WO1998007959A1 - Procede et dispositif permettant de concasser un materiau par decharges d'energie electrique pulsee, procede et dispositif permettant de generer des impulsions a haute tension - Google Patents

Procede et dispositif permettant de concasser un materiau par decharges d'energie electrique pulsee, procede et dispositif permettant de generer des impulsions a haute tension Download PDF

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Publication number
WO1998007959A1
WO1998007959A1 PCT/JP1997/002888 JP9702888W WO9807959A1 WO 1998007959 A1 WO1998007959 A1 WO 1998007959A1 JP 9702888 W JP9702888 W JP 9702888W WO 9807959 A1 WO9807959 A1 WO 9807959A1
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WO
WIPO (PCT)
Prior art keywords
crushing
electrode
capacitor
substance
voltage
Prior art date
Application number
PCT/JP1997/002888
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English (en)
Japanese (ja)
Inventor
Tadayuki Hanamoto
Kazuyuki Sajiki
Koichiro Itow
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Komatsu Ltd.
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 Komatsu Ltd. filed Critical Komatsu Ltd.
Publication of WO1998007959A1 publication Critical patent/WO1998007959A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C37/00—Other methods or devices for dislodging with or without loading
    • E21C37/18—Other methods or devices for dislodging with or without loading by electricity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C19/00—Other disintegrating devices or methods
    • B02C19/18—Use of auxiliary physical effects, e.g. ultrasonics, irradiation, for disintegrating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C19/00—Other disintegrating devices or methods
    • B02C19/18—Use of auxiliary physical effects, e.g. ultrasonics, irradiation, for disintegrating
    • B02C2019/183—Crushing by discharge of high electrical energy

Definitions

  • the present invention relates to a method for crushing a substance such as a bedrock or a concrete by discharge of pulsed electric energy.
  • a solid insulator such as a rock is drilled with a drill or the like, and a viscous electrolytic solution (eg, copper sulfate electrolytic solution) is placed in the hole.
  • a coaxial electrode is inserted into this hole, and a high-voltage pulse is applied to this electrode.
  • a plasma discharge is generated at the electrode, and the electrical energy radiated at this time crushes the rocks and fragments them.
  • the inside of the confined area around the electrode is filled with the above-mentioned electrolytic solution so as to increase the destructive force generated by the plasma discharge.
  • the rising time of the high voltage pulse is reduced to a predetermined value or less, so that the discharge current easily flows in the electrolyte.
  • Japanese Patent Publication No. Sho 62-5202733 discloses that two or more different holes are made at a predetermined distance in a substance such as rock, an electrode is inserted into each hole, and a different hole is formed. Rocks are crushed by plasma discharge between the electrodes. At this time, high-voltage energy is applied to the rock in a very short time in the form of a pulse, which causes crushing.
  • Japanese Patent Publication No. Sho 62-5202733 states that the rising time of the applied high-voltage pulse must be within a predetermined time in order to efficiently perform the electrofracture.
  • the rise time of the high-voltage pulse is shortened to make the rocks and the like easily crushed, and the amount of electric energy input to the rocks and the like is increased in order to crush a large amount in a wide range. Need to be done.
  • the present invention has been made in view of such conventional problems, and has excellent workability of drilling and crushing a preliminary hole at the time of electric crushing, and crushing a substance by pulsed electric energy discharge capable of efficiently performing the electrocrushing. It is an object of the present invention to provide a method, a crushing device, a high-voltage pulse generating method, and a high-voltage pulse generating device.
  • an electrode is inserted into a preliminary hole provided in a substance to be crushed, the periphery of the electrode is filled with a solution, and a high-voltage pulse is applied to the electrode.
  • a preliminary hole is formed in the substance by passing a discharge current through the electrode for preliminary hole drilling. Thereafter, the electrode for crushing is inserted into the preliminary hole, and a discharge current is passed through the electrode for crushing to crush the substance.
