EP1840322B1 - Rotary percussion drilling device and method - Google Patents

Rotary percussion drilling device and method Download PDF

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Publication number
EP1840322B1
EP1840322B1 EP06356035A EP06356035A EP1840322B1 EP 1840322 B1 EP1840322 B1 EP 1840322B1 EP 06356035 A EP06356035 A EP 06356035A EP 06356035 A EP06356035 A EP 06356035A EP 1840322 B1 EP1840322 B1 EP 1840322B1
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EP
European Patent Office
Prior art keywords
flexible tubing
perforating body
drilling device
water pump
carrying vehicle
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.)
Not-in-force
Application number
EP06356035A
Other languages
German (de)
French (fr)
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EP1840322A1 (en
Inventor
Frédéric Brongniart
Franck Leon
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.)
Sandvik Mining and Construction Oy
Sandvik Mining and Construction Lyon SAS
Original Assignee
Sandvik Mining and Construction Oy
Sandvik Mining and Construction Lyon SAS
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 Sandvik Mining and Construction Oy, Sandvik Mining and Construction Lyon SAS filed Critical Sandvik Mining and Construction Oy
Priority to DE602006003187T priority Critical patent/DE602006003187D1/en
Priority to PL06356035T priority patent/PL1840322T3/en
Priority to EP06356035A priority patent/EP1840322B1/en
Priority to AT06356035T priority patent/ATE411446T1/en
Publication of EP1840322A1 publication Critical patent/EP1840322A1/en
Application granted granted Critical
Publication of EP1840322B1 publication Critical patent/EP1840322B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/06—Means for driving the impulse member
    • B25D9/12—Means for driving the impulse member comprising a built-in liquid motor, i.e. the tool being driven by hydraulic pressure
    • B25D9/125—Means for driving the impulse member comprising a built-in liquid motor, i.e. the tool being driven by hydraulic pressure driven directly by liquid pressure working with pulses
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B1/00—Percussion drilling
    • E21B1/12—Percussion drilling with a reciprocating impulse member
    • E21B1/24—Percussion drilling with a reciprocating impulse member the impulse member being a piston driven directly by fluid pressure
    • E21B1/30—Percussion drilling with a reciprocating impulse member the impulse member being a piston driven directly by fluid pressure by air, steam or gas pressure
    • E21B1/32—Percussion drilling with a reciprocating impulse member the impulse member being a piston driven directly by fluid pressure by air, steam or gas pressure working with pulses
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B1/00—Percussion drilling
    • E21B1/38—Hammer piston type, i.e. in which the tool bit or anvil is hit by an impulse member
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/06—Down-hole impacting means, e.g. hammers
    • E21B4/14—Fluid operated hammers
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/16—Plural down-hole drives, e.g. for combined percussion and rotary drilling; Drives for multi-bit drilling units
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/20—Drives for drilling, used in the borehole combined with surface drive
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B6/00—Drives for drilling with combined rotary and percussive action
    • E21B6/06—Drives for drilling with combined rotary and percussive action the rotation being intermittent, e.g. obtained by ratchet device
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B6/00—Drives for drilling with combined rotary and percussive action
    • E21B6/06—Drives for drilling with combined rotary and percussive action the rotation being intermittent, e.g. obtained by ratchet device
    • E21B6/08—Separate drives for percussion and rotation

