EP0306414B1 - Scaling device, in particular for hanging rock walls in mines, underground construction sites or the like - Google Patents

Scaling device, in particular for hanging rock walls in mines, underground construction sites or the like Download PDF

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Publication number
EP0306414B1
EP0306414B1 EP88420264A EP88420264A EP0306414B1 EP 0306414 B1 EP0306414 B1 EP 0306414B1 EP 88420264 A EP88420264 A EP 88420264A EP 88420264 A EP88420264 A EP 88420264A EP 0306414 B1 EP0306414 B1 EP 0306414B1
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EP
European Patent Office
Prior art keywords
pneumatic hammer
impact
rock
ellipsoid
head
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
EP88420264A
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German (de)
French (fr)
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EP0306414A1 (en
Inventor
Bernard Pradelle
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.)
Cessione Generale Des Matieres Nucleaire Cie
Original Assignee
SOREIS DITE Ste
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
Application filed by SOREIS DITE Ste filed Critical SOREIS DITE Ste
Priority to AT88420264T priority Critical patent/ATE69293T1/en
Publication of EP0306414A1 publication Critical patent/EP0306414A1/en
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Publication of EP0306414B1 publication Critical patent/EP0306414B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C37/00—Other methods or devices for dislodging with or without loading
    • E21C37/22—Hand tools or hand-held power-operated tools specially adapted for dislodging minerals

Definitions

  • the present invention relates to a drain device intended for use on a site, in particular in an underground mine or in an underground site.
  • the object of the present invention is to avoid these drawbacks by providing a drain device which makes it possible to quickly and effectively purge a rock wall, in particular after firing an explosive.
  • the striking head has substantially the shape of an ellipsoid flattened.
  • the cells have a substantially frustoconical shape, and they are hollowed out radially around the axis of revolution of the ellipsoid, which geometric axis corresponds with the longitudinal axis of the tool and the hammer pneumatic.
  • each frustoconical cell is arranged radially, substantially in the equatorial plane of the flattened ellipsoid.
  • the shape of the striking head makes it possible both to optimize its contact surface with the rock, and on the other hand, to best concentrate the energy of percussion, by reduction of mechanical inertia in areas that do not support the maximum of the impact stresses.
  • the pole 3 can have a length of the order of two to three meters. It carries a supply of compressed air from a flexible pipe 5.
  • the lower part of the pole 3 constitutes a handle 6, which the user 7 grasps with one of his hands 8.
  • a trigger 9 remotely controlling the operation of the pneumatic hammer 2.
  • the striking tool consists of the part 4, the rod 10 of which is surmounted by an enlarged head 11.
  • the latter is made of metal, in one piece with the rod 10.
  • the head 11 has the general shape of a flattened ellipsoid of revolution around the geometric axis 12 common to the head 11 and to the rod 10.
  • This head 11 is lightened by the presence of cells 13.
  • Each of these has a substantially frustoconical shape converging towards the center 14.
  • the longitudinal axis 15 of each of the cells 13 is substantially arranged in the equatorial plane 16 of the ellipsoid of revolution.
  • the rod 10 is preferably equipped, at mid-length with a flange 17, of a type known per se, intended to cooperate with the shifting spring 18 which protrudes, as usual, at the top of the hammer pneumatic 2.
  • the invention allows the user to optimize the efficiency of the trap, by means of a very simple operation which corresponds to a natural gesture. It suffices for him, in effect, to push the pole 3 more or less strongly against the block 21, to vary both the frequency and the amplitude of the shocks exerted by the head 4. These shock waves generated by the pneumatic hammer make up , in the fault, a resultant "wave mass" which returns in resonance with the generator, which causes the separation of the blocks. It will be noted that these advantages can be obtained on rocks of very diverse natures, in particular, in particular, because of the special honeycomb structure of the striking head 4.
  • Shock wave purging consists in generating an energy of variable amplitude and frequency, so as to compose, in fault 23, a resonant wave mass, which is amplified by the accumulation of energy.
  • the increase in the amplitude of a vibration (or shock waves) in the fault is therefore the result of a circuit in resonance with the period or the frequency imposed by the generator.
  • the shock wave 22 emitted by the hammer 2 is composed with the wave 24 reflected in return and of the same frequency.
  • the shock wave energy generated in the fault 23 resonates with the hammer 2, until the block 21 detaches.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Earth Drilling (AREA)
  • Control Of Position, Course, Altitude, Or Attitude Of Moving Bodies (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Cleaning In General (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Apparatuses And Processes For Manufacturing Resistors (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Tents Or Canopies (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Breeding Of Plants And Reproduction By Means Of Culturing (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • Tea And Coffee (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
  • Bidet-Like Cleaning Device And Other Flush Toilet Accessories (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)

Abstract

The present invention is a device for removing boulders loosened by an explosion, from the hanging roof of a mining gallery. The device is a pole which supports a pneumatic hammer and a striking head at one end thereof and a gripping handle at its opposite end. The handle has a trigger mechanism for remote control of the pneumatic hammer. The inner section of the striking head is a formation of hollow, honeycombed cells, for reducing the weight of the striking head.

