US3874178A - Support for mine roofs and the like - Google Patents

Support for mine roofs and the like Download PDF

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Publication number
US3874178A
US3874178A US399504A US39950473A US3874178A US 3874178 A US3874178 A US 3874178A US 399504 A US399504 A US 399504A US 39950473 A US39950473 A US 39950473A US 3874178 A US3874178 A US 3874178A
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US
United States
Prior art keywords
support
axis
base
shield
axes
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
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US399504A
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English (en)
Inventor
Heinz Kunzer
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.)
Bochumer Eisenhuette Heintzmann GmbH and Co KG
Original Assignee
Bochumer Eisenhuette Heintzmann GmbH and Co KG
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK 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
    • E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
    • E21D23/0454—Trailing plates; Coal face or goaf side sprags
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK 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
    • E21D23/0004—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor along the working face
    • E21D23/0034—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor along the working face comprising a goaf shield articulated to a base member
    • E21D23/0039—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor along the working face comprising a goaf shield articulated to a base member and supported by a strut or by a row of struts parallel to the working face
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK 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
    • E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
    • E21D23/0427—Shield operating devices; Hinges therefor

Definitions

  • ABSTRACT A base has a side which is to face the mine face and another side which is to be remote therefrom.
  • An upwardly inclined shield is connected at one edge region to the other side of the base for pivotal movement about a first axis.
  • a roof member is connected to the opposite edge region of the shield, also pivotable but about a second axis.
  • a fluid-operated cylinder and piston unit is connected articulately at its opposite ends to the base and to the shield, respectively, so that the shield can turn about a third axis.
  • a rigid element is provided which can be selectively connected to the l l References Cited shield and to the base at the third and first axis, re-
  • a support for mine roofs or the like which comprises a base having a first side adapted to be closer towards and a second side farther from la mine face.
  • An upwardly inclined shield is provided, having one edge region articulated to the base at the aforementioned second side for pivotal movement about a first axis, and a spaced opposite free edge region for movement about a second axis.
  • a fluidoperated cylinder-and-piston unit has one end articulated to the base intermediate the sides thereof, and another end articulated to the shield intermediate the edge regions of the same for pivotal movement about a third axis.
  • Means is provided for varying the distance between the first and second axes, while maintaining unchanged the distance between the second and third axes.
  • I utilize as the means for varying the aforementioned distance a rigid element which can be connected with the base and the shield for pivotal movement about the first and third axes, respectively, thus making it possible for the point at which the force of the cylinder and piston unit (or units) acts upon the roof of the excavation via the shield, to be changed and to thereby increase the force acting upon the roof and supporting the same.
  • variations of this force can be selected by merely selecting a rigid element of the desired size, so that the only component which need be exchanged is the rigid element itself.
  • this change can be carried out rapidly, because the rigid elements can be readily exchanged one for another, so that the apparatus can be very quickly adapted to changing conditions.
  • FIG. 1 is a vertical section through an excavation, showing one embodiment of the apparatus in a side view, located in the excavation;
  • FIG. 2 is a view similar to FIG. 1, showing the apparatus of FIG. 1 modified in accordance with another feature of the present invention
  • FIG. 3 is a view similar to FIG. 2, illustrating the apparatus in a further modified embodiment.
  • FIG. 4 is a view similar to FIG. 3, illustrating the apparatus of FIG. 3 in another modified embodiment.
  • the support apparatus illustrated herein is designated in toto with reference numeral 1.
  • the cylinder and piston unit may, but need not be, a hydraulically operated unit. It can also be a mechanical unit.
  • the excavation is shown as a mine gallery, but of course could be any other type of excavation.
  • the part which is the mine face or the equivalent thereof, is designated with reference numeral 6, the floor with reference numeral 7, and the overhanging roof which is to be supported is designated with reference numeral 8.
  • Each of the apparatuses 1 has a moving unit 9 which may utilize a hydraulically operated cylinder and piston unit, by means of which the apparatus 1 is connected to a conveyor or the like, which is designated with reference numeral 10 and which extends along the face 6.
  • the conveyor serves to carry away material which has been removed from the mine face 6.
  • appropriate tools will be utilized for such removal but have not been illustrated because they are not necessary for an understanding of the invention.
  • the unit 9 can be used to shift the apparatuses l 6, if and when necessary.
  • Base 2 is provided at a side thereof which is remote from the face 6 with upwardly extending portion 1 I, to which shield 3 is articulated at 12 for movement about a horizontal pivot axis.
  • the free end 13 of the shield 3 has the roof member 4 articulated to it, again for movement about a horizontal pivot axis 14.