Definitions

  • the present invention relates to the field of drilling during underground work, particularly in mining. It relates in particular to a rotopercussion drilling device, adapted for use in low-rise mine galleries, in particular for drilling holes in the "roof" of such galleries. The invention also relates to a rotopercussion drilling method, implemented by this device.
  • a conventional drilling device used for this purpose, comprises a drill with a drill bar, the drill being moved vertically along a slide and exerting a roto-percussion action.
  • This device is not well suited for use in low-rise mine galleries, because the maximum hole depth is limited by the gallery height and the length of the drill. For example, in a 1.10-meter high mine gallery, and with a 300-mm-long drill, the maximum hole depth is about 700 mm, given the games needed to handle the tools - here about 100 mm to maneuver the drill bar.
  • a known solution is to mount a drill string drill on the drill, but this solution is heavy and constraining because it requires to gather successive rods successively to each other, and disconnect and reconnect the drill to the drill string, as the drilling hole deepens.
  • the patent US 4254638 A shows a rotary drilling device carried by a vehicle of low height and thus able to work in a mine gallery of low height.
  • the drilling is performed by purely mechanical means, comprising a shaft formed of short successive sections articulated between them and rotating inside a bent casing.
  • This drilling device is not rotopercutant type, and it does not use hydraulic energy.
  • WO 95/04207 A discloses a rotopercutant drilling device of the type "downhole hammer", which can be fed by a source of fluid under pressure creating pressure pulses.
  • the hammer comprises a piston mounted to move along the axis of this hammer, this piston directly carrying a cutter.
  • the guide of the piston is such that its advance is accompanied by a rotation of said piston, so the cutting.
  • the hammer thus creates its own rotational movement.
  • the document GB 2126940 A discloses a percussion mechanism remotely actuated by a gaseous fluid displacement device, creating pulses transmitted to a piston mounted axially slidably in a drill body, and striking a drill tool placed in front of the drill body.
  • this tool is not rotopercutant, the drill does not create a rotational movement and the connecting conduit that feeds this drill does not transmit any rotational movement.
  • the present invention aims to overcome these drawbacks by providing a rotopercutant drilling device for drilling deep holes and small diameter, while remaining suitable for use in low pit galleries.
  • the subject of the invention is a rotopercussion drill device adapted for use in low-height mine galleries, the device comprising a low-height carrier vehicle, a high-pressure water pump placed on the carrier vehicle, a generally cylindrical perforator body with a main axis, a flexible casing connecting the piercer body to the remote water pump, and a solenoid valve interposed on the vehicle carrier, between the water pump and the starting point of the flexible casing, a striking piston being mounted movable in translation and resiliently biased into the perforator body, and being subjected to a high pulsating pressure of water so as to be animated a percussion movement against an anvil cutting-holder, the solenoid valve receiving in operation successive electric pulses for opening and closing control, which create shock waves on the water line contained in the flexible casing, which transmits these shock waves to the striking piston of the piercer body, the flexible casing simultaneously transmitting to the piercer body a movement of t rotation around its main axis.
  • the idea underlying the invention is to deport, outside the hole to be drilled, on a carrier vehicle of low height, pulsed distribution means of water under high pressure, acting on the piston of striking, which reduces the length and diameter of the drill body and thus drill deep holes and small diameter, without being limited by the height of the mine gallery.
  • a hydraulic accumulator is associated, on the carrier vehicle, with the water pump, in order to clip the pressure peaks generated by the pump.
  • means for moving forward and guiding the flexible casing are provided on the carrier vehicle to transmit to the drill body a thrust movement, the drilled hole depth being substantially equivalent to the driving stroke of the flexible casing .
  • the means of displacement in front of the flexible casing comprise, for example, a platform mounted in horizontal translation on a chassis of the carrier vehicle, in the direction of the length of this frame, platform on which the water pump is mounted, the solenoid valve and an electric pulse generator coupled to the solenoid valve, the platform being movable in translation in the direction of the length of the frame, by motorized control means.
  • the maximum depth of the drilled hole is here advantageously limited only by the length of the flexible casing, and by the advance stroke of the platform.
  • the means for moving forward of the flexible casing comprises a unwinder, mounted on the carrier vehicle, on which is wound the flexible casing, a rotary joint connecting the starting point of this flexible casing to the water pump.
  • the means for guiding the flexible tubing in translation may comprise a slideway or a deflection and guide channel in the vertical direction, in particular in the shape of a bend, arranged at the front of the carrier vehicle.
  • means for rotating the flexible casing are provided on the carrier vehicle to transmit to the drill body a reciprocating movement about its main axis.
  • the device may further comprise means for supporting and guiding the piercing body at the initiation of a hole to be drilled so as to ensure the correct positioning and vertical guidance of the piercer body.
  • the piercer body may have openings, in particular grooves, through which water and broken rock debris are removed during drilling, the water being used here advantageously to evacuate the debris from rocks released by drilling. .
  • the invention also relates to a rotopercussion drilling method, adapted for use in low-height mine galleries, with the use of a perforator body connected by flexible tubing to a high-pressure water pump. , a striking piston being movably mounted in translation in the body of the perforator, and subjected to a high pulsating pressure of water, shock waves being generated in the water at a distance from the perforator, more particularly outside the current hole of drilling, and being transmitted to the punching piston of the piercer body by the water line contained in the flexible casing, the water released at the piercer body being used to evacuate the debris of rocks released during the boring.
  • a carrier vehicle 1 ensures the displacement of the drilling device according to the invention in a mine gallery G of low height H between 1.0 and 1.5 meters, for example 1.1 meters.
  • the carrier vehicle 1 comprises a rigid monobloc frame 2, of parallelepipedal general shape, located at a relatively low height above the ground on which the carrier vehicle 1 moves by four driving wheels, two rear wheels 3 and two front wheels 4
  • On the upper face of the frame 2 is mounted a mobile platform 5, displaceable in the direction of the length of the frame 2 on a stroke C, by motorized control means, not shown, for example a motor carried by the frame 2 and an endless chain transmission.
  • a perforator body 8 of generally cylindrical shape with a main axis A, and length L, is placed in use at the level of hole to drill, and connected by a flexible casing 7 to a water pump 11 under high pressure, about 150 bars, mounted on the mobile platform 5 and connected to the rear of the vehicle 1, a water supply 6.
  • the water pump 11 may comprise an integrated pressure limiter.
  • a striking piston 15 is movably mounted, resiliently biased by a return spring 16, into the piercer body 8 (see FIG. figure 3 ), and subjected to a high pulsating pressure of water so as to be driven in a percussion movement against an anvil cutting holder 17, by the means detailed below.
  • the perforator body 8 comprises, at the rear, a coupling 19 for its connection to the flexible casing 7.
  • a solenoid valve 13 is interposed, on the mobile platform 5, between the water pump 11 and the starting point of the flexible casing 7.
  • the solenoid valve 13 is coupled to an electric pulse generator 12 whose frequency may be between and 70 Hz.
  • a hydraulic accumulator 14, also mounted on the mobile platform 5, allows clipping of the pressure peaks related to the water pump 11.
  • Rotating drive means of the flexible casing 7, in particular rollers 10, are provided on the mobile platform 5.
  • a guide rail 9, in the form of a bend, is arranged at the front of the carrier vehicle 1 in order to deflect and guide in translation, in vertical direction, the flexible casing 7.
  • the drilling is ensured by the different movements, described below, percussion, thrust and rotation.
  • the solenoid valve 13 receives, from the pulse generator 12, successive electrical pulses 1 to alternately control its opening and closing, which create shock waves on the water line contained in the flexible casing 7.
  • the flexible casing 7 transmits these shock waves to the striking piston 15 mounted in the piercer body 8.
  • the striking piston 15 is driven in a percussion movement against the cutting anvil 17 of the piercer body 8.
  • the rollers 10 drive the flexible tubing 7 in rotation so that it simultaneously transmits to the cutting bit anvil 17 an alternating rotational movement R about the main axis A of the perforator body 8.
  • This movement of rotation is advantageous compared to a unidirectional rotation movement, because it allows to break the rock without having to rotate the large assembly of the elements mounted on the carrier vehicle 1.
  • the mobile platform 5 is moved in translation longitudinally on the frame 2, as and when the drilling, an initial position, which corresponds to a beginning of drilling (see figure 1 ) at an end position in which the desired depth P of the drilled hole T is reached (see figure 2 ).
  • the depth P of the drilled hole T is equivalent to the driving stroke of the flexible casing 7, which is advantageously limited only by the total length of the flexible casing 7, increased by the length L of the piercer body 8, and by the translation travel C of the mobile platform 5.
  • the platform 5 progressively advances the flexible casing 7 in the deflection guide and vertical guide 9.
  • the flexible casing 7 transmits this thrust movement to the body of the perforator 8, which allows it to drill more deep in the rock, until reaching the maximum depth P of hole, here for example 1.50 meters. It is of course possible to reach lower depths, by reducing the stroke C of the platform 5.
  • an organ 18 for supporting and guiding the body. of perforator 8 (see figure 1 ), so as to properly position the body of perforator 8 and ensure its initial rectilinear guidance, before it guides itself in the hole portion already drilled.