Description

La présente invention est relative à un dispositif purgeur destiné à être utilisé sur un chantier, notamment dans une mine souterraine ou dans un chantier souterrain.The present invention relates to a drain device intended for use on a site, in particular in an underground mine or in an underground site.

On sait que dans nombre de chantiers souterrains ou pour l'exploitation des mines métalliques, l'abattage des roches s'effectue souvent à l'explosif. Après chaque tir, des roches tombent. On les ramasse et on les évacue pour faire avancer le chantier. Cependant, le roche ayant été fragmentée ou fragilisée par l'explosion, on constate qu'après le tir des blocs rocheux mal détachés ou enchevêtrés les uns dans les autres, demeurent suspendus au toit, c'est-à-dire au dessus du sol du chantier. Ces blocs ne peuvent pas tomber de leur propre poids. Certains restent liés au toit par une fragmentation non communicante. Dans tout les cas, ces blocs constituent un danger car ils risquent de tomber intempestivement au cours de la poursuite de l'exploitation du chantier. Pour réduire ce risque, il est donc connu de "purger" la paroi rocheuse, c'est-à-dire de l'explorer en la frappant manuellement à l'aide d'un marteau pour en détacher et évacuer les blocs en suspension.We know that in many underground sites or for the exploitation of metal mines, the mining of rocks is often carried out with explosives. After each shot, rocks fall. We collect them and evacuate them to move the work forward. However, the rock having been fragmented or weakened by the explosion, we note that after the firing of the poorly detached or entangled rock blocks, remain suspended from the roof, that is to say above the ground of the site. These blocks cannot fall from their own weight. Some remain linked to the roof by a non-communicating fragmentation. In any case, these blocks constitute a danger because they risk falling unexpectedly during the continued operation of the site. To reduce this risk, it is therefore known to "purge" the rock wall, that is to say to explore it by hitting it manually with a hammer to detach and remove the blocks in suspension.

Cette opération connue est coûteuse en main-d'oeuvre et elle ne permet pas de détacher de façon certaine certains blocs difficiles à extraire.This known operation is labor-intensive and does not allow certain blocks which are difficult to extract to be detached with certainty.

La présente invention a pour but d'éviter ces inconvénients en réalisant un dispositif purgeur permettant d'effectuer rapidement et efficacement la purge d'une paroi rocheuse notamment après un tir à l'explosif.The object of the present invention is to avoid these drawbacks by providing a drain device which makes it possible to quickly and effectively purge a rock wall, in particular after firing an explosive.

Un dispositif purgeur selon l'invention est caractérisé en ce qu'il comprend en combinaison:

  • ― un marteau pneumatique;
  • ― une perche dont l'extrémité supérieure supporte le marteau pneumatique alors que son extrémité inférieure comporte une poignée de préhension et au moins une gachette de commande pour actionner à distance le marteau pneumatique,
  • ― à l'extrémité libre du marteau pneumatique, une pièce de frappe constituée par une tige que surmonte une large tête percutante, allégée par des alvéoles intérieurs creux.
A drain device according to the invention is characterized in that it comprises in combination:
  • - an air hammer;
  • - a pole, the upper end of which supports the pneumatic hammer while its lower end comprises a grip handle and at least one control trigger for actuating the pneumatic hammer from a distance,
  • - at the free end of the pneumatic hammer, a striking part consisting of a rod surmounted by a large percussive head, lightened by hollow internal cells.

Suivant une autre caractéristique de l'invention, la tête de frappe a sensiblement la forme d'un ellipsoïde aplati.According to another characteristic of the invention, the striking head has substantially the shape of an ellipsoid flattened.