  • the cylinder and piston unit 5 which advantageously is hydraulically operated, has an upper portion which engages the shield 3 approximately midwayd intermediate the forward and rearward edges thereof. Its lower portion is connected to the base 2 at 17 and its upper portion 15 is pivoted to the shield 3, but forwardly of (to the left of in FIG. 1) the location 17.
  • the unit 5 is slightly forwardly inclined towards the face 6 and this inclination assures that sufficient space is available for move ment of tools and the like, and that an adequate flow of air can be maintained along the mine face even if the distance between the roof 8 and the floor 7 is relatively small.
  • the arrangement of the apparatus is such that a sufficient supporting force for the roof 8 is transmitted to the same, via the roof member 4 and via the articulation 14, by the unit or units 5.
  • This apparatus is capable of being accommodated within a certain range to different roof heights, that is to different heights of the roof 8 which must be supported. If the height of the roof is beyond the upper limit of this range, however, the forward edge 19 of the roof member 4 would move too far away from the face 6, due to the arcuate movement of the articulation 14 about the articulation l2, and would not longer provide for sufficient support for the roof.
  • FIG. 2 a rigid element which is shown in FIG. 2, and which is connected rigidly but releasably with the shield 3.
  • the length of the element 20, that is its dimension between the left and right-hand side of FIG. 1, is selected in dependence upon the height and weight of the roof 8 which must be supported.
  • the utilization of the element 20, and its articulation at 12 to the base assures that the roof member 4 will move vertically within a certain range without being capable of receding from the face 6 too far.
  • the essential point is that the distance between the point 21 where the portion 15 of the unit 5 engages the shield 3, and the articulation 12 is increased with respect to the same distance in FIG. 1, when the element 20 is utilized.
  • the element 20 may be of one piece or it may be so constructed that its length can be varied. It could, for instance, be of telescopable components which can be telescoped together or pulled apart and arrested in respective positions, when it is desired to change its length. In that case, one element20 could be utilized for many different applications.
  • the element 20 may be along the face provided on at least a substantial part of its length with deflectors 22 which prevent material of the soil in the region 16 from falling down between the base and the shield and onto the conveyor or even the path I8.
  • the element 20 itself can be of shield-like nature or the components 22 can be of such nature, acting as shields or baffles.
  • the element 20 in its region facing the face 6 with a nose-like extension, having one or more bearing supports for the unit or units 5. Such bearing supports would then be located below the shield 3, and extend coaxially to the longitudinal axis of the respective unit 5. This ensures that a vertical displacement of the upper portion of the unit 5 makes it possible to use the same unit which is capable of supporting lower roof weights also for supporting greater roof weights, without having to change the lever arm relationships involved between the shield 3 and the element 20.
  • a rockable element 23 is provided which is pivotably mounted on the portion 11 of the base 2.
  • the element 23 has an articulate connection 24 on its side facing towards the soil 16, where the element 20 may be connected with it. It is further provided with a plurality of openings 26, located on an arcuate line surrounding the axis 25. These cooperate with similar openings 27 in the part 11 of the base 2, with respective ones of which they can be made to register. Bolts or similar elements (not illustrated) can be extended through the respective registering apertures 26, 27 to arrest the element 23 in a selected position.
  • the articulate connection 24 will move in a curved path in which it can move closer to and farther away from the face 6. This assures that independently of the distance between the roof 8 and the floor 7, the front edge of the roof member 4 will always be located closely adjacent to the face 6 and the roof is properly supported.
  • FIG. 3, as well as FIG. 4, also show that when the element 23 is ppivoted in the manner outlined earlier, the articulate connection 24 will perform a movement in the aforementioned curved path in direction both towards the face 6 and the roof 8. This assures the constant close proximity of the leading edge 19 of the roof member 4 to the face 6. In this manner it is possible to properly support the roof 8 at all times, even when it has just been freshly undercut by removal of material from the face 6.
  • portion 11 of the base 2 with several vertically spaced pivots 25 so that a furtheradjustment is provided, making it possible to connect the element 23 with the portion 11 at different vertical levels and to compensate for variations in the distance between the floor 7 and the roof 8.
  • a support for mine roofs and the like comprising a base having a first side adapted to be closer toward and a second side farther from a mine face; an upwardly inclined shield having an edge region articulated to said base at said second side for pivotal movement about a first axis, and a spaced opposite free edge region; a roof member connected to said free edge region for movement about a second axis; a cylinder-andpiston unit having one end articulated to said base intermediate said sides, and an other end articulated to said shield intermediate said edge regions for pivotal movement about a third axis; means comprising a rigid element for varying the distance between said first and third axes, while maintaining unchanged the distance between said second and third axes; and means releasably connecting said element with said edge region of said shield so that said varying means may be used whenever required but can be removed when not needed.

