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GB779463A - Improved collapsible chock for use in mines - Google Patents

Improved collapsible chock for use in mines

Info

Publication number
GB779463A
GB779463A GB11978/55A GB1197855A GB779463A GB 779463 A GB779463 A GB 779463A GB 11978/55 A GB11978/55 A GB 11978/55A GB 1197855 A GB1197855 A GB 1197855A GB 779463 A GB779463 A GB 779463A
Authority
GB
United Kingdom
Prior art keywords
wedge
bar
lock
wedges
cylinder
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
GB11978/55A
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.)
LE PROGRES CHARBONNIER PROCHAR
Original Assignee
LE PROGRES CHARBONNIER PROCHAR
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 LE PROGRES CHARBONNIER PROCHAR filed Critical LE PROGRES CHARBONNIER PROCHAR
Publication of GB779463A publication Critical patent/GB779463A/en
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
    • E21D15/14—Telescopic props
    • E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
    • 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
    • E21D15/14—Telescopic props
    • E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
    • E21D15/285—Telescopic props with parts held relatively to each other by friction or gripping by means of wedges or wedge combinations
    • 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
    • E21D15/48—Chocks or the like
    • E21D15/486—Chocks or the like with essential hydraulic or pneumatic details
    • 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
    • E21D15/586—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 the props being pre-loaded
    • 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
    • E21D15/60—Devices for withdrawing props or chocks
    • E21D15/603—Devices for withdrawing props or chocks by means of hydraulic devices
    • 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
    • E21D17/08—Cap joints for obtaining a coal-face free of pit-props
    • E21D17/082—Cap joints for obtaining a coal-face free of pit-props of sliding type

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)
  • Clamps And Clips (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Abstract

779,463. Chocks for mines. PROGRES CHARBONNIER PROCHAR SOC. COOPERATIVE. April 26, 1955 [April 30, 1954, Sept. 11, 1954], No. 11978/55. Class 20(2) A collapsible roof-supporting chock comprises superposed wedges provided with either friction-type or hydraulic braking means for braking their relative sliding movement under pressure of the roof. The friction-type braking means comprises a bar attached to one of the wedges and clamped in a lock coacting with the other wedge. In one form, Fig. 1, the bar 4 extends obliquely through slots in the wedges 1, 2 and is pivoted at 9 to one wedge, the lock 5 tightened by a wedge 6, bearing against the other wedge. The bar may be laminated and is either uniform or tapered. In a modification the bar is fixed at both ends to the wedge 2, parallel to the sliding surface, and passes through a lock secured to the wedge 1; the lock may be of the friction type 5, or it may be actuated by a hydraulic device, Fig. 8, comprising a cylinder 13, piston 14, and brake .shoe 15 which clamps the bar 16 against the base 18 of the cylinder. In a further modification, Fig. 10, the hydraulic device itself constitutes the braking means and comprises a cylinder 13 mounted in the wedge 1, a piston 14, and a piston rod 20 attached to the lower wedge by a pivot 17 either at the lower or upper part of the wedge. Sliding girders 23 are provided on the upper face of the wedge 1. Girders 23 are slidable in lugs On the wedge 1.
GB11978/55A 1954-04-30 1955-04-26 Improved collapsible chock for use in mines Expired GB779463A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE779463X 1954-04-30

Publications (1)

Publication Number Publication Date
GB779463A true GB779463A (en) 1957-07-24

Family

ID=3880376

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11978/55A Expired GB779463A (en) 1954-04-30 1955-04-26 Improved collapsible chock for use in mines

Country Status (2)

Country Link
BE (2) BE531795A (en)
GB (1) GB779463A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112392519A (en) * 2019-08-12 2021-02-23 山东东安云矿业科技有限公司 Method and equipment for circularly supporting roadway excavation support

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0155236B1 (en) * 1984-03-12 1989-07-12 HIRMANN, Georg Force shifting device
IT1229014B (en) * 1989-04-14 1991-07-12 Elba 2 S R L EQUIPMENT FOR HANDLING GOODS ON INDUSTRIAL VEHICLES.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112392519A (en) * 2019-08-12 2021-02-23 山东东安云矿业科技有限公司 Method and equipment for circularly supporting roadway excavation support

Also Published As

Publication number Publication date
BE531795A (en)
BE528553A (en)

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