Suivant une autre caractéristique de l'invention, les alvéoles ont une forme sensiblement tronconique, et ils sont creusés radialement autour de l'axe de révolution de l'ellipsoïde, lequel axe géométrique correspond avec l'axe longitudinal de l'outil et du marteau pneumatique.According to another characteristic of the invention, the cells have a substantially frustoconical shape, and they are hollowed out radially around the axis of revolution of the ellipsoid, which geometric axis corresponds with the longitudinal axis of the tool and the hammer pneumatic.

Suivant une autre caractéristique de l'invention, l'axe géométrique de chaque alvéole tronconique est disposé radialement, sensiblement dans le plan équatorial de l'ellipsoïde aplati.According to another characteristic of the invention, the geometric axis of each frustoconical cell is arranged radially, substantially in the equatorial plane of the flattened ellipsoid.

Suivant une autre caractéristique de l'invention, la forme de la tête de frappe permet à la fois d'optimiser sa surface de contact avec la roche, et d'autre part, de concentrer au mieux l'énergie de percussion, par réduction de l'inertie mécanique dans les zones ne supportant pas le maximum des contraintes de frappe.According to another characteristic of the invention, the shape of the striking head makes it possible both to optimize its contact surface with the rock, and on the other hand, to best concentrate the energy of percussion, by reduction of mechanical inertia in areas that do not support the maximum of the impact stresses.

Le dessin annexé, donné à titre d'exemple non limitatif, permettra de mieux comprendre les caractéristiques de l'invention, et les avantages qu'elle est susceptible de procurer.

  • Figure 1 montre un appareil selon l'invention, en cours d'utilisation, pour purger le toit d'une galerie de mine.
  • Figure 2 montre le détail du montage de la pièce de frappe équipant l'extrémité du marteau.
  • Figure 3 montre la poignée de commande équipant l'extrémité inférieure de la perche.
The appended drawing, given by way of nonlimiting example, will allow a better understanding of the characteristics of the invention, and the advantages which it is likely to provide.
  • Figure 1 shows an apparatus according to the invention, in use, for purging the roof of a mine gallery.
  • Figure 2 shows the detail of the assembly of the striking piece equipping the end of the hammer.
  • Figure 3 shows the control handle fitted to the lower end of the pole.

Le dispositif purgeur 1 représenté sur les dessins comprend en combinaison:

  • ― un marteau pneumatique 2;
  • ― une perche de support 3;
  • ― une pièce de frappe 4.
The drain device 1 shown in the drawings comprises in combination:
  • - a pneumatic hammer 2;
  • - a support pole 3;
  • - a striking piece 4.

La perche 3 peut avoir une longueur de l'ordre de deux à trois mètres. Elle porte une alimentation en air comprimé à partir d'une canalisation flexible 5. De plus, la partie inférieure de la perche 3 constitue une poignée 6, que l'utilisateur 7 saisit avec l'une de ses mains 8. Ainsi, avec sa main 8, il a la possibilité d'actionner une gachette 9, commandant à distance le fonctionnement du marteau pneumatique 2.The pole 3 can have a length of the order of two to three meters. It carries a supply of compressed air from a flexible pipe 5. In addition, the lower part of the pole 3 constitutes a handle 6, which the user 7 grasps with one of his hands 8. Thus, with his hand 8, it has the ability to operate a trigger 9, remotely controlling the operation of the pneumatic hammer 2.

A son extrémité, celui-ci peut recevoir à la manière habituelle, la tige 10 d'un outil de frappe. Dans le cas de l'invention, l'outil de frappe est constitué par la pièce 4, dont la tige 10 est surmontée par une tête élargie 11. Cette dernière est réalisée en métal, d'une pièce avec la tige 10. La tête 11 a la forme générale d'un ellipsoïde aplati de révolution autour de l'axe géométrique 12 commun à la tête 11 et à la tige 10.At its end, it can receive in the usual way, the rod 10 of a striking tool. In the case of the invention, the striking tool consists of the part 4, the rod 10 of which is surmounted by an enlarged head 11. The latter is made of metal, in one piece with the rod 10. The head 11 has the general shape of a flattened ellipsoid of revolution around the geometric axis 12 common to the head 11 and to the rod 10.

Cette tête 11 est allégée par la présence d'alvéoles 13. Chacun de ceux-ci a une forme sensiblement tronconique convergeant vers le centre 14. L'axe longitudinal 15 de chacun des alvéoles 13 est sensiblement disposé dans le plan équatorial 16 de l'ellipsoïde de révolution. Enfin, la tige 10 est préférablement équipée, à mi-longueur d'une collerette 17, d'un type en lui-même connu, prévue pour coopérer avec le ressort décaleur 18 qui dépasse, comme à l'habitude, au sommet du marteau pneumatique 2.This head 11 is lightened by the presence of cells 13. Each of these has a substantially frustoconical shape converging towards the center 14. The longitudinal axis 15 of each of the cells 13 is substantially arranged in the equatorial plane 16 of the ellipsoid of revolution. Finally, the rod 10 is preferably equipped, at mid-length with a flange 17, of a type known per se, intended to cooperate with the shifting spring 18 which protrudes, as usual, at the top of the hammer pneumatic 2.

