EP0036449B1 - Trough sections for mine supports - Google Patents

Trough sections for mine supports Download PDF

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Publication number
EP0036449B1
EP0036449B1 EP80107969A EP80107969A EP0036449B1 EP 0036449 B1 EP0036449 B1 EP 0036449B1 EP 80107969 A EP80107969 A EP 80107969A EP 80107969 A EP80107969 A EP 80107969A EP 0036449 B1 EP0036449 B1 EP 0036449B1
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EP
European Patent Office
Prior art keywords
profile member
base
profile
thickness
ellipse
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
EP80107969A
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German (de)
French (fr)
Other versions
EP0036449A1 (en
Inventor
Heinz Hofmann
Wilhelm Ing. Grad. Striepeke
Manfred Dipl.-Ing. Werner
Herbert Dipl.-Berging. Kleinherne
Christoph Dipl.-Berging. Zillessen
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.)
Fried Krupp AG Hoesch Krupp
RAG AG
Original Assignee
Ruhrkohle AG
Hoesch 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 Ruhrkohle AG, Hoesch AG filed Critical Ruhrkohle AG
Publication of EP0036449A1 publication Critical patent/EP0036449A1/en
Application granted granted Critical
Publication of EP0036449B1 publication Critical patent/EP0036449B1/en
Expired 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
    • E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/14—Lining predominantly with metal
    • E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/14—Lining predominantly with metal
    • E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
    • E21D11/20—Special cross- sections, e.g. corrugated

Definitions

  • the invention relates to a channel profile for interlocking, resilient pit expansion with reinforced, curved bottom and curved arched webs, which in outward-facing flanges, with an average flange thickness that 0.9 to 1.1 times and an average flange height that 1.25 to 1.50 times the thickness of the bottom, with the bottom flattened on the outside.
  • the ring-shaped or arch-shaped expansion frames are composed of flanged channel profiles with their ends inserted into each other in the same direction, which are so resiliently braced in the overlap area by connecting means that they move relative to each other when a certain mountain pressure is exceeded in the sense of a shortening of the arch length and thereby remove premature plastic deformation from the rock pressure.
  • DE-B-1 010 031 shows the so-called bell profile.
  • the base is arched and merges into a parabolic shape that becomes slimmer webs that end in outward-facing flanges.
  • An important criterion here is an additional reinforcement of the floor to the outside. Furthermore, the contact surface when the channel profiles slide into one another is provided between the webs.
  • DE-B-1 166 121 shows the so-called TH profile.
  • This prior art is based on the preamble of claim 1.
  • An essential feature of this profile is the flattened bottom, which also merges into laterally thinner webs, which in turn end in flanges facing outwards.
  • the sliding surface is arranged between the flanges when the profiles are moved against each other.
  • Both known profile shapes have the disadvantage that they do not achieve the optimum in terms of the ratio of the material weight used to the achievable load capacity.
  • Gutter profiles gap when deflected. This reduces the section modulus in the plastic area due to the reduced profile height. It is known that the TH profile is stiffer with less deflection and drops more in the subsequent later plastic area than the GP profile.
  • the TH profile deforms in the plastic area essentially in the floor area, the web area essentially maintaining its original shape.
  • the GP profile deforms essentially in the web area and the floor area remains almost undeformed, which means that the material is not optimally used in both profiles.
  • the load-bearing capacity of track extension profiles is determined in accordance with DIN 21 538. Thereafter, the bending moment, which causes a permanent deflection of 50 mm or 100 mm when the profile is bent with a support of 1000 mm, is used to classify the load-bearing capacity according to DIN 21 539.
  • the minimum web thickness on the flanges corresponds to 0.30 to 0.35 times the base thickness and the base is flattened on the outside with a width corresponding to the base thickness and the overall profile width is 0.9 to 1, Is 1 times the total profile height.
  • the gap between the outer wall of the inner profile and the inner wall of the outer profile widens continuously from an initial width at the flanges to the bottom in the overlap region of two channel profiles braced together.
  • the flange ends in a convex ellipse and is delimited on the side facing the webs by a concave ellipse of the same type.
  • the concave elliptical flange boundary is formed by a slightly larger ellipse and / or with an ellipse center point shifted slightly to the profile axis than the convex elliptical flange boundary.
  • One embodiment can also be designed such that the outer flange boundary is formed by two roof-shaped slopes that run slightly outwards.
  • the drawing shows a section through the overlap area of a pit extension frame, which is formed from the gutter profiles according to the invention, inner profile 1 and outer profile 2, each consisting of floor 3, webs 4 and flanges 5, the associated clamping connections not being shown for reasons of clarity.
  • the mean flange thickness 52 corresponds to 0.96 times, the flange height 51 to 1.33 times and the minimum web thickness 41 on the flange 5 to 0.35 times the base thickness 31.
  • the total width 23 of the inner profile 1 or of the outer profile 2 corresponds in each case to 1.06 times the total height 22 of the inner profile 1 or of the outer profile 2.
  • the gap 6 between the two braced profiles 1, 2 in the web area widens continuously from an initial width to the Flanges 5 to the bottom 3.
  • the flange 5 ends in a convex ellipse 53. On the side facing the webs 4, the flange 5 is delimited by a concave ellipse 54 of the same type.
  • the concave elliptical flange boundary is formed by a slightly larger ellipse with an ellipse center point shifted slightly to the profile axis 12 than is the case with the convex elliptical flange boundary.
  • the outer flange delimitation 55 is formed by two sloping roof-like slopes.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Architecture (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Lining And Supports For Tunnels (AREA)
  • Sewage (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)