  • a second invention is the crushing method according to the first invention, wherein a discharge current flows through the substance during the preliminary hole excavation, and a discharge current flows through the solution during the crushing. This allows a discharge current to flow through the material to be crushed during pre-drilling, so that this material is efficiently and deeply drilled. Also, when crushing, discharge Since the current flows, a shock wave is generated, and this shock wave crushes the material to be crushed in a wide range. As a result, it is possible to efficiently perform electrofracture by pulsed electric energy discharge.
  • a discharge current is increased in the substance or the solution by changing a rising time of the high voltage pulse between the preliminary hole excavation and the crushing.
  • the characteristic that the breakdown voltage of the substance to be crushed and the withstand voltage of the solution are exchanged according to the rise time of the high-voltage pulse is used.By changing the rise time, the discharge current is reduced in the crushed substance. Or flowing in a solution. Therefore, when a preliminary hole is drilled, a discharge current flows through the material to be crushed, and this material is efficiently and deeply drilled. In addition, during crushing, a discharge current flows through the solution around the electrode, and the shock wave crushes the material to be crushed over a wide area. As a result, electric crushing can be performed efficiently.
  • the tip of the electrode in the crushing method of the first invention, is brought into contact with the substance at the time of digging the preliminary hole, and a discharge current flows through the substance. Discharge current is flowing through the solution away from the substance. In this way, when the tip of the electrode is brought into contact with the material to be crushed, a discharge current flows through this material, so that deep drilling can be performed when drilling a preliminary hole.
  • a shock current is generated by causing a discharge current to flow through the solution while separating the tip of the electrode from the substance to be crushed, and the substance to be crushed is widely crushed by the shock wave. As a result, electrocrushing can be performed efficiently.
  • At least two or more of the electrodes are used to drill at least two of the preliminary holes (4) at the time of digging the preliminary holes, and at least two of these The electrodes are inserted into the above-mentioned spare holes, and a high-voltage pulse is applied between these different electrodes.
  • At least two or more electrodes are used to make preliminary holes at the same time, and by discharging between different electrodes inserted into these different preliminary holes, the gap between the preliminary holes and the surrounding area is discharged. Can be crushed extensively.
  • the sixth invention of the apparatus for crushing a substance by pulsed electric energy discharge comprises: an electrode inserted into a preliminary hole formed in a substance to be crushed; a solution filling the periphery of the electrode; A pulse generator for applying a voltage pulse, wherein the substance is crushed by a discharge current at the electrode.
  • An apparatus for crushing a substance by a Luz electrician energy discharge comprising: the electrode for preliminary hole drilling; and the electrode for crushing.
  • a seventh aspect of the present invention is the crushing apparatus of the sixth aspect, further comprising a pulse generator for excavating a preliminary hole and outputting a frame that outputs the high-voltage pulse having a different rising time.
  • a pulse generator for excavating a preliminary hole and outputting a frame that outputs the high-voltage pulse having a different rising time.
  • the electrode and the pulse generator for preliminary hole drilling and crushing are shared during the preliminary hole drilling and crushing, respectively. Since the electrode for drilling and crushing and the pulse generator are shared during preliminary drilling and crushing, more efficient crushing can be performed. In this case, it is possible to switch the output waveform of the pulse generator between for preliminary hole drilling and crushing.
  • a ninth invention is the crushing device according to the sixth invention, wherein at least two or more of the electrodes for preliminary excavation for simultaneously drilling at least two or more of the preliminary holes; At least two crushing electrodes that are inserted into different preliminary holes and between which the high-voltage pulse is applied, between the electrodes inserted into the two or more different preliminary holes.
  • the substance is crushed by passing a discharge current through it.
  • a preliminary hole is formed simultaneously with at least two or more electrodes, and discharge is performed between different crushing electrodes inserted into the different preliminary holes, so that a wide range can be crushed between the preliminary holes and the periphery thereof.
  • a tenth invention of the high-voltage pulse generation method is a method of applying a high-voltage pulse to an electrode, and crushing or crushing a substance to be crushed by a discharge current at the electrode.
  • energy is stored in at least two capacitors having different capacitances at different terminal voltage values, respectively, and the energy of the condenser on the side where the high voltage is stored is insulated from a substance. After the electrode is discharged at the early stage of the discharge at the time of destruction, the energy of the capacitor stored at a lower voltage than the electrode is continuously discharged.