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)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Lining And Supports For Tunnels (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Pivots And Pivotal Connections (AREA)
  • Tents Or Canopies (AREA)
US399504A 1972-09-22 1973-09-21 Support for mine roofs and the like Expired - Lifetime US3874178A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2246745A DE2246745C2 (de) 1972-09-22 1972-09-22 Rückbare Schildausbaueinheit

Publications (1)

Publication Number Publication Date
US3874178A true US3874178A (en) 1975-04-01

Family

ID=5857174

Family Applications (1)

Application Number Title Priority Date Filing Date
US399504A Expired - Lifetime US3874178A (en) 1972-09-22 1973-09-21 Support for mine roofs and the like

Country Status (6)

Country Link
US (1) US3874178A (enrdf_load_stackoverflow)
BE (1) BE804720A (enrdf_load_stackoverflow)
DE (1) DE2246745C2 (enrdf_load_stackoverflow)
FR (1) FR2200436B3 (enrdf_load_stackoverflow)
GB (1) GB1437193A (enrdf_load_stackoverflow)
PL (1) PL87719B1 (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3959976A (en) * 1974-03-21 1976-06-01 Bochumer Eisenhutte Heintzmann & Company Excavation-roof support
US4056941A (en) * 1976-01-15 1977-11-08 Klockner-Werke Ag Mine roof support for an underground mine gallery
US4136999A (en) * 1976-02-10 1979-01-30 Thyssen Industrie Ag Canopy and shield structure for a supporting shield in a seam-like mine deposit
US4252477A (en) * 1978-10-07 1981-02-24 Bochumer Eisenhutte Heintzmann Gmbh & Co. Mine roof support
US4815898A (en) * 1986-09-09 1989-03-28 Gewerkschaft Eisenhutte Westfalia Gmbh Roof supports
CN103590847A (zh) * 2013-10-31 2014-02-19 山东新煤机械装备股份有限公司 单立柱双推移液压支架及推移机构与推移方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3779023A (en) * 1971-12-01 1973-12-18 Rheinstahl Ag Shield roof support

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3779023A (en) * 1971-12-01 1973-12-18 Rheinstahl Ag Shield roof support

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3959976A (en) * 1974-03-21 1976-06-01 Bochumer Eisenhutte Heintzmann & Company Excavation-roof support
US4056941A (en) * 1976-01-15 1977-11-08 Klockner-Werke Ag Mine roof support for an underground mine gallery
US4136999A (en) * 1976-02-10 1979-01-30 Thyssen Industrie Ag Canopy and shield structure for a supporting shield in a seam-like mine deposit
US4252477A (en) * 1978-10-07 1981-02-24 Bochumer Eisenhutte Heintzmann Gmbh & Co. Mine roof support
US4815898A (en) * 1986-09-09 1989-03-28 Gewerkschaft Eisenhutte Westfalia Gmbh Roof supports
CN103590847A (zh) * 2013-10-31 2014-02-19 山东新煤机械装备股份有限公司 单立柱双推移液压支架及推移机构与推移方法

Also Published As

Publication number Publication date
GB1437193A (en) 1976-05-26
DE2246745B1 (de) 1973-08-09
FR2200436B3 (enrdf_load_stackoverflow) 1976-08-20
FR2200436A1 (enrdf_load_stackoverflow) 1974-04-19
BE804720A (fr) 1974-01-02
DE2246745C2 (de) 1974-03-07
PL87719B1 (enrdf_load_stackoverflow) 1976-07-31

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