US3745772A - Hydraulic roof support frame - Google Patents

Hydraulic roof support frame Download PDF

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Publication number
US3745772A
US3745772A US00206794A US3745772DA US3745772A US 3745772 A US3745772 A US 3745772A US 00206794 A US00206794 A US 00206794A US 3745772D A US3745772D A US 3745772DA US 3745772 A US3745772 A US 3745772A
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US
United States
Prior art keywords
roof
beams
sections
hydraulic
floor
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
US00206794A
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English (en)
Inventor
J Welzel
H Bull
A Maykemper
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.)
Hemscheidt Hermann Maschinenfabrik GmbH and Co
Original Assignee
Hemscheidt Hermann Maschinenfabrik GmbH and Co
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
Priority claimed from DE19702063466 external-priority patent/DE2063466C3/de
Application filed by Hemscheidt Hermann Maschinenfabrik GmbH and Co filed Critical Hemscheidt Hermann Maschinenfabrik GmbH and Co
Application granted granted Critical
Publication of US3745772A publication Critical patent/US3745772A/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
    • 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

Definitions

  • ABSTRACT An hydraulic roof-support frame comprising floor and roof beams each of articulated construction, two outer hydraulic props extending between outer sections of the beams, at or near the ends of the latter, and at least one intermediate hydraulic prop, of greater strength than the outer props, extending between central portions of the beams, the said central portions having roof-engaging and floor-engaging surfaces of substantially greater area than the corresponding surfaces on the outer sections of the beams.
  • the beam does not support the load fully until the roof has sunk under that pressure, as the props and the beam are not braced so as to provide active support but are merely wedged against the side-walls and roof of the gallery or road.
  • the roof-support is bulky and is relatively expensive to install, so that if the cutting machinery advances rapidly, the roof-support is left behind or delays the advance. Also, after a roofsupport has been fitted in position, it is uneconomic to remove it for reuse because of the high cost of'transporting and erecting its component parts which have, in any case, usually become considerably deformed.
  • roof-support does not adequately support the central part of the roof where the greatest bending stress occurs.
  • the resulting flaking and fissuring of the mineral or rock surrounding the road or gallery reduces the stability of the latter particularly if the additional pressure caused by the mining work in progress loosens stones and rocks so that they fall into the road.
  • This and the associated floor creep which also frequently occurs cannot be prevented by using intermediate props, especially if the solid rock surrounding the road or gallery has already developed fissures or has begun to flake. Consequently, a considerable amount of extra work is required, quite apart from extra props, in order to strengthen the roof-supports in the road or gallery and to maintain the latter at the desired width and height.
  • the aim of the present invention is to provide a roof-support which is immediately operative, which can easily be installed and re-used, and which reduces or largely prevents flaking and flssuring of the rock surrounding a road or gallery where the roof-support is installed.
  • the invention is accordingly directed to an hydraulic roof-support frame comprising floor and roof beams.
  • each of articulated construction two outer hydraulic props extending between outer sections of the beams,
  • this new form of roof-support frame is that the roof of the road or gallery is now actively supported over its central portion, the main bearing force being transmitted to the intermediate prop or props, while the end props have the subordinate functionof providing additional support for the roof adjacent the side walls of the road or gallery.
  • the main bearing force on the intermediate prop or props is applied to the floor and roof of the road or gallery by central portions of the roof and floor beams which are rigid and of large area, thus largely preventing the rock surrounding the road or gallery from yielding and breaking.
  • any breaking-up or creep of the floor caused by settlement or by the additional pressure of mine-working in progress is also actively counteracted by the intermediate prop or props (which can bear a load considerably exceeding the load due to settlement) and by the large-area central portion of the floor beam. If the road or gallery is unusually wide, two or more intermediate props can be used to take the main 7 bearing force.
  • the frame can easily be taken down and re-used, particularly as deformation of the components does not occur to an appreciable extent.
  • FIG. 1 is a side view of the roof-support frame;
  • FIG. 2 is a section taken on the line II II in FIG.
  • FIG. 3 is a view similar to-FIG. 2 showing the manner in which the sections of the roof beam are locked together;
  • FIG. 4 is a section taken on the line IV IV in FIG. 1.
  • the roof-support frame shown in the drawings comprises a centrally-disposed, telescopic, hydraulic intermediate prop l forming the main bearing element of the support frame, the prop 1 being provided with partspherical top and bottom bearing surfaces 2, 3 releasably engaging in corresponding recesses 4, 5 formed in the central sections 6, 7 of roof and floor beams 8, 9.
  • the beams 8 and 9 are therefore of articulated construction, it being appreciated that the three sections of each beam can be pivotally connected together in a different manner if so desired.
  • the end sections 12 and 13 of the roof and floor beams are of identical construction so that they can be interchanged if that is required.
  • outer, telescopic, hydraulic props 14 and 15 Arranged at or near the ends of the beams 8 and 9 are two outer, telescopic, hydraulic props 14 and 15 which are of smaller diameter than the intermediate prop 1.
  • the outer props 14 and 15 each have part-spherical top and bottom bearing surfaces 16 and 17 releasably engaging in recesses 18 and 19 in the end sections 12 and 13 of the beams 8 and 9, the recesses 18 and 19 being smaller than the recesses 4 and for the prop 1.
  • each beam 8 and 9 can be locked together in pairs so as to form rigid units by 'means of locking shoes 20 which can slide along slideways 21 and 22 on the beam sections so as to prevent pivoting movement between the sections. This is illustrated in FIG. 3 and also on the floor beam 9 in FIG. 1. Other locking elements instead of the shoes 20 could be used for the same purpose.
  • the roof-support frame shown in the drawings takes the main load of the roof on the centrally-disposed prop l which is stronger than the outer props 14 and 15.
  • the beams 8 and 9 are both of articulated construction while, at the same time, having locking means for locking together adjacent sections of each beam to form a rigid structure.
  • An hydraulic roof-support frame comprising a floor beam and a roof beam, each of said beams being composed of a central section and two outer sections articulated thereto, two outer hydraulic props extending between the respective outer sections of the roof beam and the floor beam at locations adjacent the ends of the beams, at least one intermediate hydraulic prop, of greater load-bearing capacity than either of the said outer props, extending between the said central sections of the beams, roof-engaging and floor-engaging surfaces on the central and outer sections of the roof beam and floor beam respectively, the roof-engaging and floor-engaging surfaces on the central sections of the roof and floor beams each being of substantially greater area than the individual roof-engaging and floor-engaging surfaces on the outer sections of the beams, guide-ways on the beam sections extending longitudinally thereof, and locking shoes slidingly mounted on the said guide-ways, each of said locking shoes being movable from an inoperative position in which the shoe is located on one beam section only into a locking position where the shoe straddles two adjacent beam sections and thus locks the said adjacent beam