  • the eleventh invention of the high-voltage pulse generator according to the present invention is directed to a method for crushing a substance by pulsed electric energy discharge in which a high-voltage pulse is applied to an electrode, and a substance to be crushed is excavated or crushed by a discharge current at the electrode.
  • High voltage pulse generator of the above two DC power supplies having different output voltage values, a first capacitor in which energy is stored from a high voltage power supply of the two DC power supplies, and a lower voltage.
  • a second capacitor having energy stored therein from the power supply and having a capacity greater than the capacity of the first capacitor; and at least two or more capacitors discharging the energy stored in the first or second capacitor at the electrode.
  • a trigger switch circuit is provided to a method for crushing a substance by pulsed electric energy discharge in which a high-voltage pulse is applied to an electrode, and a substance to be crushed is excavated or crushed by a discharge current at the electrode.
  • the first capacitor stores energy from the high voltage power supply
  • the second capacitor which has a larger capacitance than the first capacitor, stores energy from the lower voltage power supply.
  • the second invention of the high-voltage pulse generator according to the present invention is that a high-voltage pulse is applied to an electrode, and a substance is crushed by pulse electric energy discharge in which a substance to be crushed is excavated or crushed by a discharge current at the electrode.
  • a high-voltage pulse generator comprising: two DC power supplies having different output voltage values; a means for directly discharging the energy of a low-voltage power supply of the two DC power supplies from the electrode; and a higher-voltage power supply.
  • the higher the voltage the more energy is stored in the capacitor from the DC power supply.
  • the energy of this capacitor is discharged via the trigger switch circuit, so that the discharge becomes easy.
  • the energy of the DC power source with the lower voltage is discharged through means (for example, a resistor) that directly discharges from the electrode, so that large energy required for crushing can be input. Therefore, it is possible to perform electro-fracture efficiently.
  • FIG. 1 shows a configuration diagram of a crusher of a first embodiment according to the present invention.
  • FIG. 2 is an explanatory view of the operation of the crushing apparatus according to the first embodiment during excavation of a preliminary hole.
  • FIG. 3 is an operation explanatory view at the time of crushing according to the crushing device of the first embodiment.
  • FIG. 4 shows a circuit configuration diagram of the pulse generator of the second embodiment.
  • FIG. 5 is an example of an output voltage waveform diagram of the pulse generator of FIG.
  • FIG. 6 is another example of the output voltage waveform diagram of the pulse generator of FIG.
  • FIG. 7 is a chart showing the relationship between the rise time of the pulse voltage and the withstand voltage of various insulators according to the present invention.
  • FIG. 8 shows a circuit configuration diagram of the pulse generator of the third embodiment.
  • FIG. 9 is an output voltage waveform diagram of the pulse generator of FIG.
  • FIG. 10 is an explanatory diagram of an example of how to use the electrodes in the third embodiment.
  • FIG. 11 is an explanatory diagram of an example of how to use another electrode in the third embodiment.
  • FIG. 12 is a circuit configuration diagram of a pulse generator according to a fourth embodiment of the present invention.
  • FIG. 13 is an output voltage waveform diagram of the pulse generator of FIG.
  • FIG. 14 is an explanatory diagram of an example of how to use the electrodes in the fifth embodiment.
  • FIG. 15 is an explanatory diagram of an example of how to use another electrode in the fifth embodiment.
  • the electrode 1 is an electrode used for both pre-hole drilling and main crushing, and is connected to the pulse generator 10.
  • the pulse generator 10 outputs a high-voltage pulse having a predetermined output waveform.
  • the electrode 1 includes a cylindrical negative electrode 3 and a positive electrode 2 provided along the central axis of the negative electrode 3, and the positive electrode 2 and the negative electrode 3 are insulated by an insulator.
  • the inside of the negative electrode 3 may be in a hollow state or may be filled with an insulator.
  • the positive electrode 2 and the negative electrode 3 are connected to a pulse generator 10 respectively.
