AT360935B - EXTENSION BLOCK - Google Patents

EXTENSION BLOCK

Info

Publication number
AT360935B
AT360935B AT333079A AT333079A AT360935B AT 360935 B AT360935 B AT 360935B AT 333079 A AT333079 A AT 333079A AT 333079 A AT333079 A AT 333079A AT 360935 B AT360935 B AT 360935B
Authority
AT
Austria
Prior art keywords
extension block
extension
block
Prior art date
Application number
AT333079A
Other languages
German (de)
Other versions
ATA333079A (en
Inventor
Gottfried Siebenhofer
Original Assignee
Voest Alpine Ag
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 Voest Alpine Ag filed Critical Voest Alpine Ag
Priority to AT333079A priority Critical patent/AT360935B/en
Priority to GB8012575A priority patent/GB2050482A/en
Priority to DE19803015664 priority patent/DE3015664A1/en
Priority to PL22379680A priority patent/PL223796A1/xx
Publication of ATA333079A publication Critical patent/ATA333079A/en
Application granted granted Critical
Publication of AT360935B publication Critical patent/AT360935B/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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
    • E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
    • E21D23/0454—Trailing plates; Coal face or goaf side sprags
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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
    • E21D23/0034—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 comprising a goaf shield articulated to a base member
    • E21D23/0039—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 comprising a goaf shield articulated to a base member and supported by a strut or by a row of struts parallel to the working face
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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
    • E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
    • E21D23/06—Special mine caps or special tops of pit-props for permitting step-by-step movement
    • E21D23/066—Pivoted cantilever extensions therefor
AT333079A 1979-05-03 1979-05-03 EXTENSION BLOCK AT360935B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AT333079A AT360935B (en) 1979-05-03 1979-05-03 EXTENSION BLOCK
GB8012575A GB2050482A (en) 1979-05-03 1980-04-16 Improvements in or Relating to Supporting Jacks
DE19803015664 DE3015664A1 (en) 1979-05-03 1980-04-23 EXTENSION BLOCK
PL22379680A PL223796A1 (en) 1979-05-03 1980-04-26

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT333079A AT360935B (en) 1979-05-03 1979-05-03 EXTENSION BLOCK

Publications (2)

Publication Number Publication Date
ATA333079A ATA333079A (en) 1980-07-15
AT360935B true AT360935B (en) 1981-02-10

Family

ID=3548895

Family Applications (1)

Application Number Title Priority Date Filing Date
AT333079A AT360935B (en) 1979-05-03 1979-05-03 EXTENSION BLOCK

Country Status (4)

Country Link
AT (1) AT360935B (en)
DE (1) DE3015664A1 (en)
GB (1) GB2050482A (en)
PL (1) PL223796A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3107209A1 (en) * 1981-02-26 1982-09-09 Gewerkschaft Eisenhütte Westfalia, 4670 Lünen CAP ACTUATOR
FR2576058B1 (en) * 1985-01-15 1987-12-31 Bennes Marrel WALKING SUPPORT PILE, ESPECIALLY FOR MINES
DE3530482A1 (en) * 1985-08-27 1987-03-12 Ruhrkohle Ag Stringer for the forepoling of the roadway support in underground working
GB2182704B (en) * 1985-11-08 1989-01-18 Dobson Park Ind Mine roof supports
GB2188665B (en) * 1986-04-01 1990-02-21 Dobson Park Ind Mine roof supports
GB8703496D0 (en) * 1987-02-14 1987-03-18 Dowty Mining Equipment Ltd Mine roof support
GB8707235D0 (en) * 1987-03-26 1987-04-29 Dowty Hucknall Ltd Roof support
AU2016409814B2 (en) * 2016-06-10 2022-08-11 Sandvik Intellectual Property Ab Active temporary roof support apparatus

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2709225C2 (en) * 1977-03-03 1979-04-12 Hermann Hemscheidt Maschinenfabrik Gmbh & Co, 5600 Wuppertal Pre-pledge device for hydraulic support
DE2727414C2 (en) * 1977-06-18 1979-07-12 Hermann Hemscheidt Maschinenfabrik Gmbh & Co, 5600 Wuppertal Pre-pledge device for hydraulic support
DE2819172C2 (en) * 1978-05-02 1985-01-24 Hermann Hemscheidt Maschinenfabrik Gmbh & Co, 5600 Wuppertal Pre-pledge device for hydraulic support

Also Published As

Publication number Publication date
GB2050482A (en) 1981-01-07
DE3015664A1 (en) 1980-11-13
ATA333079A (en) 1980-07-15
PL223796A1 (en) 1981-02-27

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Legal Events

Date Code Title Description
ELJ Ceased due to non-payment of the annual fee
ELJ Ceased due to non-payment of the annual fee