Abstract

The device has a drilling body connected by a flexible tubing (7) to a high pressure water pump (11) that is placed on a low height carrier vehicle (1). A selenoid valve (13) is interposed, on the vehicle, between the pump and a starting point of the tubing. The valve receives successive electric pulses (I) which create shock waves on a water line in the tubing that transmits the waves till to a strike piston of the body. The tubing is driven in rotation by a roller (10) to transmit an alternative rotational movement to the drilling body around a main axis (A). The body comprises of several grooves, and is supported and guided by a support and guiding unit (18) while starting to drill a hole. An independent claim is also included for a rotary percussive drilling process for the usage in low height driftway.

Description

La présente invention concerne le domaine de la foration lors de travaux souterrains, en particulier dans les exploitations minières. Elle se rapporte en particulier à un dispositif de foration par rotopercussion, adapté pour une utilisation dans des galeries de mine de faible hauteur, en particulier pour foration de trous dans le "toit" de telles galeries. L'invention a aussi pour objet un procédé de foration par rotopercussion, mis en oeuvre par ce dispositif.The present invention relates to the field of drilling during underground work, particularly in mining. It relates in particular to a rotopercussion drilling device, adapted for use in low-rise mine galleries, in particular for drilling holes in the "roof" of such galleries. The invention also relates to a rotopercussion drilling method, implemented by this device.

Un dispositif de foration conventionnel, dit "hors de trou", utilisable à cet effet, comporte une perforatrice munie d'une barre de foration, la perforatrice étant déplacée verticalement le long d'une glissière et exerçant une action roto-percutante. Ce dispositif n'est cependant pas bien adapté à une utilisation dans des galeries de mine de faible hauteur, car la profondeur maximale de trou est limitée par la hauteur de galerie et la longueur de la perforatrice. Par exemple, dans une galerie de mine de 1,10 mètre de hauteur, et avec une perforatrice de 300 mm de longueur, la profondeur maximale de trou est d'environ 700 mm, compte tenu des jeux nécessaires à la manipulation des outillages - ici environ 100 mm pour manoeuvrer la barre de foration.A conventional drilling device, called "out of hole", used for this purpose, comprises a drill with a drill bar, the drill being moved vertically along a slide and exerting a roto-percussion action. This device, however, is not well suited for use in low-rise mine galleries, because the maximum hole depth is limited by the gallery height and the length of the drill. For example, in a 1.10-meter high mine gallery, and with a 300-mm-long drill, the maximum hole depth is about 700 mm, given the games needed to handle the tools - here about 100 mm to maneuver the drill bar.

Pour creuser des trous de longueur plus importante, une solution connue consiste à monter un train de tiges de foration sur la perforatrice, mais cette solution est lourde et contraignante car elle nécessite de réunir des tiges allonges successivement les unes aux autres, et de déconnecter et reconnecter la perforatrice au train de tiges, au fur et à mesure de l'approfondissement du trou en cours de foration.To dig holes of greater length, a known solution is to mount a drill string drill on the drill, but this solution is heavy and constraining because it requires to gather successive rods successively to each other, and disconnect and reconnect the drill to the drill string, as the drilling hole deepens.

Un autre dispositif connu dit "marteau fond de trou", décrit par exemple dans le brevet EP 0 733 152 B1 , est mieux adapté pour une utilisation dans des galeries de mine de faible hauteur. Il comporte un corps de perforatrice, de forme générale cylindrique, relié par un tubage à une pompe à eau sous haute pression située à distance, un piston de frappe étant monté mobile en translation dans le corps de perforatrice, et soumis à une haute pression pulsée d'eau de manière à être animé d'un mouvement de percussion contre une enclume porte-taillant, le tubage transmettant simultanément au corps de perforatrice un mouvement de rotation autour de son axe principal, qui permet de faire varier le point d'impact des boutons du taillant au cours de la foration.Another known device called "downhole hammer", described for example in the patent EP 0 733 152 B1 , is better suited for use in low-rise mine galleries. It comprises a drill body, of generally cylindrical shape, connected by a casing to a remote high pressure water pump, a striking piston being mounted movably in translation in the piercer body, and subjected to a high pulsating pressure of water so as to be driven in a percussion movement against a cutting anvil, the casing transmitting simultaneously to the drill body a rotational movement about its main axis, which allows to vary the point of impact of cutting buttons during drilling.

Dans ce brevet EP 0 733 152 B1 , la distribution alternative d'eau sous haute pression, qui provoque la percussion du piston de frappe, est toutefois réalisée par des moyens entièrement intégrés au corps de perforatrice, de sorte que la longueur et le diamètre du corps de perforatrice sont élevés. Le diamètre du corps de perforatrice empêche en particulier de forer en pratique des trous de diamètre inférieur à 45 mm, alors qu'il est parfois souhaitable de pouvoir forer des trous de petit diamètre, de l'ordre de 25 à 35 mm, pour poser par exemple des boulons de soutènement dans le toit d'une galerie de mine.In this patent EP 0 733 152 B1 , the alternative distribution of water under high pressure, which causes percussion of the striking piston, is however realized by means fully integrated into the drill body, so that the length and diameter of the drill body are high. The diameter of the drill body in particular prevents drilling in practice holes with a diameter of less than 45 mm, while it is sometimes desirable to drill holes of small diameter, of the order of 25 to 35 mm, to ask for example, retaining bolts in the roof of a mine gallery.

