GB1242776A - Improvements in or relating to self advancing mine roof supports - Google Patents

Improvements in or relating to self advancing mine roof supports

Info

Publication number
GB1242776A
GB1242776A GB5310869A GB5310869A GB1242776A GB 1242776 A GB1242776 A GB 1242776A GB 5310869 A GB5310869 A GB 5310869A GB 5310869 A GB5310869 A GB 5310869A GB 1242776 A GB1242776 A GB 1242776A
Authority
GB
United Kingdom
Prior art keywords
mine roof
roof supports
relating
supports
valve
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
GB5310869A
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.)
Gullick Dobson Ltd
Original Assignee
Gullick Dobson Ltd
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 Gullick Dobson Ltd filed Critical Gullick Dobson Ltd
Publication of GB1242776A publication Critical patent/GB1242776A/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
    • E21D23/006—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic 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)
  • Fluid-Pressure Circuits (AREA)
  • Lining And Supports For Tunnels (AREA)
  • Road Paving Structures (AREA)

Abstract

1,242,776. Advancing mine roof supports. GULLICK DOBSON Ltd. 30 Oct., 1969 [24 Dec., 1968], No. 53108/69. Heading E1P. To prevent sliding, down an inclined seam, two mine roof supports are interconnected by an extensible dash pot 6 such as a double acting piston and cylinder arrangement. The ends of the latter arrangement are pivotally connected to the supports and are interconnected via line 11 through a throttle and a closure valve 12, 13 provided on a further neighbouring support. The control system includes an accumulator 15 which can be bypassed by a valve 16, an air release valve 17 also being provided.
GB5310869A 1968-12-24 1969-10-30 Improvements in or relating to self advancing mine roof supports Expired GB1242776A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681816954 DE1816954A1 (en) 1968-12-24 1968-12-24 Wandering longwall construction for underground mining operations

Publications (1)

Publication Number Publication Date
GB1242776A true GB1242776A (en) 1971-08-11

Family

ID=5717377

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5310869A Expired GB1242776A (en) 1968-12-24 1969-10-30 Improvements in or relating to self advancing mine roof supports

Country Status (4)

Country Link
JP (1) JPS4916683B1 (en)
DE (1) DE1816954A1 (en)
GB (1) GB1242776A (en)
PL (1) PL80364B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3807107A (en) * 1972-04-24 1974-04-30 Robertson Co H H Closure spacer member and method of erecting a fixed frame assembly

Also Published As

Publication number Publication date
JPS4916683B1 (en) 1974-04-24
PL80364B1 (en) 1975-08-30
DE1816954A1 (en) 1972-03-02

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