Description

Die Erfindung betrifft ein Rinnenprofil für ineinander verschieblichen, nachgiebigen Grubenausbau mit verstärktem, gewölbten Boden und kurvenförmig gewölbten Stegen, die in nach außen gerichtete Flansche, mit einer mittleren Flanschdicke, die dem 0,9- bis 1,1fachen und einer mittleren Flanschhöhe, die dem 1,25 bis 1,50fachen der Bodendicke entspricht, auslaufen, wobei der Boden außen abgeflacht ist.The invention relates to a channel profile for interlocking, resilient pit expansion with reinforced, curved bottom and curved arched webs, which in outward-facing flanges, with an average flange thickness that 0.9 to 1.1 times and an average flange height that 1.25 to 1.50 times the thickness of the bottom, with the bottom flattened on the outside.

Derartige Rinnenprofile werden im Grubenausbau, insbesondere beim sogenannten Gleitbodenausbau in der Strecke eingesetzt. Die dabei ring- oder bogenförmig ausgebildeten Ausbaurahmen sind aus mit ihren Enden gleichsinnig ineinander gelegten geflanschten Rinnenprofilen zusammengesetzt, die im Überlappungsbereich durch Verbindungsmittel derart nachgiebig miteinander verspannt sind, daß sie sich beim Überschreiten eines bestimmten Gebirgsdrukkes im Sinne einer Verkürzung der Bogenlänge relativ gegeneinander verschieben und dadurch einen vorzeitigen plastischen Verformung durch den Gebirgsdruck entziehen.Such channel profiles are used in mine construction, especially in so-called sliding floor construction in the route. The ring-shaped or arch-shaped expansion frames are composed of flanged channel profiles with their ends inserted into each other in the same direction, which are so resiliently braced in the overlap area by connecting means that they move relative to each other when a certain mountain pressure is exceeded in the sense of a shortening of the arch length and thereby remove premature plastic deformation from the rock pressure.

Es sind zwei verschiedene Profilformen von Rinnenprofilen der eingangs genannten Gattung bekannt. Die DE-B-1 010 031 zeigt das sogenannte Glockenprofil. Bei diesem Profil ist der Boden gewölbt ausgebildet und geht im wesentlichen pärabelförmig in schlanker werdende Stege über, die in nach außen gerichtete Flansche auslaufen. Als wesentliches Kriterium ist hier eine zusächtliche Verstärkung des Bodens nach außen zu nennen.Weiterhin wesentlich ist die Berührungsfläche beim Gleiten der Rinnenprofile ineinander zwischen den Stegen vorgesehen.There are two different profile shapes of channel profiles of the type mentioned above. DE-B-1 010 031 shows the so-called bell profile. In this profile, the base is arched and merges into a parabolic shape that becomes slimmer webs that end in outward-facing flanges. An important criterion here is an additional reinforcement of the floor to the outside. Furthermore, the contact surface when the channel profiles slide into one another is provided between the webs.