Le brevet US 4254638 A montre un dispositif de foration rotatif porté par un véhicule de faible hauteur et pouvant ainsi travailler dans une galerie de mine de faible hauteur. Dans ce document, la foration est réalisée par des moyens purement mécaniques, comprenant un arbre formé de courts tronçons successifs articulés entre eux et tournant à l'intérieur d'un tubage coudé. Ce dispositif de foration n'est pas de type rotopercutant, et il n'utilise pas l'énergie hydraulique.The patent US 4254638 A shows a rotary drilling device carried by a vehicle of low height and thus able to work in a mine gallery of low height. In this document, the drilling is performed by purely mechanical means, comprising a shaft formed of short successive sections articulated between them and rotating inside a bent casing. This drilling device is not rotopercutant type, and it does not use hydraulic energy.

Le document WO 95/04207 A décrit un dispositif de foration rotopercutant du genre « marteau fond de trou », qui peut être alimenté par une source de fluide sous pression créant des impulsions de pression. Le marteau comporte un piston monté mobile suivant l'axe de ce marteau, ce piston portant directement un taillant. Le guidage du piston est tel que son avance s'accompagne d'une rotation dudit piston, donc du taillant. Le marteau crée ainsi lui-même son mouvement de rotation.The document WO 95/04207 A discloses a rotopercutant drilling device of the type "downhole hammer", which can be fed by a source of fluid under pressure creating pressure pulses. The hammer comprises a piston mounted to move along the axis of this hammer, this piston directly carrying a cutter. The guide of the piston is such that its advance is accompanied by a rotation of said piston, so the cutting. The hammer thus creates its own rotational movement.

Enfin, le document GB 2126940 A divulgue un mécanisme de percussion actionné à distance par un dispositif de déplacement de fluide gazeux, créant des impulsions transmises à un piston monté axialement coulissant dans un corps de perforatrice, et venant frapper un outil de foration placé à l'avant du corps de perforatrice. Toutefois, cet outil n'est pas rotopercutant, la perforatrice ne créant pas de mouvement de rotation et le conduit de liaison qui alimente cette perforatrice ne transmettant aucun mouvement de rotation.Finally, the document GB 2126940 A discloses a percussion mechanism remotely actuated by a gaseous fluid displacement device, creating pulses transmitted to a piston mounted axially slidably in a drill body, and striking a drill tool placed in front of the drill body. However, this tool is not rotopercutant, the drill does not create a rotational movement and the connecting conduit that feeds this drill does not transmit any rotational movement.

La présente invention vise à surmonter ces inconvénients en fournissant un dispositif de foration rotopercutant permettant de forer des trous profonds et de petit diamètre, tout en demeurant adapté à une utilisation dans des galeries de mine de faible hauteur.The present invention aims to overcome these drawbacks by providing a rotopercutant drilling device for drilling deep holes and small diameter, while remaining suitable for use in low pit galleries.

A cet effet, l'invention a pour objet un dispositif de foration par rotopercussion, adapté pour une utilisation dans des galeries de mine de faible hauteur, le dispositif comportant un véhicule porteur de faible hauteur, une pompe à eau sous haute pression placée sur le véhicule porteur, un corps de perforatrice de forme générale cylindrique avec un axe principal, un tubage flexible reliant le corps de perforatrice à la pompe à eau située à distance, et une électrovanne intercalée, sur le véhicule porteur, entre la pompe à eau et le point de départ du tubage flexible, un piston de frappe étant monté mobile en translation et rappelé élastiquement dans le corps de perforatrice, et étant soumis à une haute pression pulsée d'eau de manière à être animé d'un mouvement de percussion contre une enclume porte-taillant, l'électrovanne recevant en fonctionnement des impulsions électriques successives pour commande d'ouverture et de fermeture, qui créent de ondes de choc sur la ligne d'eau contenue dans le tubage flexible, lequel transmet ces ondes de choc jusqu'au piston de frappe du corps de perforatrice, le tubage flexible transmettant simultanément au corps de perforatrice un mouvement de rotation autour de son axe principal.For this purpose, the subject of the invention is a rotopercussion drill device adapted for use in low-height mine galleries, the device comprising a low-height carrier vehicle, a high-pressure water pump placed on the carrier vehicle, a generally cylindrical perforator body with a main axis, a flexible casing connecting the piercer body to the remote water pump, and a solenoid valve interposed on the vehicle carrier, between the water pump and the starting point of the flexible casing, a striking piston being mounted movable in translation and resiliently biased into the perforator body, and being subjected to a high pulsating pressure of water so as to be animated a percussion movement against an anvil cutting-holder, the solenoid valve receiving in operation successive electric pulses for opening and closing control, which create shock waves on the water line contained in the flexible casing, which transmits these shock waves to the striking piston of the piercer body, the flexible casing simultaneously transmitting to the piercer body a movement of t rotation around its main axis.

Ainsi, l'idée à la base de l'invention consiste à déporter, à l'extérieur du trou à forer, sur un véhicule porteur de faible hauteur, des moyens de distribution pulsée d'eau sous haute pression, agissant sur le piston de frappe, ce qui permet de réduire la longueur et le diamètre du corps de perforatrice et ainsi de forer des trous profonds et de petit diamètre, sans être limité par la hauteur de la galerie de mine.Thus, the idea underlying the invention is to deport, outside the hole to be drilled, on a carrier vehicle of low height, pulsed distribution means of water under high pressure, acting on the piston of striking, which reduces the length and diameter of the drill body and thus drill deep holes and small diameter, without being limited by the height of the mine gallery.