  • the periphery of the front end of the electrode 1 is surrounded by a solution 9 having a predetermined insulation resistance.
  • FIG. 2 and FIG. 3 are explanatory diagrams of the operation of the present embodiment, and show the case of digging a preliminary hole and the case of crushing, respectively.
  • a high voltage pulse is applied by bringing the tip of the electrode 1 into contact with the surface of rock or the like.
  • the discharge current flowing between the positive electrode 2 and the negative electrode 3 flows in the rock, it is possible to reliably excavate a hole in the rock. Since this discharge current flows only in the vicinity of electrode 1, the drilled hole is Is a hole having substantially the same shape as the outer shape of. Therefore, this hole can be used as the spare hole 4.
  • FIG. 2 and FIG. 3 are explanatory diagrams of the operation of the present embodiment, and show the case of digging a preliminary hole and the case of crushing, respectively.
  • the tip of the electrode 1 is separated from the bottom surface of the preliminary hole 4, and discharge is performed in the solution 9 filled in the preliminary hole 4.
  • a shock wave is generated by the discharge current flowing through the solution 9, and the shock wave propagates through the solution 9 and spreads in the lateral direction of the preliminary hole 4. Crushed. Therefore, crushing can be performed efficiently.
  • the power supply 11 outputs a predetermined DC high voltage at a predetermined repetition frequency as shown in FIG. 4, and this output is applied to the capacitor 13 via the resistor 12.
  • the terminal voltage of the capacitor 13 is applied to the capacitor 15 via the trigger switch circuit 14.
  • the trig switch circuit 14 is composed of, for example, a switch for high voltage and high current such as a shunt tube, and an inductance (coil).
  • the terminal voltage of the capacitor 15 is applied to the capacitor 17 via the magnetic switch 16, and the terminal voltage of the capacitor 17 is applied to the capacitor 19 via the magnetic switch 18.
  • the magnetic switch 16, the capacitor 17, the magnetic switch 18, and the capacitor 19 constitute a pulse compression circuit, and the rising time of the rising of the input pulse voltage is shortened, and the pulse is sharpened. It changes the voltage.
  • An output switching switch 20 is provided on the output side of the pulse compression circuit, and a common terminal of the output switching switch 20 is connected to the positive electrode 2 of the electrode 1.
  • One of the two output terminals of the output switching switch 20 is connected to the output of the capacitor 15, and the other output terminal is connected to the output of the capacitor 19. Then, the output switching switch 20 selects the terminal voltage of the capacitor 15 and the terminal voltage of the capacitor 19, and applies them to the positive electrode 2 of the electrode 1.
  • the other end of each capacitor 13, 15, 17, 19, and the negative electrode 3 of electrode 1 are Each is connected to the negative terminal of the power supply 11.
  • the magnetic switches 16 and 18 are capable of magnetically switching the current, and are usually in an unsaturated state while the current value flowing through the magnetic switches 16 and 18 is small. Evening is getting very big. Also, when the value of the current flowing through the magnetic switches 16 and 18 becomes larger than a predetermined value, it becomes saturated and the inductance becomes very small.
  • a pulse voltage waveform having a short rise time can be obtained as follows.
  • the power supply 11 accumulates electric charge at a predetermined voltage in the capacitor 13 via the resistor 12 during a predetermined time (repetition cycle time).
  • the switch of the trigger switch circuit 14 switches to ⁇ N, and the electric charge stored in the capacitor 13 is transferred to the capacitor 15 via the trigger switch circuit 14.
  • the transfer of the charge is Complete.
  • the magnitude of the unsaturated inductance of the magnetic switch 16 is large, and during the above-mentioned half cycle, it is set to be larger than the inductance of the coil in the trigger switch circuit 14, so that the capacitor i3 Almost all the charge is transferred to the capacitor 15.
  • the terminal voltage of the capacitor 15 reaches the peak value.
  • the value of the current flowing through the magnetic switch 16 increases and reaches a saturation state. Since the magnitude of the inductance of the magnetic switch 16 in the saturated state is set to be much smaller than the inductance of the coil in the trigger switch circuit 14, the charge of the capacitor 15 is generated in the next half cycle. Does not return to the capacitor 13 but goes to the capacitor 17 via the magnetic switch 16.