Die DE-B-1 166 121 zeigt das sogenannte TH-Profil. Dieser Stand der Technik liegt dem Oberbegriff des Anspruchs 1 zugrunde. Wesentliches Merkmal dieses Profils ist der außen abgeflachte Boden, der ebenfalls in seitlich dünnere Stege übergeht, die wiederum in nach außen gerichtete Flanschen auslaufen. Bei den TH-Profilen ist die Gleitfläche beim Verschieben der Profile gegeneinander zwischen den Flanschen angeordnet. Beiden bekannten Profilformen haftet aber der Nachteil an, daß sie nicht das Optimum hinsichtlich des Verhältnisses von eingesetztem Materialgewicht zu erzielbarer Tragfähigkeit erzielen. Rinnenprofile klaffen bei Durchbiegung auf. Damit vermindert sich das Widerstandsmoment im plastischen Bereich aufgrund der verminderten Profilhöhe. Dabei ist bekannt, daß das TH-Profil bei geringerer Durchbiegung steifer ist und im weiteren späteren plastischen Bereich stärker abfällt als das GP-Profil. Das TH-Profil verformt sich im plastischen Bereich im wesentlichen im Bodenbereich, wobei der Stegbereich im wesentlichen seine Ursprungsform behält. Dagegen verformt sich das GP-Profil im wesentlichen im Stegbereich und der Bodenbereich bleibt nahezu unverformt, was eine nicht optimale Ausnutzung des Materials bei beiden Profilen bedeutet. Die Tragfähigkeit von Streckenausbauprofilen bestimmt sich nach DIN 21 538. Danach dient das Biegemoment, das beim Durchbiegen des Profils bei einer Abstützung von 1000 mm eine bleibende Durchbiegung von 50 mm bzw. 100 mm hervorruft, zum Einordnen in die Tragfähigkeitsstufe nach DIN 21 539.DE-B-1 166 121 shows the so-called TH profile. This prior art is based on the preamble of claim 1. An essential feature of this profile is the flattened bottom, which also merges into laterally thinner webs, which in turn end in flanges facing outwards. In the TH profiles, the sliding surface is arranged between the flanges when the profiles are moved against each other. Both known profile shapes, however, have the disadvantage that they do not achieve the optimum in terms of the ratio of the material weight used to the achievable load capacity. Gutter profiles gap when deflected. This reduces the section modulus in the plastic area due to the reduced profile height. It is known that the TH profile is stiffer with less deflection and drops more in the subsequent later plastic area than the GP profile. The TH profile deforms in the plastic area essentially in the floor area, the web area essentially maintaining its original shape. In contrast, the GP profile deforms essentially in the web area and the floor area remains almost undeformed, which means that the material is not optimally used in both profiles. The load-bearing capacity of track extension profiles is determined in accordance with DIN 21 538. Thereafter, the bending moment, which causes a permanent deflection of 50 mm or 100 mm when the profile is bent with a support of 1000 mm, is used to classify the load-bearing capacity according to DIN 21 539.

Von daher ist es Aufgabe der Erfindung, ein Rinnenprofil der eingangs genannten Art zu schaffen, das mit einem geringeren Querschnitt eine gleiche Tragfähigkeit nach DIN 21 538 wie die bekannten Rinnenprofile erzielt.It is therefore an object of the invention to provide a channel profile of the type mentioned at the outset which, with a smaller cross section, achieves the same load-bearing capacity according to DIN 21 538 as the known channel profiles.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die minimale Stegdicke an den Flanschen dem 0,30- bis 0,35fachen der Bodendicke entspricht und der Boden außen maximal mit einer Breite entsprechend der Bodendicke abgeflacht ist und die Gesamtprofilbreite das 0,9- bis 1, 1fache der Gesamtprofilhöhe beträgt.This object is achieved in that the minimum web thickness on the flanges corresponds to 0.30 to 0.35 times the base thickness and the base is flattened on the outside with a width corresponding to the base thickness and the overall profile width is 0.9 to 1, Is 1 times the total profile height.