Selon une possibilité, un accumulateur hydraulique est associé, sur le véhicule porteur, à la pompe à eau, afin d'écrêter les pics de pression engendrés par la pompe.According to one possibility, a hydraulic accumulator is associated, on the carrier vehicle, with the water pump, in order to clip the pressure peaks generated by the pump.

De manière avantageuse, des moyens de déplacement en avant et de guidage du tubage flexible sont prévus sur le véhicule porteur pour transmettre au corps de perforatrice un mouvement de poussée, la profondeur de trou foré étant sensiblement équivalente à la course d'entraînement du tubage flexible.Advantageously, means for moving forward and guiding the flexible casing are provided on the carrier vehicle to transmit to the drill body a thrust movement, the drilled hole depth being substantially equivalent to the driving stroke of the flexible casing .

Les moyens de déplacement en avant du tubage flexible comprennent, par exemple, une plateforme montée mobile en translation horizontale sur un châssis du véhicule porteur, dans le sens de la longueur de ce châssis, plateforme sur laquelle sont montés la pompe à eau, l'électrovanne et un générateur d'impulsions électriques couplé à l'électrovanne, la plateforme étant déplaçable en translation dans le sens de la longueur du châssis, par des moyens motorisés de commande. La profondeur maximale de trou foré n'est ici avantageusement limitée que par la longueur du tubage flexible, et par la course d'avance de la plateforme.The means of displacement in front of the flexible casing comprise, for example, a platform mounted in horizontal translation on a chassis of the carrier vehicle, in the direction of the length of this frame, platform on which the water pump is mounted, the solenoid valve and an electric pulse generator coupled to the solenoid valve, the platform being movable in translation in the direction of the length of the frame, by motorized control means. The maximum depth of the drilled hole is here advantageously limited only by the length of the flexible casing, and by the advance stroke of the platform.

Selon une autre possibilité, les moyens de déplacement en avant du tubage flexible comprennent un dérouleur, monté sur le véhicule porteur, sur lequel est enroulé le tubage flexible, un joint tournant reliant le point de départ de ce tubage flexible à la pompe à eau. Cette variante rend inutile toute partie mobile importante sur le véhicule porteur.According to another possibility, the means for moving forward of the flexible casing comprises a unwinder, mounted on the carrier vehicle, on which is wound the flexible casing, a rotary joint connecting the starting point of this flexible casing to the water pump. This variant makes unnecessary any significant moving part on the carrier vehicle.

Les moyens de guidage en translation du tubage flexible peuvent comporter une glissière ou un canal de déviation et de guidage en direction verticale, notamment en forme de coude, disposé(e) à l'avant du véhicule porteur.The means for guiding the flexible tubing in translation may comprise a slideway or a deflection and guide channel in the vertical direction, in particular in the shape of a bend, arranged at the front of the carrier vehicle.

Selon un autre aspect de l'invention, des moyens d'entraînement en rotation du tubage flexible sont prévus sur le véhicule porteur pour transmettre au corps de perforatrice un mouvement de rotation alternatif autour de son axe principal. Cette disposition permet de donner à l'enclume porte-taillant le mouvement de rotation nécessaire pour briser la roche, sans avoir à entraîner en rotation l'ensemble, volumineux, des éléments montés sur le véhicule porteur.According to another aspect of the invention, means for rotating the flexible casing are provided on the carrier vehicle to transmit to the drill body a reciprocating movement about its main axis. This arrangement makes it possible to give the cutter anvil the rotational movement necessary to break the rock, without having to drive in rotation the assembly, bulky, elements mounted on the carrier vehicle.

Le dispositif peut encore comprendre des moyens de support et de guidage du corps de perforation à l'amorçage d'un trou à forer, pour assurer alors le positionnement correct et le guidage vertical du corps de perforatrice.The device may further comprise means for supporting and guiding the piercing body at the initiation of a hole to be drilled so as to ensure the correct positioning and vertical guidance of the piercer body.

Le corps de perforatrice peut présenter des ouvertures, notamment des rainures, par lesquelles sont évacués l'eau et les débris de roches brisées lors de la foration, l'eau étant ici utilisée de façon avantageuse pour évacuer les débris de roches dégagés par la foration.The piercer body may have openings, in particular grooves, through which water and broken rock debris are removed during drilling, the water being used here advantageously to evacuate the debris from rocks released by drilling. .

Le choix de l'eau comme fluide de puissance permet également de maintenir le diamètre du corps de perforatrice à une valeur minimum car aucun conduit de récupération d'eau n'y est logé, l'eau étant, pour l'environnement, un fluide propre que l'on peut rejeter sans risque dans une galerie de mine.The choice of water as a power fluid also makes it possible to maintain the diameter of the drill body at a minimum value because no water recovery conduit is housed therein, the water being, for the environment, a fluid clean that can be safely discarded in a mine gallery.

L'invention a aussi pour objet un procédé de foration par rotopercussion, adapté pour une utilisation dans des galeries de mine de faible hauteur, avec mise en oeuvre d'un corps de perforatrice relié par un tubage flexible à une pompe à eau sous haute pression, un piston de frappe étant monté mobile en translation dans le corps de la perforatrice, et soumis à une haute pression pulsée d'eau, des ondes de choc étant générées dans l'eau à distance de la perforatrice, plus particulièrement à l'extérieur du trou en cours de foration, et étant transmises jusqu'au piston de frappe du corps de perforatrice par la ligne d'eau contenue dans le tubage flexible, l'eau libérée au niveau du corps de perforatrice étant utilisée pour évacuer les débris de roches dégagés lors de la foration.The invention also relates to a rotopercussion drilling method, adapted for use in low-height mine galleries, with the use of a perforator body connected by flexible tubing to a high-pressure water pump. , a striking piston being movably mounted in translation in the body of the perforator, and subjected to a high pulsating pressure of water, shock waves being generated in the water at a distance from the perforator, more particularly outside the current hole of drilling, and being transmitted to the punching piston of the piercer body by the water line contained in the flexible casing, the water released at the piercer body being used to evacuate the debris of rocks released during the boring.