Le fonctionnement est le suivant:The operation is as follows:

Après un tir à l'explosif dans une galerie de mine 19 (figure 1), certaines parties du toit 20 ont été fragilisées par l'explosion, sans pour autant être tombées par leur propre poids. Il en va ainsi, par exemple, du bloc rocheux 21, qui reste lié au toit 20 par une fragmentation non communicante. Il est alors nécessaire de "purger" le toit 20, avant que des ouvriers puissent venir travailler sans risque dans la galerie 19.After an explosive shot in a mine gallery 19 (FIG. 1), certain parts of the roof 20 were weakened by the explosion, without however having fallen by their own weight. This is the case, for example, with the rock block 21, which remains linked to the roof 20 by a non-communicating fragmentation. It is then necessary to "purge" the roof 20, before workers can come to work safely in the gallery 19.

On notera que l'invention perment à l'utilisateur d'optimiser l'efficacité du purgeur, moyennant une opération très simple qui correspond à un geste naturel. Il lui suffit, effet, de pousser la perche 3 plus ou moins fort contre le bloc 21, pour faire varier à la fois la fréquence et l'amplitude des chocs exercés par la tête 4. Ces ondes de choc engendrées par le marteau pneumatique composent, dans la faille, une résultante "masse d'ondes" qui rentre en résonance avec le générateur, ce qui provoque le décollement des blocs. On notera que ces avantages peuvent être obtenus sur des roches de natures très diverses, en particulier, notamment, du fait de la structure alvéolée particulière de la tête de frappe 4.It will be noted that the invention allows the user to optimize the efficiency of the trap, by means of a very simple operation which corresponds to a natural gesture. It suffices for him, in effect, to push the pole 3 more or less strongly against the block 21, to vary both the frequency and the amplitude of the shocks exerted by the head 4. These shock waves generated by the pneumatic hammer make up , in the fault, a resultant "wave mass" which returns in resonance with the generator, which causes the separation of the blocks. It will be noted that these advantages can be obtained on rocks of very diverse natures, in particular, in particular, because of the special honeycomb structure of the striking head 4.

La purge par ondes de chocs consiste à engendrer une énergie d'amplitude et de fréquence variables, de façon à composer, dans la faille 23, une masse d'ondes résonante, qui s'amplifie grâce à l'accumulation d'énergie.Shock wave purging consists in generating an energy of variable amplitude and frequency, so as to compose, in fault 23, a resonant wave mass, which is amplified by the accumulation of energy.

L'accroissement de l'amplitude d'une vibration (ou ondes de chocs) dans la faille est donc le résultat d'un circuit en résonance avec la période ou la fréquence imposée par le générateur.The increase in the amplitude of a vibration (or shock waves) in the fault is therefore the result of a circuit in resonance with the period or the frequency imposed by the generator.

Ainsi, l'onde de choc 22 émise par le marteau 2 se compose avec l'onde 24 réfléchie en retour et de même fréquence. L'énergie d'onde de choc engendrée dans la faille 23 entre en résonance avec la marteau 2, jusqu'à provoquer le détachement du bloc 21.Thus, the shock wave 22 emitted by the hammer 2 is composed with the wave 24 reflected in return and of the same frequency. The shock wave energy generated in the fault 23 resonates with the hammer 2, until the block 21 detaches.

Claims (6)

