FR1340145A - Mine roof support - Google Patents

Mine roof support

Info

Publication number
FR1340145A
FR1340145A FR917620A FR917620A FR1340145A FR 1340145 A FR1340145 A FR 1340145A FR 917620 A FR917620 A FR 917620A FR 917620 A FR917620 A FR 917620A FR 1340145 A FR1340145 A FR 1340145A
Authority
FR
France
Prior art keywords
roof support
mine roof
mine
support
roof
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
FR917620A
Other languages
French (fr)
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.)
Dobson Ltd W E & F
WE&F Dobson Ltd
Original Assignee
Dobson Ltd W E & F
WE&F 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 Dobson Ltd W E & F, WE&F Dobson Ltd filed Critical Dobson Ltd W E & F
Priority to FR917620A priority Critical patent/FR1340145A/en
Application granted granted Critical
Publication of FR1340145A publication Critical patent/FR1340145A/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
    • E21D23/006—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
    • E21D23/0073—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 with advancing shifting devices connected therewith
    • 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
    • E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
    • E21D23/18—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices of advancing mechanisms
FR917620A 1962-12-05 1962-12-05 Mine roof support Expired FR1340145A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR917620A FR1340145A (en) 1962-12-05 1962-12-05 Mine roof support

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR917620A FR1340145A (en) 1962-12-05 1962-12-05 Mine roof support

Publications (1)

Publication Number Publication Date
FR1340145A true FR1340145A (en) 1963-10-11

Family

ID=8792171

Family Applications (1)

Application Number Title Priority Date Filing Date
FR917620A Expired FR1340145A (en) 1962-12-05 1962-12-05 Mine roof support

Country Status (1)

Country Link
FR (1) FR1340145A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3332246A (en) * 1963-12-02 1967-07-25 Stamicarbon Movable face support
US3333424A (en) * 1963-09-02 1967-08-01 Gewerk Eisenhuette Westfalia Travelling propping machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3333424A (en) * 1963-09-02 1967-08-01 Gewerk Eisenhuette Westfalia Travelling propping machine
US3332246A (en) * 1963-12-02 1967-07-25 Stamicarbon Movable face support

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