US3313114A - Mine roof supporting method - Google Patents

Mine roof supporting method Download PDF

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Publication number
US3313114A
US3313114A US342870A US34287064A US3313114A US 3313114 A US3313114 A US 3313114A US 342870 A US342870 A US 342870A US 34287064 A US34287064 A US 34287064A US 3313114 A US3313114 A US 3313114A
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United States
Prior art keywords
units
group
roof
unit
another
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Expired - Lifetime
Application number
US342870A
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English (en)
Inventor
Haarmann Gert
Felde Hans Werner Vom
Buttner Hans
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Bergbaustahl GmbH
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Bergbaustahl Gmbh & Co
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    • 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
    • E21D23/0052—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor with advancing shifting devices connected therewith
    • 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
    • E21D23/0047—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor without essential shifting devices

Definitions

  • the present invention provides a method of this kind which can be used with frictional and hydraulic props and also with roof bars of conventional construction, and the method differs from the known comparable walking support method for roofs particularly in that the walking operation is effected without any interruption to the continuous support of the roof during any stage whatever.
  • the method according to the invention consists basically in that the forward and the rear roof supports are each formed from two units, which are disposed successively in the strike, and which are combined into groups, and which each consist of a prop and a roof bar, the said units being disposed immediately side by side and staggered with respect to one another by the length of a unit at the maximum, and the forward unit of the rear group is released and moved out of this initial position while being guided along the successive units of the forward group, as far as possible so as to directly follow the advance of the coal face, so as to be brought into a position projecting beyond the forward unit of the forward group and then, after respective relocking and release is intermittently advanced further into the position adjacent the coal face until the rear end of its roof bar has reached the forward end zone of the roof bar of the forward unit of the initially forward group, whereupon the rear unit of the originally rear group is guided along the other group units which still remain locked, until it is drawn along to bring it up to the forward unit.
  • the two units of the originally rear and now forward group then form the guide for the advance of the units of the other group in the same rhythm.
  • there is an uninterrupted support for the roof which consists of at least three units following one another in the direction of the strike, these units remaining locked until the final phase of the ad- Vance.
  • the foremost unit may in the extreme case be in its position adjacent the coal face in a position in which the rear edge of its roof bar is flush with the forward edge of the forward bar of the adjacent unit. As a rule, however, there will be a certain degree of overlapping so that the guidance of the adjacent units on one another is not lost.
  • a particular advantage of the new method is that the elements of the units used with this method, namely props and roof bars, are of conventional construction, the only need for adaptation to the new method being that the roof bars of the adjacent groups are provided with interengaging guide means, for example rails or the like, at their mutually facing sides.
  • the roof bars of the units are preferably so underpinned as to load the head of the roof bar towards the coal face. This improves the conditions for guidance along the adjacent roof bar.
  • the props of the individual sets are of course provided with base plates or skids enabling them to slide over the floor in the usual way.
  • the double-acting intermittently extensible advancing cylinders are required in principle for the advance of the individual groups with the above-indicated rhythm, one such cylinder being provided for each of the two groups and acting on one unit of the group,
  • a single advancing cylinder may be provided which, after the completion of the advance of one group, performs the complete task, for example by means of a cross-head provided on its piston rod and to which the unit of the other group to be advanced is connected.
  • FIGURE 1 is a diagrammatic illustration, in plan view, of a mine supporting assembly comprised of three sets, each of which consists of two groups of supporting elements which are arranged in side-by-side relationship in a typically supporting position;
  • FIGURES 2 to 5 show the apparatus illustrated in FIGURE 1 wherein the forward support units of one group of supporting elements on the left hand side of the drawing are actuated through varying advancing positions within the mine chamber to be supported;
  • FIGURE 6 shows apparatus illustrated in FIGURE 1 wherein the rear units of the group on the left hand side of the drawings are advanced up to the forward unit of the group;
  • FIGURE 7 is similar to FIGURES 1 to 6 and shows the units of the groups on the right hand side of the drawing being actuated to different positions of support.
  • each of the two adjacent groups of roof supports consists of two units 1, 2 and 3, 4 respectively and each of the units consists of a roof bar borne by a prop indicated just by a dot in the diagrammatic illustration.
  • the drawing shows in each case three sets, each of which consists of two groups and which are arranged side by side at falling intervals, and the units of which, as illustrated, can be advanced either simultaneously or individually by means of the advancer devices (not shown)-advancer cylinders or mechanical devices having a similar action.
  • the two units 1 and 2 of the rear group are so disposed with respect to the units of the forward group 3 and 4 as to be in a position in which the forward unit 1 of the rear group fully overlaps the rear unit 3 of the forward group.
  • This position is not absolutely essential, however, and has been chosen only to simplify matters.
  • FIG. URES 3 and 4 illustrate the next stages, in which the forward unit has been advanced additionally until in the extreme case the stage illustrated in FIG- URE 5 is reached. It should, however, be pointed out that the end stages which are shown in the purely diagrammatic drawing and in which there is no overlapping of the adjacent units of the forward and rear groups, has been chosen only to facilitate matters. In practice, there will always be a certain amount of overlapping and hence guidance of the adjacent units with respect to one another. a
  • the new method can be performed with conventional props and roof bars, a pit can at all times be changed over to the new method while continuing to use existing support material and utilise the advantages of the new method without expensive investment.
  • a walking support method for mine roofs first and second roof support groups being laterally disposed and guided on one another and advanced alternately, characterized in that said first and second roof groups are each formed of at least two units disposed successively along the mine roof, each of said units comprising an elongated roof bar and prop means therefor, said successive units being capable of abutting one another and also capable of being spaced in relation to one another by the length of two units at the maximum, wherein the forward units of said first group is intermittently guided along said second group of units which remain in an unchanged position following the same along the mine roof so as to be brought into a position projecting as far as possible from the forward units of said second group so as to directly follow the advance of the coal face until its rear end reaches the zone of the forward end of the front unit of said second group, whereupon the rear unit of said first group is then guided along the units of said second group until the rear unit of said first group is advanced up to the forward unit of said first group, and thereafter the two units of said first group remain in an unchanged position and form the
  • each of said units consists of a roof bar supportedby a prop, said roof bars of said units of one of said groups being positively guided along said adjacent roof bar of the other group and being supported by its respective prop in such manner as to continuously support the mine roof.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Harvester Elements (AREA)
  • Lining And Supports For Tunnels (AREA)
US342870A 1963-02-09 1964-02-04 Mine roof supporting method Expired - Lifetime US3313114A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB70667A DE1257719B (de) 1963-02-09 1963-02-09 Verfahren zum wandernden Ausbau von Abbaustreben