  • the transfer of the charge is completed during a half cycle of the oscillation cycle time of the LC oscillation circuit constituted by the saturation inductance of the magnetic switch 16 and the capacitors 15 and 17.
  • the magnitude of the unsaturated inductance of the magnetic switch 18 is large, and is larger than the saturation inductance of the magnetic switch 16 during the above half period. Therefore, almost all the charge of the capacitor 15 is transferred to the capacitor 17.
  • the terminal voltage of the capacitor 17 reaches the peak value.
  • the magnitude of the saturation inductance of the magnetic switch ⁇ 8 is set to be much smaller than the saturation inductance of the magnetic switch 16.
  • the charge does not return to the capacitor 15 but passes to the capacitor 19 via the magnetic switch 18.
  • the transfer of the electric charge is completed during a half cycle of the oscillation cycle time of the LC oscillation circuit constituted by the saturation inductance of the magnetic switch 18 and the capacitors 17 and 19.
  • the half cycle time when the charge of the capacitor 13 sequentially transfers to the next stage capacitors 15, 17, and 19 is Go short. Therefore, the rise time of the voltage when the charge is stored in the capacitor 19 is shorter than the rise time of the voltage when the charge is stored in the capacitor 15.
  • FIGS. 5 and 6 show the voltage waveforms of the capacitors 15 and 19 at this time. In this way, the rise of the pulse voltage can be made faster by the Panorless compression circuit.
  • the output switching switch 20 switches between the voltage of the capacitor 15 and the voltage of the capacitor 19 to select the rise time of the pulse voltage applied to the electrode 1. Further, by switching the rise time of the pulse voltage, it is possible to select whether to discharge in the solution 9 or in the rock for the following reasons. This means that the same electrode 1 can be used to dig a preliminary hole 4 or to perform the main crushing, as in the first embodiment.
  • Figure 7 shows the general relationship between the rise time of the applied pulse voltage and the dielectric strength of each insulator when this pulse voltage is applied.
  • the horizontal axis represents the rise time of the applied pulse voltage (generally, the time required for the pulse voltage to rise from 10% to 90% of the maximum value)
  • the vertical axis represents the withstand voltage
  • It is expressed in semilogarithms with the logarithmic scale on the horizontal axis.
  • curves 41, 42, and 43 represent water, marble, Represents the characteristics of sandstone.
  • the withstand voltage of rock such as marble or sandstone is smaller than that of water when the rise time of the pulse voltage is short.
  • the discharge current flows more easily in the rock than in the solution (water), so that it is suitable for drilling the preliminary hole 4 in the rock or crushing the rock deeply.
  • rocks such as marble and sandstone have a higher withstand voltage than water. Therefore, in this case, the discharge current flows more easily in the solution (water) than in the rock, and is suitable for crushing over a wide area by the shock wave of the solution.
  • a single pulse generator 10 is provided with several circuits capable of generating pulse waveforms having different rise times, and by switching this output circuit, a high-voltage pulse is generated.
  • the configuration is not limited to this.For example, separate pulse generators for generating pulse waveforms having different rise times are separately provided, and the output voltage is switched between when drilling a preliminary hole and when crushing. You may do so.
  • the electrodes may be different for preliminary drilling and crushing, or the same electrode may be used in common.
  • the input energy is increased by changing the pulse voltage waveform.
  • Each of the power supplies 21 and 31 is a DC power supply that outputs predetermined voltages VI and V 2 as shown in FIG.
  • the predetermined voltages VI and V2 are expressed by the following equations. VI ⁇ V2
  • each of the trigger switch circuits 24 and 34 is provided with a series circuit including, for example, a switch composed of a thyratron and the like and a coil having a predetermined inductance.
  • FIG. 9 shows an output voltage waveform from the pulse generator 10 having the above configuration, and the operation in the present embodiment will be described with reference to FIG.
  • the terminal voltage of the capacitor 23 becomes substantially equal to V I after a predetermined time, and a predetermined amount of charge is accumulated in the capacitor 23.