L'invention sera mieux comprise à l'aide de la description qui suit, en référence au dessin schématique annexé représentant, à titre d'exemple, une forme d'exécution de ce dispositif de foration, et illustrant ce procédé de foration :

  • Figure 1 est une vue de côté, dans une galerie de mine, d'un dispositif de foration conforme à la présente invention, en début de foration d'un trou ;
  • Figure 2 est une vue similaire à la figure 1 en fin de foration du trou ;
  • Figure 3 est une vue en coupe longitudinale du corps de perforatrice.
The invention will be better understood with the aid of the description which follows, with reference to the attached schematic drawing showing, by way of example, an embodiment of this drilling device, and illustrating this drilling method:
  • Figure 1 is a side view, in a mine gallery, of a drilling device according to the present invention, at the beginning of drilling a hole;
  • Figure 2 is a view similar to the figure 1 at the end of drilling the hole;
  • Figure 3 is a longitudinal sectional view of the piercer body.

Comme l'indiquent les figures 1 et 2, un véhicule porteur 1 assure le déplacement du dispositif de foration selon l'invention dans une galerie de mine G de faible hauteur H comprise entre 1,0 et 1,5 mètre, par exemple 1,1 mètre. Le véhicule porteur 1 comporte un châssis monobloc rigide 2, de forme générale parallélépipédique, situé à une hauteur relativement faible au-dessus du sol sur lequel le véhicule porteur 1 se déplace par quatre roues motrices, soit deux roues arrière 3 et deux roues avant 4. Sur la face supérieure du châssis 2 est montée une plateforme mobile 5, déplaçable en translation dans le sens de la longueur du châssis 2 sur une course C, par des moyens motorisés de commande, non représentés, par exemple un moteur porté par le châssis 2 et une transmission à chaîne sans fin.As indicated by figures 1 and 2 , a carrier vehicle 1 ensures the displacement of the drilling device according to the invention in a mine gallery G of low height H between 1.0 and 1.5 meters, for example 1.1 meters. The carrier vehicle 1 comprises a rigid monobloc frame 2, of parallelepipedal general shape, located at a relatively low height above the ground on which the carrier vehicle 1 moves by four driving wheels, two rear wheels 3 and two front wheels 4 On the upper face of the frame 2 is mounted a mobile platform 5, displaceable in the direction of the length of the frame 2 on a stroke C, by motorized control means, not shown, for example a motor carried by the frame 2 and an endless chain transmission.

Un corps de perforatrice 8, de forme générale cylindrique d'axe principal A, et de longueur en L, est placé en cours d'utilisation au niveau du trou à forer, et relié par un tubage flexible 7 à une pompe à eau 11 sous haute pression, environ 150 bars, montée sur la plateforme mobile 5 et reliée, à l'arrière du véhicule 1, à une alimentation en eau 6. La pompe à eau 11 peut comporter un limiteur de pression intégré.A perforator body 8, of generally cylindrical shape with a main axis A, and length L, is placed in use at the level of hole to drill, and connected by a flexible casing 7 to a water pump 11 under high pressure, about 150 bars, mounted on the mobile platform 5 and connected to the rear of the vehicle 1, a water supply 6. The water pump 11 may comprise an integrated pressure limiter.

Un piston de frappe 15 est monté mobile, rappelé élastiquement par un ressort de rappel 16, dans le corps de perforatrice 8 (voir figure 3), et soumis à une haute pression pulsée d'eau de manière à être animé d'un mouvement de percussion contre une enclume porte-taillant 17, par les moyens détaillés ci-après. Le corps de perforatrice 8 comporte, à l'arrière, un raccord 19 pour sa liaison au tubage flexible 7.A striking piston 15 is movably mounted, resiliently biased by a return spring 16, into the piercer body 8 (see FIG. figure 3 ), and subjected to a high pulsating pressure of water so as to be driven in a percussion movement against an anvil cutting holder 17, by the means detailed below. The perforator body 8 comprises, at the rear, a coupling 19 for its connection to the flexible casing 7.

Une électrovanne 13 est intercalée, sur la plateforme mobile 5, entre la pompe à eau 11 et le point de départ du tubage flexible 7. L'électrovanne 13 est couplée à un générateur d'impulsions électriques 12 dont la fréquence peut être comprise entre 30 et 70 Hz. Un accumulateur hydraulique 14, également monté sur la plateforme mobile 5, permet l'écrêtage des pics de pression liés à la pompe à eau 11.A solenoid valve 13 is interposed, on the mobile platform 5, between the water pump 11 and the starting point of the flexible casing 7. The solenoid valve 13 is coupled to an electric pulse generator 12 whose frequency may be between and 70 Hz. A hydraulic accumulator 14, also mounted on the mobile platform 5, allows clipping of the pressure peaks related to the water pump 11.

Des moyens d'entraînement en rotation du tubage flexible 7, notamment des galets 10, sont prévus sur la plateforme mobile 5. Une glissière de guidage 9, en forme de coude, est disposée à l'avant du véhicule porteur 1 afin de dévier et guider en translation, en direction verticale, le tubage flexible 7.Rotating drive means of the flexible casing 7, in particular rollers 10, are provided on the mobile platform 5. A guide rail 9, in the form of a bend, is arranged at the front of the carrier vehicle 1 in order to deflect and guide in translation, in vertical direction, the flexible casing 7.

