US3762172A - Mine roof support bar assemblies - Google Patents

Mine roof support bar assemblies Download PDF

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Publication number
US3762172A
US3762172A US00179373A US3762172DA US3762172A US 3762172 A US3762172 A US 3762172A US 00179373 A US00179373 A US 00179373A US 3762172D A US3762172D A US 3762172DA US 3762172 A US3762172 A US 3762172A
Authority
US
United States
Prior art keywords
bars
lugs
adjacent ends
mine roof
support bar
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 - Lifetime
Application number
US00179373A
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English (en)
Inventor
N Holken
H Rosenberg
E Hoffmann
H Koenig
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
Application granted granted Critical
Publication of US3762172A publication Critical patent/US3762172A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • E21D17/086—Cap joints for obtaining a coal-face free of pit-props or articulated type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/32—Articulated members
    • Y10T403/32254—Lockable at fixed position
    • Y10T403/32262—At selected angle
    • Y10T403/32319—At selected angle including pivot stud
    • Y10T403/32409—Members locked in axial alignment

Definitions

  • ABSTRACT A mine roof support bar assembly composed of two bars pivotably interconnected at adjacent ends with a hinge pin extending through lugs formed at these ends of the bars.
  • the axis of the pin lies above the longitudinal axes of the bars when the latter are arranged in a co-linear horizontal position.
  • the adjacent ends of the bars have interengageable extensions disposed beneath the lugs with a cavity formed between the extensions and the lugs. The extensions prevent the bars from pivoting downwards away from the horizontal position while the cavity can receive an insert body which is used to secure the bars in an upwardly inclined position.
  • hinged bars in conjunction with support frames in order to support the roof of a mine working.
  • rigid bar hinged bars have the advantage that when a prop or frame is being set in a support position the hinged bars come to rest directly against the roof over a greater length.
  • Hinged bars are usually utilized at the forward end of support frames nearest the mineral face being worked.
  • the forward bar facing towards the mineral face can be pivoted and clamped by some means in relation the rearmost bar supported by the prop of the frame so as to provide adequate support for the roof.
  • the front bar can be pivoted upwards or downwards as desired, in relation to the rear bar.
  • a general object of this invention is to provide an improved mine roof support bar assembly.
  • a mine roof support bar assembly comprising a first and a second bar, means for pivotably interconnecting the first and second bars, the bars being capable in use, of contacting and supporting a mine roof, and stop means formed on said bars to prevent the bars from becoming inclined from a co-linear relationship in a direction away from the mine roof.
  • the second bar of the assembly would be carried by a prop of a support frame and lie rearwardly of the first bar facing the mineral face.
  • the roof of the working does not as a general rule, subside immediately after the removal of the mineral. On the contrary, any noticeable subsidence of the roof is in most cases only observed at a certain distance from the mineral face, and generally afer a relatively long period of time. This is why, with a roof of normal formation downward pivoting of the front or first bar in relation to the rear or second bar should be precluded when the assembly is set. In the majority of cases the front bar already rests against the roof to an adequate extent even when it assumes a horizontal position in relation to the rear bar itself supported by the prop. If the roof subsides shortly after the removal of the mineral, the front bar should be pivoted upwards out of the horizontal position, when the frame is being set, so that the front bar comes to rest against the roof in front of the mineral face.
  • the assembly of the invention is thus particularly well adapted to these conditions and can follow the course taken by the roof, owing to the fact that the free ends of the bars can only be bent out of the horizontal position towards each other in the direction of the roof but not in the direction of the floor.
  • the bars preferably have overlapping lugs formed at their adjacent ends and a hinge pin extends through apertures in said lugs.
  • the stop means is preferably in the form of interengageable extensions provided at the adjacent ends of the bars beneath said lugs.
  • the axis of the hinge pin preferably lies above the common longitudinal axes of the bars in the direction of the mine roof.
  • a cavity is provided between the lugs and the extensions, said cavity being adapted to receive an insert body in order to set the bars in an inclined relationship towards the mine roof. Even when the bars are co-linearly aligned the insert body, which is preferably in the form of two wedge members, can absorb the pressures involved.
  • the assembly consists of a rear bar 10 and a front bar 1 1 pivotably interconnected by a hinge pin 12.
  • the .pin 12 is disposed above the common longitudinal centre of the bars 10, 11 and is received in aligned bores in two overlapping lugs 13, 14 formed at the ends of the two bars 10, 11 respectively.
  • the ends of the bars 10, 11 are provided with extensions 15, 16 which engage one another when the two bars 10, 1-1 are in the extended co-linear relationship as depicted in the drawing.
  • a cavity 17 is disposed between the lugs 13, 14 and the extensions 15, 16.
  • the two extensions l5, 16 thus act as stop means to prevent the two bars 10 and 11 from becoming inclined downwards. Nevertheless the bars 10,11 can be pivoted upwards. If, therefore, the roof of a mine working has subsided to a certain extent the lower part of the roof can be contacted by the rear bar 10, which in its turn is carried by a prop of a support frame, not shown in the drawing, while the front bar 11 can be pivoted upwards from the horizontal position until it comes to rest against the higher part of the roof. In order to secure the bar 11 in this higher position an insert body can be placed into the cavity 17.
  • the insert body is preferably in the form of two wedge members driven in from both sides of the assembly.
  • a mine roof support bar assembly of the type comprising a first elongate bar pivotably connected to a second elongate bar with a hinge .pin extending through overlapping apertured lugs at the adjacent ends of the bars; the improvement comprising complementary extension means at the adjacent ends of the bars said extension means disposed beneath and spaced through overlapping apertured lugs at the adjacent ends of the bars; the improvements comprising integral directly interengaging stop means at the adjacent ends of the bars for preventing relative downward pivoting of the bars when the longitudinal axes of the bars are in a substantially colinear relationship and a cavity means formed between said stop means and said lugs for receiving a separate insert to lock the bars in a position where the bars are relatively pivoted in an upward direction.

