System for advancing supports

Publications (1)

Publication Number Publication Date
GB1449493A true GB1449493A (en) 1976-09-15

Family

ID=10426331

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4287273A Expired GB1449493A (en) 1973-09-12 1973-09-12 System for advancing supports

Country Status (1)

Country Link
GB (1) GB1449493A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2478194A1 (en) * 1980-03-15 1981-09-18 Hemscheidt Maschf Hermann GUIDING DEVICE FOR WALKING BRIDGES

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2478194A1 (en) * 1980-03-15 1981-09-18 Hemscheidt Maschf Hermann GUIDING DEVICE FOR WALKING BRIDGES

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Legal Events

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