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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)
  • Bridges Or Land Bridges (AREA)
  • Door And Window Frames Mounted To Openings (AREA)
  • Tents Or Canopies (AREA)
  • Lining And Supports For Tunnels (AREA)
  • Revetment (AREA)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
US00206794A 1970-12-23 1971-12-10 Hydraulic roof support frame Expired - Lifetime US3745772A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702063466 DE2063466C3 (de) 1970-12-23 Hydraulischer Türstockgelenkausbau

Publications (1)

Publication Number Publication Date
US3745772A true US3745772A (en) 1973-07-17

Family

ID=5792006

Family Applications (1)

Application Number Title Priority Date Filing Date
US00206794A Expired - Lifetime US3745772A (en) 1970-12-23 1971-12-10 Hydraulic roof support frame

Country Status (6)

Country Link
US (1) US3745772A (enrdf_load_stackoverflow)
JP (1) JPS5136686B1 (enrdf_load_stackoverflow)
FR (1) FR2119373A5 (enrdf_load_stackoverflow)
GB (1) GB1312386A (enrdf_load_stackoverflow)
PL (1) PL77190B1 (enrdf_load_stackoverflow)
ZA (1) ZA718168B (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4492495A (en) * 1982-07-09 1985-01-08 Dowty Mining Equipment Limited Roof support for use in mines
US5269809A (en) * 1990-07-02 1993-12-14 American Cyanamid Company Locking mechanism for use with a slotted suture anchor
US5538364A (en) * 1995-02-14 1996-07-23 Huntsman; Steven D. Yieldable mine post having a double ball and socket configuration
CN118548076A (zh) * 2024-07-29 2024-08-27 广东省建筑设计研究院集团股份有限公司 一种转换支撑框架

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3123970A1 (de) * 1981-06-19 1983-01-05 Röhm GmbH, 6100 Darmstadt "verfahren zur herstellung von methacrylamiden"
CN113815409B (zh) * 2020-06-16 2025-07-11 中兴通讯股份有限公司 辅助驾驶方法、装置、车载系统及存储介质

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4492495A (en) * 1982-07-09 1985-01-08 Dowty Mining Equipment Limited Roof support for use in mines
US5269809A (en) * 1990-07-02 1993-12-14 American Cyanamid Company Locking mechanism for use with a slotted suture anchor
US5538364A (en) * 1995-02-14 1996-07-23 Huntsman; Steven D. Yieldable mine post having a double ball and socket configuration
CN118548076A (zh) * 2024-07-29 2024-08-27 广东省建筑设计研究院集团股份有限公司 一种转换支撑框架

Also Published As

Publication number Publication date
GB1312386A (en) 1973-04-04
DE2063466B2 (de) 1977-01-27
PL77190B1 (enrdf_load_stackoverflow) 1975-04-30
FR2119373A5 (enrdf_load_stackoverflow) 1972-08-04
DE2063466A1 (de) 1972-07-06
ZA718168B (en) 1973-08-29
JPS5136686B1 (enrdf_load_stackoverflow) 1976-10-09

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