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)
  • Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
  • Bridges Or Land Bridges (AREA)
US00179373A 1970-09-11 1971-09-10 Mine roof support bar assemblies Expired - Lifetime US3762172A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE7033832U DE7033832U (de) 1970-09-11 1970-09-11 Gelenkkappe fuer einen wandernden ausbau von bergmaennischen gewinnungsbetrieben.

Publications (1)

Publication Number Publication Date
US3762172A true US3762172A (en) 1973-10-02

Family

ID=6614289

Family Applications (1)

Application Number Title Priority Date Filing Date
US00179373A Expired - Lifetime US3762172A (en) 1970-09-11 1971-09-10 Mine roof support bar assemblies

Country Status (5)

Country Link
US (1) US3762172A (forum.php)
BE (1) BE772469A (forum.php)
CS (1) CS156521B2 (forum.php)
DE (1) DE7033832U (forum.php)
FR (1) FR2107814B2 (forum.php)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB660738A (en) * 1948-07-30 1951-11-14 Hans Gerlach Improvements in or relating to pit supports
GB699297A (en) * 1948-10-01 1953-11-04 Groetschel Karl Maria Improvements in and relating to couplings for lagging irons for supporting mine roofs
DE1033613B (de) * 1946-07-23 1958-07-10 Dipl Berging Karl Maria Groets Schloss von gelenkig miteinander verbundenen Schaleisen fuer den wanderden Strebausbau
DE1086199B (de) * 1954-11-26 1960-08-04 August Fischer Dipl Ing Strebausbau
US2991102A (en) * 1948-07-08 1961-07-04 Eisenwerk Wanheim G M B H Fa Connecting structure for beams of a roof support or the like
GB900508A (en) * 1959-03-04 1962-07-04 Gerlach Karl Improvements in or relating to pit props and roof supporting systems comprising the same
US3312071A (en) * 1965-05-08 1967-04-04 Gewerk Eisenhuette Westfalia Mine roof support cap with cantilever projection member
US3447327A (en) * 1966-01-19 1969-06-03 Stamicarbon Movable face support
US3455113A (en) * 1966-08-11 1969-07-15 Gewerk Eisenhuette Westfalia Multi-sectional roof cap for mine roof supporting prop means

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1033613B (de) * 1946-07-23 1958-07-10 Dipl Berging Karl Maria Groets Schloss von gelenkig miteinander verbundenen Schaleisen fuer den wanderden Strebausbau
US2991102A (en) * 1948-07-08 1961-07-04 Eisenwerk Wanheim G M B H Fa Connecting structure for beams of a roof support or the like
GB660738A (en) * 1948-07-30 1951-11-14 Hans Gerlach Improvements in or relating to pit supports
GB699297A (en) * 1948-10-01 1953-11-04 Groetschel Karl Maria Improvements in and relating to couplings for lagging irons for supporting mine roofs
DE1086199B (de) * 1954-11-26 1960-08-04 August Fischer Dipl Ing Strebausbau
GB900508A (en) * 1959-03-04 1962-07-04 Gerlach Karl Improvements in or relating to pit props and roof supporting systems comprising the same
US3312071A (en) * 1965-05-08 1967-04-04 Gewerk Eisenhuette Westfalia Mine roof support cap with cantilever projection member
US3447327A (en) * 1966-01-19 1969-06-03 Stamicarbon Movable face support
US3455113A (en) * 1966-08-11 1969-07-15 Gewerk Eisenhuette Westfalia Multi-sectional roof cap for mine roof supporting prop means

Also Published As

Publication number Publication date
FR2107814A2 (forum.php) 1972-05-12
CS156521B2 (forum.php) 1974-07-24
DE7033832U (de) 1971-01-28
FR2107814B2 (forum.php) 1977-01-21
BE772469A (fr) 1972-01-17

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