Bei einer zweckmäßigen Ausführungsform ist vorgesehen, daß sich im Überlappungsbereich zweier miteinander verspannter Rinnenprofile der Spalt zwischen der äußeren Wandung des Innenprofils und der inneren Wandung des Außenprofils von einer Ausgangsbreite an den Flanschen stetig bis zum Boden erweitert.In an expedient embodiment it is provided that the gap between the outer wall of the inner profile and the inner wall of the outer profile widens continuously from an initial width at the flanges to the bottom in the overlap region of two channel profiles braced together.

Ferner ist es vorteilhaft, daß der Flansch in einer konvexen Ellipse ausläuft und an der den Stegen zugewandten Seite durch eine gleichartige konkave Ellipse begrenzt ist. Weiterhin ist es möglich, daß die konkave elliptische Flanschbegrenzung durch eine geringfügig größere Ellipse und/oder mit einem geringfügig zur Profilachse verschobenen Ellipsenmittelpunkt gebildet ist als die konvexe elliptische Flanschbegrenzung. Auch kann eine Ausführungsform so ausgebildet sein, daß die äußere Flanschbegrenzung durch zwei dachförmig leicht nach außen verlaufende Schrägen gebildet ist.It is also advantageous that the flange ends in a convex ellipse and is delimited on the side facing the webs by a concave ellipse of the same type. Furthermore, it is possible that the concave elliptical flange boundary is formed by a slightly larger ellipse and / or with an ellipse center point shifted slightly to the profile axis than the convex elliptical flange boundary. One embodiment can also be designed such that the outer flange boundary is formed by two roof-shaped slopes that run slightly outwards.

Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, daß für die gleichen Ausbaubedingungen unter Tage nunmehr leichtere Rinnenprofile für den Grubenausbau eingesetzt werden können oder bei gleichem Materialeinsatz eine höhere Tragfähigkeit erzielt wird. Dieses bedeutet für die Praxis eine Verringerung der Transport- und Ausbauarbeit. Weiterhin vorteilhaft hinsichtlich der plastischen Verformbarkeit des Rinnenprofils entsprechend den Prüfrichtlinien nach DIN 21 538 tritt beim erfindungsgemäßen Rinnenprofil nahezu in sämtlichen Bereichen des Profilquerschnitts ein gleichmäßiges Fließen auf, womit alle Bereiche des Rinnenprofils gleichmäßig zum Tragen kommen, wenn dieses sich im plastischen Bereich verformt.The advantages achieved by the invention are, in particular, that lighter channel profiles can now be used for pit expansion for the same conditions of underground installation or that a higher load-bearing capacity can be achieved with the same use of materials. In practice, this means a reduction in transport and expansion work. Furthermore advantageous with regard to the plastic deformability of the channel profile in accordance with the test guidelines according to DIN 21 538, with the channel profile according to the invention, a uniform flow occurs in almost all areas of the profile cross section, with which all areas of the channel profile come into play evenly when it deforms in the plastic area.

Ferner ist vorteilhaft bei der im Anspruch 2 gekennzeichneten Ausführungsform, daß die Gleitfläche zwischen den Profilen unter Berücksichtigung sämtlicher Fertigungstoleranzen eindeutig und immer zwischen den Flanschen liegt. Dadurch ist auch eine eindeutige Verspannung gegeben. Die Ausgestaltungen nach den Ansprüchen 3 bis 5 zeigen weitere Möglichkeiten geringfügiger Tragfähigkeitserhöhungen auf.It is also advantageous in the embodiment characterized in claim 2 that the sliding surface between the profiles, taking into account all manufacturing tolerances, lies clearly and always between the flanges. This also gives a clear bracing. The configurations according to claims 3 to 5 show further possibilities for slight increases in load capacity.

In der Zeichnung ist die Erfindung anhand ei nes Ausführungsbeispiels näher erläutert.In the drawing, the invention is explained in more detail using egg nes embodiment.

