GB668397A - A method and apparatus for provisionally supporting the working faces of mines or the like - Google Patents
A method and apparatus for provisionally supporting the working faces of mines or the likeInfo
- Publication number
- GB668397A GB668397A GB12040/49A GB1204049A GB668397A GB 668397 A GB668397 A GB 668397A GB 12040/49 A GB12040/49 A GB 12040/49A GB 1204049 A GB1204049 A GB 1204049A GB 668397 A GB668397 A GB 668397A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lagging
- iron
- arms
- auxiliary
- roof support
- 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
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 24
- 229910052742 iron Inorganic materials 0.000 abstract 12
- 235000000396 iron Nutrition 0.000 abstract 4
- 239000003245 coal Substances 0.000 abstract 2
- 230000008878 coupling Effects 0.000 abstract 2
- 238000010168 coupling process Methods 0.000 abstract 2
- 238000005859 coupling reaction Methods 0.000 abstract 2
- 238000010276 construction Methods 0.000 abstract 1
- 230000037431 insertion Effects 0.000 abstract 1
- 238000003780 insertion Methods 0.000 abstract 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D17/00—Caps for supporting mine roofs
- E21D17/02—Cantilever extension or similar protecting devices
- E21D17/0213—Assembling devices for pivoting caps upwardly
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)
- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
Abstract
668,397. Mine roof supports. GROETSCHEL, K. M. May 5, 1949 [May 5, 1948], No. 12040/49. Class 20(ii) As the working coal face in a mine advances the permanent roof supports or lagging irons are connected to one another consecutively in alignment in the form of a chain and an auxiliary roof support k, h, i, Fig. 1, is laterally and detachably coupled so as to permit pivotal movement about a transverse axis to the forward end d of the lagging iron a fitted last, in order to support the roof adjacent the coal face pending the attachment of the next lagging iron a<SP>1</SP>, the arrangement being such that in its operative position the auxiliary roof support does not hamper the attachment of the hogging iron a<SP>1</SP> to the previous one a and the auxiliary support is removed after such attachment for use in the next advance. The lagging iron a has a forked forward end d, Figs. 1, 3, adapted to receive a tongue g at the rear end of the lagging iron a', which is pivotally secured therein by a pin c. A wedge e engaging the tongue g locks the two lagging irons a, a<SP>1</SP> rigidly together. The auxiliary roof support comprises a pair of two-armed levers h, k detachably carried on laterally projecting tubular pivots I on the end d of the lagging iron a, the pivots l being arranged over the holes b which receive the coupling pin c so that the latter can be inserted for the connection of the lagging irons a, a<SP>1</SP> unhampered by an already attached auxiliary roof support. Holes m in the rear arms k similarly allow the insertion of the wedge e. The forward arms h are extended by U-section bars i screwed to them and the rear arms k are connected by a bridge adapted to bear on the underside of the lagging iron a and comprising a bolt o, clamping jaws q, q<SP>1</SP> and distance piece p, Fig. 2. The oblique slots n in the arms k allow angular adjustment of the arms with respect to the lagging a. Alternative arrangements for securing the rear arms k to the lagging iron a and adjusting means therefore, Figs. 5, 6, 7 (not shown), may be used. The auxiliary roof support can be kept in a position of readiness suspended from the lagging iron a as shown in Fig. 1, adjustment of the bolt o providing sufficient lateral play for the arms k, h to enable them to be readily tilted up and secured on the pivots l. In a modified construction shown in Fig. 4, the lagging irons a, a<SP>1</SP> are coupled together by a simple link connection and the extensions i of the auxiliary roof support are secured to the lagging for angular adjustment, the lagging iron a<SP>1</SP> as a cantilever until it is supported by a prop. The pivotal supporting means and the means for coupling the rear arms k to the permanent lagging iron as shown in Figs. 1, 4 may be interchanged in position or may both be arranged at the rear end of the auxiliary lagging iron, the means for angular adjustment of the latter being then arranged either intermediate its ends or near its forward end.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR668397X | 1948-05-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB668397A true GB668397A (en) | 1952-03-19 |
Family
ID=9015008
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB12040/49A Expired GB668397A (en) | 1948-05-05 | 1949-05-05 | A method and apparatus for provisionally supporting the working faces of mines or the like |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB668397A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2959924A (en) * | 1954-01-29 | 1960-11-15 | Groetschel Karl Maria | Connection for lagging irons |
-
1949
- 1949-05-05 GB GB12040/49A patent/GB668397A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2959924A (en) * | 1954-01-29 | 1960-11-15 | Groetschel Karl Maria | Connection for lagging irons |
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