Publications (1)

Publication Number Publication Date
US3313114A true US3313114A (en) 1967-04-11

Family

ID=6976745

Family Applications (1)

Application Number Title Priority Date Filing Date
US342870A Expired - Lifetime US3313114A (en) 1963-02-09 1964-02-04 Mine roof supporting method

Country Status (5)

Country Link
US (1) US3313114A (de)
AT (1) AT241392B (de)
BE (1) BE643537A (de)
DE (1) DE1257719B (de)
GB (1) GB1035112A (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2694293A (en) * 1953-05-08 1954-11-16 Hydrauliques Pour L Ind Minier Propping device for roofs of mine levels
GB883407A (en) * 1959-06-06 1961-11-29 Rheinstahl Gmbh Wanheim Improvements in mine roof support assemblies
FR1278986A (fr) * 1961-01-31 1961-12-15 Hemscheidt Maschf Hermann Soutènement hydraulique pour gisement en dressant avec déhouillement flottant
FR1287138A (fr) * 1961-04-20 1962-03-09 Gutehoffnungshuette Sterkrade Soutènement déplaçable pour galeries de mines
US3186179A (en) * 1961-09-06 1965-06-01 Gewerk Eisenhuette Westfalia Advanceable mining support arrangement

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1070316A (fr) * 1952-02-05 1954-07-22 Coal Industry Patents Ltd Support de toit pour mines
DE1037990B (de) * 1955-07-04 1958-09-04 Becorit Grubenausbau Gmbh Wandernder Strebausbau
DE1088904B (de) * 1957-08-10 1960-09-15 Gewerk Eisenhuette Westfalia Hydraulischer Ausbau fuer bergmaennische Gewinnungsbetriebe

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2694293A (en) * 1953-05-08 1954-11-16 Hydrauliques Pour L Ind Minier Propping device for roofs of mine levels
GB883407A (en) * 1959-06-06 1961-11-29 Rheinstahl Gmbh Wanheim Improvements in mine roof support assemblies
FR1278986A (fr) * 1961-01-31 1961-12-15 Hemscheidt Maschf Hermann Soutènement hydraulique pour gisement en dressant avec déhouillement flottant
FR1287138A (fr) * 1961-04-20 1962-03-09 Gutehoffnungshuette Sterkrade Soutènement déplaçable pour galeries de mines
US3186179A (en) * 1961-09-06 1965-06-01 Gewerk Eisenhuette Westfalia Advanceable mining support arrangement

Also Published As

Publication number Publication date
GB1035112A (en) 1966-07-06
DE1257719B (de) 1968-01-04
AT241392B (de) 1965-07-26
BE643537A (de) 1964-05-29

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