Die Zeichnung zeigt einen Schnitt durch den Überlappungsbereich eines Grubenausbaurahmens, der aus den erfindungsgemäßen Rinnenprofilen, Innenprofil 1 und Außenprofil 2, die jeweils aus Boden 3, Stegen 4 und Flanschen 5 bestehen, gebildet ist, wobei die zugehörigen Spannverbindungen der Übersichtlichkeit wegen nicht dargestellt sind.The drawing shows a section through the overlap area of a pit extension frame, which is formed from the gutter profiles according to the invention, inner profile 1 and outer profile 2, each consisting of floor 3, webs 4 and flanges 5, the associated clamping connections not being shown for reasons of clarity.

Bei dem Innenprofil 1 und dem Außenprofil 2 entsprechen jeweils die mittlere Flanschdicke 52 dem 0, 96fachen, die Flanschhöhe 51 dem 1,33fachen und die minimale Stegdicke 41 am Flansch 5 dem 0,35fachen der Bodendicke 31.In the case of the inner profile 1 and the outer profile 2, the mean flange thickness 52 corresponds to 0.96 times, the flange height 51 to 1.33 times and the minimum web thickness 41 on the flange 5 to 0.35 times the base thickness 31.

Der innen voll ausgerundete Boden 3 ist außen über eine Breite 32 vom 0,42fachen der Bodendicke 31 abgeflacht. Die Gesamtbreite 23 des Innenprofils 1 bzw. des Außenprofils 2 entspricht jeweils der 1,06fachen Gesamthöhe 22 des Innenprofils 1 bzw. des Außenprofils 2. Der Spalt 6 zwischen den zwei miteinander verspannten Profilen 1, 2 im Stegbereich erweitert sich stetig von einer Anfangsbreite an den Flanschen 5 zum Boden 3 hin. Der Flansch 5 läuft in einer konvexen Ellipse 53 aus. An der den Stegen 4 zugewandten Seite wird der Flansch 5 durch eine gleichartige konkave Ellipse 54 begrenzt. Dabei ist die konkave elliptische Flanschbegrenzung durch eine geringfügig größere Ellipse mit einem geringfügig zur Profilachse 12 verschobenen Ellipsenmittelpunkt gebildet als dieses bei der konvexen elliptischen Flanschbegrenzung der Fall ist. Die äußere Flanschbegrenzung 55 ist durch zwei dachförmig leicht nach außen verlaufende Schrägen gebildet.The base 3, which is fully rounded on the inside, is flattened on the outside over a width 32 of 0.42 times the base thickness 31. The total width 23 of the inner profile 1 or of the outer profile 2 corresponds in each case to 1.06 times the total height 22 of the inner profile 1 or of the outer profile 2. The gap 6 between the two braced profiles 1, 2 in the web area widens continuously from an initial width to the Flanges 5 to the bottom 3. The flange 5 ends in a convex ellipse 53. On the side facing the webs 4, the flange 5 is delimited by a concave ellipse 54 of the same type. The concave elliptical flange boundary is formed by a slightly larger ellipse with an ellipse center point shifted slightly to the profile axis 12 than is the case with the convex elliptical flange boundary. The outer flange delimitation 55 is formed by two sloping roof-like slopes.

Claims (5)

1. Channel profile member for relatively-displaceable yieldable mine arch supports, with a strengthened base (3) and curved side webs (4), which run into outwardly-directed flanges (5) having a central thickness (52) which corresponds to 0.9 to 1.1 times the base thickness (31) and a central height (51) which corresponds to 1.25 to 1.50 times the base thickness (31), the base (3) being flattened externally, characterized in that the minimum web thickness (41) at the flanges (5) corresponds to 0.30 to 0,35 times the base thickness (31) and the base (3) is flattened externally to have, at a maximum, a width (32) corresponding to the base thickness (31) and the full width (23) of the profile member amounts to 0.9 to 1.1 times the full profile height (22).
2. Channel profile member according to claim 1, characterized in that, in the overlap region of two mutually-stressed profile members, a gap (6) between the outer wall of the miner profile member (1) and the inner wall of the outer profile member (2) widens progressively from an initial width at the flanges (5) to the base (3).
3. Channel profile member according to claims 1 and 2, characterized in that each flange (5) runs into a convex ellipse (53) and is bounded on the side adjacent the webs (4) by a similar concave ellipse (54).
4. Channel profile member according to claim 3, characterized in that the concave elliptical flange boundary is formed by a slightly larger ellipse and/or with an ellipse mid-point located slightly nearer the axis of the profile member than the convex elliptical flange boundary.
5. Channel profile member according to claims 1 to 4, characterized in that the outer flange boundary (55) is formed by two roof-like slightly outwardly-directed sloping surfaces.
EP80107969A 1980-03-22 1980-12-17 Trough sections for mine supports Expired EP0036449B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3011119 1980-03-22
DE3011119A DE3011119C2 (en) 1980-03-22 1980-03-22 Channel profile for pit lining