La foration est assurée par les différents mouvements, décrits ci-après, de percussion, poussée et rotation.The drilling is ensured by the different movements, described below, percussion, thrust and rotation.

L'électrovanne 13 reçoit, de la part du générateur d'impulsions 12, des impulsions électriques 1 successives pour commander alternativement son ouverture et sa fermeture, qui créent des ondes de choc sur la ligne d'eau contenue dans le tubage flexible 7. Le tubage flexible 7 transmet ces ondes de choc jusqu'au piston de frappe 15 monté dans le corps de perforatrice 8.The solenoid valve 13 receives, from the pulse generator 12, successive electrical pulses 1 to alternately control its opening and closing, which create shock waves on the water line contained in the flexible casing 7. The flexible casing 7 transmits these shock waves to the striking piston 15 mounted in the piercer body 8.

Soumis à cette haute pression pulsée et rappelé élastiquement par son ressort de rappel 16, le piston de frappe 15 est animé d'un mouvement de percussion contre l'enclume porte-taillant 17 du corps de perforatrice 8.Subject to this high pulsating pressure and resiliently biased by its return spring 16, the striking piston 15 is driven in a percussion movement against the cutting anvil 17 of the piercer body 8.

Les galets 10 entraînent le tubage flexible 7 en rotation de manière à ce qu'il transmette simultanément à l'enclume porte-taillant 17 un mouvement de rotation alternatif R autour de l'axe principal A du corps de perforatrice 8. Ce mouvement de va-et-vient rotatif est avantageux par rapport à un mouvement de rotation unidirectionnel, car il permet de briser la roche sans avoir à entraîner en rotation l'ensemble volumineux des éléments montés sur le véhicule porteur 1.The rollers 10 drive the flexible tubing 7 in rotation so that it simultaneously transmits to the cutting bit anvil 17 an alternating rotational movement R about the main axis A of the perforator body 8. This movement of rotation is advantageous compared to a unidirectional rotation movement, because it allows to break the rock without having to rotate the large assembly of the elements mounted on the carrier vehicle 1.

Simultanément, la plateforme mobile 5 est déplacée en translation longitudinalement sur le châssis 2, au fur et à mesure de la foration, d'une position initiale, qui correspond à un début de foration (voir figure 1), à une position de fin de course dans laquelle est atteinte la profondeur P souhaitée du trou foré T (voir figure 2). La profondeur P du trou foré T est équivalente à la course d'entraînement du tubage flexible 7, laquelle n'est avantageusement limitée que par la longueur totale du tubage flexible 7, augmentée de la longueur L du corps de perforatrice 8, et par la course de translation C de la plateforme mobile 5.Simultaneously, the mobile platform 5 is moved in translation longitudinally on the frame 2, as and when the drilling, an initial position, which corresponds to a beginning of drilling (see figure 1 ) at an end position in which the desired depth P of the drilled hole T is reached (see figure 2 ). The depth P of the drilled hole T is equivalent to the driving stroke of the flexible casing 7, which is advantageously limited only by the total length of the flexible casing 7, increased by the length L of the piercer body 8, and by the translation travel C of the mobile platform 5.

Durant sa course, la plateforme 5 fait avancer progressivement le tubage flexible 7 dans la glissière de déviation et de guidage vertical 9. Le tubage flexible 7 transmet ce mouvement de poussée au corps de perforatrice 8, ce qui permet à celle-ci de forer plus profondément dans la roche, jusqu'à atteindre la profondeur maximale P de trou, ici par exemple 1,50 mètre. Il est bien entendu possible d'atteindre de moindres profondeurs, en réduisant la course C de la plateforme 5. On notera qu'à l'amorçage du trou à forer T, on fait avantageusement intervenir un organe 18 de support et de guidage du corps de perforatrice 8 (voir figure 1), de manière à positionner convenablement ce corps de perforatrice 8 et à assurer son guidage initial rectiligne, avant qu'il ne se guide de lui-même dans la portion de trou déjà forée.During its run, the platform 5 progressively advances the flexible casing 7 in the deflection guide and vertical guide 9. The flexible casing 7 transmits this thrust movement to the body of the perforator 8, which allows it to drill more deep in the rock, until reaching the maximum depth P of hole, here for example 1.50 meters. It is of course possible to reach lower depths, by reducing the stroke C of the platform 5. It will be noted that, when priming the hole to be drilled, it is advantageous to use an organ 18 for supporting and guiding the body. of perforator 8 (see figure 1 ), so as to properly position the body of perforator 8 and ensure its initial rectilinear guidance, before it guides itself in the hole portion already drilled.

Grâce à un orifice central 20 de sortie d'eau, ménagé dans l'enclume porte-taillant 17, les débris de roches brisées lors de la foration sont évacués avec l'eau, éventuellement par des ouvertures, par exemple des rainures (non représentées), ménagées dans le corps de perforatrice 8.Through a central outlet 20 of water outlet, formed in the anvil cutting holder 17, the broken rock debris during drilling is discharged with water, possibly through openings, for example grooves (not shown). ), formed in the body of perforator 8.

L'on ne s'éloignerait pas du cadre de l'invention, telle que définie dans les revendications annexées, en modifiant des détails constructifs du corps de perforatrice, ou en ayant recours à tous moyens équivalents, notamment en remplaçant le système d'avance à plateforme mobile, monté sur le véhicule porteur, par un système équivalent de déroulage du tubage flexible, avec un dérouleur monté sur le véhicule porteur et pourvu d'un joint tournant reliant le point de départ du tubage flexible à la pompe à eau.One would not depart from the scope of the invention, as defined in the appended claims, by modifying the constructive details of the piercer body, or by using any equivalent means, in particular by replacing the advance system. with a mobile platform, mounted on the carrier vehicle, by an equivalent unwinding system of the flexible casing, with an unwinder mounted on the carrier vehicle and provided with a rotating joint connecting the starting point of the flexible casing to the water pump.