1. Drain cock device for the rocky roof of an underground site, wherein it comprises a combination of:
― a pneumatic hammer (2);
― a pole (3) whose upper extremity bears the pneumatic hammer (2), whereas its lower extremity comprises a gripping handle (6) and at least one control trigger for remotely activating the pneumatic hammer (2);
― at the free extremity of the pneumatic hammer (2), an impact piece (4) formed of a rod (10) surmounted by a wide impact drilling attachment (11) lightened by hollow internal cavities (13).
2. Device according to claim 1, wherein the impact head (4) has roughly the shape of an ellipsoid.
3. Device according to claim 2, wherein the cavities (13) have a roughly truncated shape and are radially hollowed around the axis of revolution (12) of the ellipsoid whose geometrical axis (12) corresponds with the longititunal axis of the tool (4) and pneumatic hammer (2).
4. Device according to any one of the above-mentioned claims, wherein the geometrical axis (15) of each truncated cavity (13) is radially disposed roughly inside the equatorial plane of the flattened ellipsoid of the head (11).
5. Device according to any one of the previous claims, wherein the shape of the impact head (11) makes it possible to simultaneously optimize its contact surface with the rock (21) and secondly to fully concentrate the percussion energy by reducing the mechanical inertia in the zones not fully supporting the impact stresses.
6. Device according to any one of the above-mentioned claims, wherein it generates in a fault in the rock a shock wave energy able to resonate with the pneumatic hammer (2) so as to loosen blocks of rock (2).
EP88420264A 1987-08-06 1988-07-26 Scaling device, in particular for hanging rock walls in mines, underground construction sites or the like Expired - Lifetime EP0306414B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88420264T ATE69293T1 (en) 1987-08-06 1988-07-26 CLEARING DEVICE, PARTICULARLY FOR ROCK FIRST IN MINING, ON UNDERGROUND CONSTRUCTION SITES OR THE LIKE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8711384 1987-08-06
FR8711384A FR2619157B1 (en) 1987-08-06 1987-08-06 BLEEDING DEVICE, PARTICULARLY FOR ROCKY ROOF IN MINES, UNDERGROUND CONSTRUCTION SITES OR THE LIKE

Publications (2)

Publication Number Publication Date
EP0306414A1 EP0306414A1 (en) 1989-03-08
EP0306414B1 true EP0306414B1 (en) 1991-11-06

Family

ID=9354075

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88420264A Expired - Lifetime EP0306414B1 (en) 1987-08-06 1988-07-26 Scaling device, in particular for hanging rock walls in mines, underground construction sites or the like

Country Status (9)

Country Link
US (1) US4871214A (en)
EP (1) EP0306414B1 (en)
AT (1) ATE69293T1 (en)
AU (1) AU2039688A (en)
DE (1) DE3866071D1 (en)
FI (1) FI883564A (en)
FR (1) FR2619157B1 (en)
NO (1) NO883477L (en)
PT (1) PT88213B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2077485B1 (en) * 1991-07-11 1996-08-01 Ingemas S A SUPPLEMENTARY PUSHING MECHANISM FOR PERCUSSION HAMMERS.
US5409300A (en) * 1994-02-23 1995-04-25 Bourgoin; Claude Mechanized scaling bar
US5407252A (en) * 1994-09-01 1995-04-18 Carey Salt Company, Inc. Method and apparatus for scaling mine roofs and ribs
ZA200403542B (en) * 2001-11-22 2008-01-30 Burger Nicolaas Daniel Lombard Rock prying apparatus for hanging roof in mines
CN104677215A (en) * 2015-02-10 2015-06-03 东北大学 Device for carrying out dredging treatment on plugged blast hole

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR528316A (en) * 1919-10-09 1921-11-10 Wilhelm Fachinger Tool for coal mining
US1884653A (en) * 1930-05-27 1932-10-25 Sullivan Machinery Co Demolishing pick
US2004083A (en) * 1930-09-15 1935-06-04 Cleveland Pneumatic Tool Co Tool attachment
US1926042A (en) * 1931-10-12 1933-09-12 Sullivan Machinery Co Power operated tool
US3036482A (en) * 1960-09-02 1962-05-29 Kenworthy Kenneth Axial-impact type hand tool
CA926614A (en) * 1971-03-01 1973-05-22 Richard Austin E. Method and apparatus for shattering concrete encasements for conduits
US3857448A (en) * 1971-11-15 1974-12-31 Proline Ind Pty Ltd Hydraulically operated tamper
FR2152546B1 (en) * 1972-07-31 1974-11-08 Poclain Sa

Also Published As

Publication number Publication date
FR2619157B1 (en) 1991-11-22
US4871214A (en) 1989-10-03
EP0306414A1 (en) 1989-03-08
PT88213A (en) 1989-06-30
NO883477L (en) 1989-02-07
PT88213B (en) 1993-09-30
DE3866071D1 (en) 1991-12-12
FI883564A (en) 1989-02-07
FR2619157A1 (en) 1989-02-10
NO883477D0 (en) 1988-08-04
FI883564A0 (en) 1988-07-29
AU2039688A (en) 1989-02-09
ATE69293T1 (en) 1991-11-15

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