Publications (2)

Publication Number Publication Date
EP0036449A1 EP0036449A1 (en) 1981-09-30
EP0036449B1 true EP0036449B1 (en) 1984-12-12

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ID=6098013

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80107969A Expired EP0036449B1 (en) 1980-03-22 1980-12-17 Trough sections for mine supports

Country Status (7)

Country Link
EP (1) EP0036449B1 (en)
JP (1) JPS56143000A (en)
DE (1) DE3011119C2 (en)
ES (1) ES265207Y (en)
PL (1) PL229417A1 (en)
YU (1) YU41758B (en)
ZA (1) ZA811852B (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR63275E (en) * 1952-09-03 1955-09-12 Bochumer Eisen Heintzmann Annular or curved beam for mine galleries
DE960532C (en) * 1948-09-13 1957-03-21 Bochumer Eisen Heintzmann Set of flanged gutter profiles, preferably for ring or arched extension
DE1010031B (en) * 1955-11-08 1957-06-13 Bergbaustahl G M B H Extension frame for mining operations, tunnels or the like.
DE975869C (en) * 1948-08-24 1962-11-08 Bochumer Eisen Heintzmann Ring or arched route extension
DE1166121B (en) * 1958-09-20 1964-03-26 Bochumer Eisen Heintzmann Flanged gutter profile, especially for pit lining
DE2538697A1 (en) * 1975-08-30 1977-03-10 Eisenhuette Prinz Rudolph Ag Mine roadway yielding support frame - has cutting action members between surfaces of clamped sections

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1206829B (en) * 1965-12-16
DE1009133B (en) * 1951-03-28 1957-05-29 Bochumer Eisen Heintzmann Set of lining iron-like pit support profiles, preferably for sliding arch support in mine sections
DE1170352B (en) * 1958-02-10 1964-05-21 Forges Et Ateliers De La Nave Trough-shaped profile, especially for track expansion frames
DE1859206U (en) * 1959-03-04 1962-10-04 Thyssen Huette Ag EXPANSION PROFILE.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE975869C (en) * 1948-08-24 1962-11-08 Bochumer Eisen Heintzmann Ring or arched route extension
DE960532C (en) * 1948-09-13 1957-03-21 Bochumer Eisen Heintzmann Set of flanged gutter profiles, preferably for ring or arched extension
FR63275E (en) * 1952-09-03 1955-09-12 Bochumer Eisen Heintzmann Annular or curved beam for mine galleries
DE1010031B (en) * 1955-11-08 1957-06-13 Bergbaustahl G M B H Extension frame for mining operations, tunnels or the like.
DE1166121B (en) * 1958-09-20 1964-03-26 Bochumer Eisen Heintzmann Flanged gutter profile, especially for pit lining
DE2538697A1 (en) * 1975-08-30 1977-03-10 Eisenhuette Prinz Rudolph Ag Mine roadway yielding support frame - has cutting action members between surfaces of clamped sections

Also Published As

Publication number Publication date
YU12581A (en) 1983-10-31
DE3011119A1 (en) 1981-10-01
EP0036449A1 (en) 1981-09-30
JPS56143000A (en) 1981-11-07
PL229417A1 (en) 1981-10-02
YU41758B (en) 1987-12-31
ES265207Y (en) 1983-06-16
ES265207U (en) 1982-12-01
ZA811852B (en) 1982-04-28
DE3011119C2 (en) 1985-02-21

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