Claims (9)

  1. Rotary-percussive drilling device, suitable for use in low-height mine galleries, the device comprising a low -height carrying vehicle (1), a high -pressure water pump (11) placed on the carrying vehicle (1), a perforating body (8) of gener ally cylindrical shape with a main axis (A), a flexible tubing (7) connecting the perforating body (8) to the water pump (11) situated at a distance, and a solenoid valve (13) interposed, on the carrying vehicle (1), between the water pump (11) and the poi nt of departure of the flexible tubing (7), a percussion piston (15) being mounted so as to be movable in translation and returned elastically (16) into the perforating body (8) and being subjected to a high-pressure water pulse so as to be driven in a percussive movement against a bit-holder anvil (17), the solenoid valve (13) in operation receiving successive electrical pulses (I) for opening and closing command, which create shockwaves on the waterline contained in the flexible tubing (7), which transmits these shockwaves to the percussion piston (15) of the perforating body (8), the flexible tubing (7) simultaneously transmitting to the perforating body (8) a rotary movement about its main axis (A).
  2. Drilling device according to Claim 1, characterized in that a hydraulic accumulator (14) is associated, on the carrying vehicle (1), with the water pump (11).
  3. Drilling device according to Claim 1 or 2, characterized in that means of forward movement (5) and of translation guidance (9) of the flexible t ubing (7) are provided on the carrying vehicle (1) in order to transmit to the perforating body (8) a thrusting movement, the depth (P) of hole drilled being substantially equivalent to the drive travel (C) of the flexible tubing (7).
  4. Drilling device a ccording to Claim 3, characterized in that the means of forward movement of the flexible tubing (7) comprise a platform (5) mounted so as to be movable in horizontal translation on a chassis (2) of the carrying vehicle (1) in the lengthwise direction of this chassis (2), a platform on which are mounted the water pump (11) and an electric pulse generator (12) coupled to the solenoid valve (13), the platform (5) being able to be moved in translation in the lengthwise direction of the chassis (2), by motorized control means.
  5. Drilling device according to Claim 3, characterized in that the means for forward movement of the flexible tubing (7) comprise an unroller, mounted on the carrying vehicle (1), on which the flexible tubing (7) is rolled up, a rotating seal connecting the point of departure of this flexible tubing (7) to the water pump (11).
  6. Drilling device according to one of Claims 3 to 5, characterized in that the means for guidance in translation of the flexible tubing (7) comprise a slider or a channel (9) for redirection and guidance in the vertical direction, particularly elbow -shaped, placed at the front of the carrying vehicle (1).
  7. Drilling device according to one of Claims 1 to 6, characterized in that means (10) for rotating the flexible tubing (7) are provided on the carrying vehicle (1) in order to transmit to the perforating body (8) an alternating movement of rotation (R) about its main axis (A).
  8. Drilling device according to one of Claims 1 to 7, characterized in that it comprises means (18) for supporting and guiding the perforating body (8), at the beginning of a hole to be drilled.
  9. Rotary-percussive drilling method, suitable for use in low-height mine galleries (G), with the use of a perforating body (8) connected by a flexible tubing (7), capable of transmitting to the perforating body (8) a movement of rotation about its main axis (A), to a high-pressure water pump (11), a percussion piston (15) being mounted so as to be movable in translation in the perforating body (8), a nd subjected to a high - pressure water pulse, shockwaves being generated in the water at a distance from the perforating body (8), more particularly outside the hole (T) being drilled, and being transmitted to the percussion piston (15) of the perforating body (8) by the waterline contained in the flexible tubing (7), the water released at the perforating body (8) being used to clear away the rock debris removed by the drilling.
EP06356035A 2006-03-30 2006-03-30 Rotary percussion drilling device and method Not-in-force EP1840322B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE602006003187T DE602006003187D1 (en) 2006-03-30 2006-03-30 Rotary hammer drill and procedure
PL06356035T PL1840322T3 (en) 2006-03-30 2006-03-30 Rotary percussion drilling device and method
EP06356035A EP1840322B1 (en) 2006-03-30 2006-03-30 Rotary percussion drilling device and method
AT06356035T ATE411446T1 (en) 2006-03-30 2006-03-30 ROTARY DRILLING APPARATUS AND METHOD

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06356035A EP1840322B1 (en) 2006-03-30 2006-03-30 Rotary percussion drilling device and method

Publications (2)

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EP1840322A1 EP1840322A1 (en) 2007-10-03
EP1840322B1 true EP1840322B1 (en) 2008-10-15

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EP06356035A Not-in-force EP1840322B1 (en) 2006-03-30 2006-03-30 Rotary percussion drilling device and method

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EP (1) EP1840322B1 (en)
AT (1) ATE411446T1 (en)
DE (1) DE602006003187D1 (en)
PL (1) PL1840322T3 (en)

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CN108593454B (en) * 2018-07-13 2024-01-09 湖南科技大学 Device and method for testing mud burst of filling pressure-bearing karst cave under impact disturbance

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB952403A (en) * 1962-01-23 1964-03-18 Sonomotive Engineers Ltd Improvements in or relating to fluctuating pressure sonic power systems
US3460636A (en) * 1967-07-05 1969-08-12 Sonomotive Eng Ltd Percussive tools and machines
US4254638A (en) * 1978-10-04 1981-03-10 The Bendix Corporation Positive release means for articulated flexible shaft
GB2126940B (en) * 1982-09-04 1986-02-26 Inst Gornogo Dela Sibirskogo O Percussive tool
US5467684A (en) * 1992-03-25 1995-11-21 Sher; Arieh Rotary piston driving mechanism

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EP1840322A1 (en) 2007-10-03
DE602006003187D1 (en) 2008-11-27
PL1840322T3 (en) 2009-02-27
ATE411446T1 (en) 2008-10-15

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