  • the terminal voltage of the capacitor 33 becomes substantially equal to V2 after a predetermined time, and a predetermined amount of electric charge is accumulated in the capacitor 33.
  • the switch of the trigger switching circuit 24 is turned ON, the electric charge of the capacitor 23 is transferred to the capacitor 25, and the terminal voltage of the capacitor 25 reaches approximately V I.
  • the inductance of the coil in the trigger switching circuit 24 is set to be smaller than the inductance of the coil 26, almost all charges of the capacitor 23 are reduced to the respective capacitors 23, 25. The operation shifts to the capacitor 25 with a natural oscillation cycle time determined by the capacitance of the coil and the inductance of the coil in the trigger switch circuit 24.
  • the rising speed of the terminal voltage of the capacitor 35 is increased.
  • a pulse voltage having a high peak voltage value (equal to V 2) and a short rise time is applied between the positive electrode 2 and the negative electrode 3, and dielectric breakdown is likely to occur.
  • the charge of the capacitor 25 is passed through the coil 26 for a predetermined oscillation cycle time. It shifts to the capacitor 35. As a result, the electric charge of the capacitor 25 is slowly discharged from the electrode 1 more slowly than the discharge of the peak voltage pulse. Since the capacity of the capacitor 25 is larger than that of the capacitor 35, the amount of charge (energy) stored in the capacitor 25 is large, and therefore, the discharge energy input to the rock is increased. As a result, a wide range of rocks can be crushed, and efficient electrocrushing can be performed.
  • each of the positive electrode 2 and the negative electrode 3 of the electrode 1 has a rod shape.
  • the positive electrode 2 and the negative electrode 3 of the electrode 1 connected to the pulse generator 10 are inserted at a predetermined distance into one preliminary hole 4 filled with the solution 9.
  • a shock wave is generated by discharging with the solution 9, and it is possible to crush a large amount in a large area around the preliminary hole 4.
  • the positive electrode 2 and the negative electrode 3 are separately inserted into at least two or more different preliminary holes 4 and 4, and the pulse generator 10 is connected between the positive electrode 2 and the negative electrode 3. You may.
  • the pulse generation device described in the present embodiment is used. According to the device 10, after the insulation of rocks and the like is destroyed by high-voltage pulses with a fast rise, a large amount of energy is injected into the rocks in a slow discharge time. Therefore, it is possible to increase the breaking force of the electro-fracture.
  • the output of the power supply 21 is applied to the capacitor 35 via the resistor 27, and the output voltage of the capacitor 3 is applied to the positive electrode 2 of the electrode 1.
  • the output of the power supply 31 is applied to the capacitor 33 via the resistor 32, and the output voltage of the capacitor 33 is applied to the capacitor 35 via the trigger switching circuit 34.
  • FIG. 13 shows the output voltage waveform of the pulse generator 10 described above, and the operation of the present embodiment will be described with reference to FIG.
  • the voltage VI is output from the power supply 21
  • a current flows to the capacitor 35 via the resistor 27, and after a predetermined time, the terminal voltage of the capacitor 35 becomes substantially equal to VI, and a predetermined amount of electric charge is discharged.
  • the voltage between the positive electrode 2 and the negative electrode 3 has a low force voltage equal to the above-mentioned voltage VI, so that the discharge has not yet started.
  • the terminal voltage of the capacitor 33 becomes substantially equal to V 2 after a predetermined time, and a predetermined amount of charge is accumulated in the capacitor 33.
  • FIG. 14 An example in which a plurality of preliminary holes are excavated and crushed over a wide area according to the fifth embodiment will be described with reference to FIGS. 14 and 15.
  • FIG. 14 An example in which a plurality of preliminary holes are excavated and crushed over a wide area according to the fifth embodiment will be described with reference to FIGS. 14 and 15.
  • FIG. 14 An example in which a plurality of preliminary holes are excavated and crushed over a wide area according to the fifth embodiment will be described with reference to FIGS. 14 and 15.
  • a plurality of preliminary holes 4 are drilled as shown in FIG.
