GB1435557A - Mineral mining installation - Google Patents

Mineral mining installation

Info

Publication number
GB1435557A
GB1435557A GB3608073A GB3608073A GB1435557A GB 1435557 A GB1435557 A GB 1435557A GB 3608073 A GB3608073 A GB 3608073A GB 3608073 A GB3608073 A GB 3608073A GB 1435557 A GB1435557 A GB 1435557A
Authority
GB
United Kingdom
Prior art keywords
conveyer
support unit
ram
pair
distance
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
GB3608073A
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.)
Gewerkschaft Eisenhutte Westfalia GmbH
Original Assignee
Gewerkschaft Eisenhutte Westfalia GmbH
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 Gewerkschaft Eisenhutte Westfalia GmbH filed Critical Gewerkschaft Eisenhutte Westfalia GmbH
Publication of GB1435557A publication Critical patent/GB1435557A/en
Expired legal-status Critical Current

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
    • E21D23/0052—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

Abstract

1435557 Mining conveyers GEWERKSCHAFT EISENHUTTE WESTFALIA 30 July 1973 [1 Aug 1972] 36080/73 Heading B8A In a mining installation comprising a conveyer 2 and a plurality of support units 1 in a longwall system wherein each unit 1 is provided with at least one roof support prop 15 and an advancing ram 3, the latter is capable of adopting either of two conditions when the support unit thereof is in an advanced position, namely a first condition in which movement of the conveyer towards the support unit is rigidly resisted and a second condition in which the conveyer is permitted to yield towards the support unit through a predetermined distance. The ram 3 acts on the conveyer by way of a pivotal cross-head 9 and a pair of bell crank levers 4 co-operating with brackets 5 having a pair of stop faces 10, 11. The ram 2 is also adapted to be connected by a valve 17 with an elastic pressure reservoir so that it can yield through a reserve stroke R equal to the distance X shown to allow passage of the winning machine. In a modification, see Figs. 3 and 4 (not shown), the bell crank lever system above is replaced by a pair of hydraulic aligning jacks disposed at the forward end of the bore of the support unit. The aligning jacks are pressurized to the same extent as the advancing jack and since their effective area of their pistons is at least twice as great as that of the piston of the advancing jack the latter has a reserve stroke R corresponding to the distance X allowed for " breathing " of the conveyer. Again the advancing jack and the aligning jacks may be connected by a valve with an elastic pressure reservoir according to the type of winning machine employed.
GB3608073A 1972-08-01 1973-07-30 Mineral mining installation Expired GB1435557A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2237798A DE2237798A1 (en) 1972-08-01 1972-08-01 STREBAASBAU

Publications (1)

Publication Number Publication Date
GB1435557A true GB1435557A (en) 1976-05-12

Family

ID=5852350

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3608073A Expired GB1435557A (en) 1972-08-01 1973-07-30 Mineral mining installation

Country Status (3)

Country Link
US (1) US3883179A (en)
DE (1) DE2237798A1 (en)
GB (1) GB1435557A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2268780A (en) * 1992-06-24 1994-01-19 Gullick Dobson Ltd Mining apparatus

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2461011C2 (en) * 1974-12-21 1977-01-20 Hemscheidt Maschf Hermann ALIGNMENT DEVICE FOR THE STAMP OF HYDRAULIC TREAD SUPPORTS
FR2478194A1 (en) * 1980-03-15 1981-09-18 Hemscheidt Maschf Hermann GUIDING DEVICE FOR WALKING BRIDGES
GB8704467D0 (en) * 1987-02-25 1987-04-01 Thorn Emi Appliances Electrically resistive tracks

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1792610U (en) * 1956-01-27 1959-07-30 Gewerk Eisenhuette Westfalia PROGRESSIVE EXPANSION FOR MOUNTAIN MALE EXTRACTIONS.
DE1277789B (en) * 1967-01-13 1968-09-19 Gewerk Eisenhuette Westfalia Hydraulically moving support frame

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2268780A (en) * 1992-06-24 1994-01-19 Gullick Dobson Ltd Mining apparatus

Also Published As

Publication number Publication date
US3883179A (en) 1975-05-13
DE2237798A1 (en) 1974-02-14

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee