US3283514A - Sliding bearer-sets for mine galleries - Google Patents

Sliding bearer-sets for mine galleries Download PDF

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Publication number
US3283514A
US3283514A US312025A US31202563A US3283514A US 3283514 A US3283514 A US 3283514A US 312025 A US312025 A US 312025A US 31202563 A US31202563 A US 31202563A US 3283514 A US3283514 A US 3283514A
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US
United States
Prior art keywords
uprights
head
piece
upper terminal
bearer
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Expired - Lifetime
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US312025A
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English (en)
Inventor
Launay Jean Joseph
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APPLIC SCIENT TECH IND ET COMM
Applications Scientifiques Techniques Industrielles Et Commerciales Astic
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APPLIC SCIENT TECH IND ET COMM
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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

Definitions

  • the present invention relates to sliding bearer-sets for mine galleries, said bearer-sets being made up preferably of channel sections which fit one inside the other, and is more especially concerned with sets which are made up of a head-piece (socket section) and two uprights (inserted sections) which are joined together in each overlapping zone by a top assembly and bottom assembly and permit of sliding movement under the action of increasing stresses exerted by the ground, at least one of said assemblies being adapted in accordance with present design requirements to be rigidly fixed in sliding motion to one of the elements of the set.
  • the overlapping portion the length of which is initially in the vicinity of 40 cm., progressively increases until the extremity of each upright reaches substantially the summit of the head-piece when in the end position which corresponds to the maximum roof-subsidence, and the primary object of the invention is to permit such subsidence without producing any deformation of the constituent elements.
  • said structural members accordingly take up positions in which the deformations to which the sets are subjected are of minimum value, that is to say, of course, insofar as friction forces and ground obstacles permit.
  • each assembly remains integral with one of the elements of the set, these latter are necessarily subjected to deformation and it is difficult to determine whether such deformation is either elastic or permanent. Permanent deformation is not admissable, whereas elastic deformation must reach a value such that the set is locked in position and any sliding movement thus becomes impossible.
  • the object of the present invention is therefore to provide a support frame or so-called bearer-set which is formed in known manner by a head-piece and two uprights wherein said head-piece comprises two arms having a radius of curvature which is identical to the radius of curvature of the respective upper terminal portion of each of the two uprights and the adjoining extremities of the said arms make the same angle with each other as the angle defined by imaginary tangential lines drawn to the two closest points on each terminal portion in the position of maximum subsidence which is contemplated.
  • the head-piece when the maximum subsidence which is contemplated coincides with the position in which the extremities of the uprights are in contact, the head-piece then takes the shape of a perfect Gothic arch or pointed arch, whereas in the case in which the maximum subsidence contemplated does not reach the point of contact ture of the two arms do not coincide.
  • the two arcuate arms of the head-piece are rigidly coupled together by a central arm.
  • the head-piece is constructed in such a manner that the origins of the radius of curva- In other words, the two arms of the head-piece do not lie on a single imaginary circle.
  • FIG. 1 represents the two end positions which are successively taken up by the elements of a conventional bearer-set, the head-piece of which has a radius of curvature which is shorter than that of the uprights.
  • FIG. 2 is a similar View of a form of embodiment of a bearer-set in accordance with the invention in the two end positions thereof, the position of maximum subsidence being coincident with the point of contact of the ends of the uprights.
  • FIG. 3 is a similar view of a second form of embodiment in which the extremities of the two uprights do not come into contact in the position of maximum subsidence.
  • P designates each of the uprights of a bearer-set of the usual type and C designates the associated head-piece having a radius of curvature which is shorter than that of the uprights.
  • the solid outline which has a wider development shows the initial position of the elements of the set wherein the overlapping portion AB of the head-piece and of the upright has a length of the order of 40 cm.
  • the broken outline represents the end position which is taken up by the elements of the set to which there has in this case been assigned the index 1, after a sliding movement has been carried out under the action of stresses exerted by the ground (or roof).
  • the head-piece CO takes the shape of a Gothic or pointed arch (as shown in FIG. 2), the two halves of which, as constituted by sections of circular configuration and having the same curvature as the upper terminal portion of the uprights, make an angle a with each other at the central point M of the head-piece, said angle a being equal to the angle made by the two extremities A of the uprights when these latter meet at A1 in the end positions thereof.
  • this shape can very easily be obtained by press-work using a head-piece of conventional configuration, without subjecting the metal to any excessive stresses and without resulting in any appreciable increase in the cost price.
  • the head-piece CO is com posed of two arms DB having the same radius of curvature as the uprights and joined together by a central arm DD of any suitable shape.
  • the two arms are disposed with respect to one another as to form a pointed arch except that in this embodiment the arch is unfinished and the truncated extremities are joined by means of the arm DD.
  • the angle between two imaginary lines drawn tangentially to the adjacent end points on each arched arm is less than 180".
  • the two points practically coincide at M, while in FIG. 3 the two points are spaced and are disposed at DD.
  • the aforenoted angle is equal to an angle formed by two 4% imaginary lines drawn tangentially to the adjacent end points on each terminal portion when the head-piece is in its lowest position.
  • the last-named two points practically coincide at A, while in FIG. 3 the two points are spaced and disposed at A
  • a What I claim is:
  • a bearer set for mine galleries comprising, two uprights of substantially the same configuration secured at their lower end to spaced points adjacent or on the ground and swingable thereabout, said uprights being symmetrically disposed about an axis normal to the ground, each upright including a curved upper terminal portion, a headpiece including a pair of members rigidly secured to one another in an end-to-end and symmetrical relationship, each of said members including an arched arm slidably secured to said terminal portion of said uprights and adapted to overlap therewith, said head-piece adapted to move in a substantially linear, vertical path between a highest position and a lowest position as said uprights swing towards each other, said upper terminal portions having a radius of curvature identical to that of said arched arms adapted to overlap with said upper terminal portions, the origins of the radius of curvature of said arched arms being spaced from one another, the angle between two imaginary lines drawn tangentially to adjacent end points on each said arched arm being less than and being equal to the angle formed by two imaginary lines drawn tangentially

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
US312025A 1962-09-29 1963-09-27 Sliding bearer-sets for mine galleries Expired - Lifetime US3283514A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR910815A FR1352831A (fr) 1962-09-29 1962-09-29 Perfectionnements aux cadres de soutènement coulissants pour galeries de mines

Publications (1)

Publication Number Publication Date
US3283514A true US3283514A (en) 1966-11-08

Family

ID=8787737

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US312025A Expired - Lifetime US3283514A (en) 1962-09-29 1963-09-27 Sliding bearer-sets for mine galleries

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US (1) US3283514A (de)
AT (1) AT262195B (de)
FR (1) FR1352831A (de)
GB (1) GB1021296A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3395542A (en) * 1965-03-04 1968-08-06 Forges Et Ateliers De La Nave Propping frame for mining galleries

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1212924B (de) * 1965-03-04 1966-03-24 Forges Et Ateliers De La Nave Ausbaurahmen fuer Grubenstrecken

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2713774A (en) * 1948-08-24 1955-07-26 Bochumer Eisen Heintzmann Supporting frame, especially mine supports
GB765377A (en) * 1953-12-16 1957-01-09 Stamicarbon Improvements in or relating to mine gallery supporting structures

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2713774A (en) * 1948-08-24 1955-07-26 Bochumer Eisen Heintzmann Supporting frame, especially mine supports
GB765377A (en) * 1953-12-16 1957-01-09 Stamicarbon Improvements in or relating to mine gallery supporting structures

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3395542A (en) * 1965-03-04 1968-08-06 Forges Et Ateliers De La Nave Propping frame for mining galleries

Also Published As

Publication number Publication date
FR1352831A (fr) 1964-02-21
AT262195B (de) 1968-06-10
GB1021296A (en) 1966-03-02

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