  • the same electrode 1 may be used repeatedly for excavation, or at least two or more electrodes 1, 1 and a pulse generator IQ, 10 connected to each electrode 1, 1 may be used. It may be used to excavate at the same time.
  • both switching switches 45 and 46 are turned off, and when either one of the pulse generators 10a outputs a high-voltage pulse, the positive electrode 2a of electrode 1a and the negative electrode of electrode 1b Discharge current flows between 3b. This allows a large amount of material to be crushed over a wide area because the discharge current flows through the rock between the preliminary holes.
  • the present invention provides a method of crushing a substance by pulse electric energy discharge, which can efficiently perform pre-hole drilling and crushing at the time of electro crushing, and can efficiently perform electro crushing, a crushing apparatus thereof, a method of generating a high voltage pulse, And it is useful as a high voltage pulse generator thereof.

Abstract

L'invention porte sur un procédé permettant de concasser un matériau par décharges d'énergie électrique pulsée. Au titre de ce procédé, on fore des avant-trous pour concassage à l'électricité dans le matériau à concasser afin de rendre celui-ci plus facile à concasser et de pouvoir mettre en oeuvre le procédé avec efficacité. On introduit dans les avant-trous (4) forés dans le matériau à concasser des électrodes et l'on concasse le matériau en envoyant du courant électrique grâce à ces électrodes (4) et ce, par l'application d'impulsions à haute tension entre les bornes des électrodes (4) après avoir rempli de solution (9) les espaces existant dans les trous autour des électrodes. On concasse le matériau en introduisant les électrodes prévues à cet effet dans les trous (4) et en envoyant un courant de décharge pour flux de courant de concassage et ce, après avoir foré des trous (4) dans le matériau en envoyant, grâce aux électrodes, un courant de décharge pour flux de courant de forage. On fait passer le courant de décharge pour forage à travers le matériau et le courant de décharge pour concassage à travers la solution.
PCT/JP1997/002888 1996-08-22 1997-08-20 Procede et dispositif permettant de concasser un materiau par decharges d'energie electrique pulsee, procede et dispositif permettant de generer des impulsions a haute tension WO1998007959A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP8241164A JPH1061371A (ja) 1996-08-22 1996-08-22 パルス電気エネルギー放電による物質の破砕方法、その破砕装置、その高電圧パルス発生方法、及びその高電圧パルス発生装置
JP8/241164 1996-08-22

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US8109345B2 (en) 2004-11-17 2012-02-07 Schlumberger Technology Corporation System and method for drilling a borehole
US9416594B2 (en) 2004-11-17 2016-08-16 Schlumberger Technology Corporation System and method for drilling a borehole
CN109647598A (zh) * 2019-01-18 2019-04-19 三峡大学 一种用于固体水中破碎的高压脉冲装置

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KR102179100B1 (ko) * 2018-02-14 2020-11-18 서울대학교산학협력단 충격파 발생 장치 및 이를 이용한 충격파 발생 방법
CN112044569B (zh) * 2020-08-24 2021-08-27 东北大学 一种组合式多电极高压脉冲放电碎裂硬岩装置及破裂方法

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JPS62502733A (ja) * 1985-05-03 1987-10-22 シ−イ−イ−イ−　コ−ポレ−シヨン パルス電気エネルギ−放電による物質の断片化方法及び装置
JPH04222794A (ja) * 1990-04-20 1992-08-12 Noranda Inc プラズマ爆破法
JPH09119283A (ja) * 1995-06-13 1997-05-06 Aitatsuku Kk 固体絶縁体の破壊方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8109345B2 (en) 2004-11-17 2012-02-07 Schlumberger Technology Corporation System and method for drilling a borehole
US9416594B2 (en) 2004-11-17 2016-08-16 Schlumberger Technology Corporation System and method for drilling a borehole
CN109647598A (zh) * 2019-01-18 2019-04-19 三峡大学 一种用于固体水中破碎的高压脉冲装置

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KR19980018739A (ko) 1998-06-05
JPH1061371A (ja) 1998-03-03

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