CN114152160B - Orifice directional stone crushing device adopting high-voltage electric pulse and construction method thereof - Google Patents

Abstract

The invention discloses an in-hole directional stone crushing device adopting high-voltage electric pulse, which comprises a device shell, wherein the device shell is provided with a high-voltage electric pulse component, a wire changing component, a liquid explosive liquid injection component and an insulating material, the insulating material is filled in an inner cavity of the device shell, a sealing rubber ring is embedded in the middle part of the device shell near the outer side, and part parts on the high-voltage electric pulse component, the wire changing component and the liquid explosive liquid injection component are biased in the device shell; the liquid explosive injection assembly injects the liquid mixed explosive into the hole to be blasted, and the injected liquid mixed explosive is positioned below the sealing rubber ring. The invention has compact layout, simple use method, reliable performance and convenient maintenance, realizes directional rock breaking by adopting a fan-shaped lower modeling, improves the rock breaking effect by blasting the metal wire through high-voltage electric pulse and triggering secondary explosion of the liquid mixed explosive, can accurately control the explosion energy by adjusting the stored electric energy and the injection explosive amount, and can continuously implement discharge explosion for multiple times.

Description

Orifice directional stone crushing device adopting high-voltage electric pulse and construction method thereof

Technical Field

The invention relates to the technical field of piling and rock breaking, in particular to an in-hole directional stone breaking device adopting high-voltage electric pulse and a construction method thereof.

Background

Piling work is widely applied to the fields of bridges, buildings and the like, and mainly aims to enable the foundation of a ground building to go deep underground and ensure enough rock-soil strength to support building pressure. However, when hard rock is encountered during pile driving, if the operation is continued using a conventional pile driver, the working time may be increased and the machine may be severely damaged. Meanwhile, the mechanical piling strength is increased, and meanwhile, the rock and soil in a non-target crushing area are easily loosened and damaged, so that the engineering quality and efficiency are influenced.

Disclosure of Invention

The invention aims to provide an in-hole directional stone crushing device adopting high-voltage electric pulse and a construction method thereof, which combine the advantages of high crushing energy and controllability of the high-voltage electric pulse technology with the semicircular design of a pile driver to form a basic device for directional electric pulse blasting.

In order to solve the technical problems, the invention adopts the following technical scheme:

the invention discloses an in-hole directional stone crushing device adopting high-voltage electric pulse, which comprises a device shell, wherein the device shell is provided with four parts, namely a high-voltage electric pulse assembly, a wire changing assembly, a liquid explosive injection assembly and an insulating material; the insulating material is filled in the inner cavity of the device shell, a sealing rubber ring is embedded in the middle part of the device shell near the outer side, and part parts on the high-voltage electric pulse assembly, the wire changing assembly and the liquid explosive filling assembly are deviated in the device shell; the liquid explosive injection assembly injects liquid mixed explosive into the hole to be blasted, and the injected liquid mixed explosive is located below the sealing rubber ring.

Further, the high-voltage electric pulse assembly comprises an external high-voltage electric pulse generator, a positive electrode needle, a negative electrode needle and a high-voltage power switch, wherein the high-voltage electric pulse generator is positioned outside the device shell, the high-voltage power switch is arranged on the high-voltage electric pulse generator, the high-voltage electric pulse generator is connected with the positive electrode needle and the negative electrode needle which are positioned inside the device shell through insulated wires, and the axes of the positive electrode needle and the negative electrode needle are positioned on the same straight line and are respectively connected with the inner sides of the upper end face and the lower end face of the device shell.

Further, the wire changing assembly comprises a wire changing knob and a wire box, wherein the wire changing knob is positioned on the outer end face of the device shell, and the wire changing knob is connected with the wire box positioned in the device shell through an insulating rod; the positive electrode needle is contacted with the upper end face of the metal wire box, the negative electrode needle is contacted with the lower end face of the metal wire box, and the positive electrode needle and the negative electrode needle are contacted with one pair of electrode needles in the metal wire box when in operation; the wire changing knob is rotated to drive the metal wire box to rotate by taking the axis of the insulating rod as the center through the insulating rod, so that the position of the electrode needle head is driven to change.

Further, the liquid explosive injection assembly comprises an external liquid injection pump, the liquid injection pump is communicated with an outer port of an injection channel through an injection pipe, an explosion-proof injection valve is arranged on the injection pipe, the injection channel is arranged at the center of the insulating rod and penetrates through the insulating rod from top to bottom, the bottom end of the insulating rod penetrates through the wire box to be abutted with the bottom surface of the device shell, and an injection outlet is formed in the side wall of the insulating rod, which is positioned in the wire box; and the liquid mixed explosive in the liquid injection pump is injected into the hole to be blasted through the liquid injection channel.

Further, the metal wire box is cylindrical and comprises a metal wire box shell, a plurality of pairs of electrode needles are symmetrically arranged on the upper top surface and the lower bottom surface of the metal wire box shell, and any pair of the electrode needles corresponding to the upper electrode needle and the lower electrode needle is connected through metal wires.

Further, the insulating rod is connected to the center of the metal wire box in a penetrating mode, a plurality of pairs of electrode needles are circumferentially and uniformly distributed in the metal wire box, and the number of the metal wires is the same as the number of the electrode needles in a one-to-one correspondence mode.

Furthermore, the insulating rod and the metal wire box shell are made of insulating materials.

Further, the device housing comprises a circular upper portion and a fan-shaped lower portion, wherein the angle of coverage of the fan-shaped lower portion is greater than 0 degrees and less than 360 degrees; the wire changing knob, the insulating rod and the metal wire box are biased in the device shell.

The construction method of the in-hole directional stone breaking device adopting the high-voltage electric pulse specifically comprises the following steps:

step one, processing a hole to be blasted, wherein the hole to be blasted is drilled by a drilling machine by adopting a conventional means, the diameter of the hole to be blasted is larger than the outer diameter of a shell of the device, and the number and the positions of the holes to be blasted are determined according to a design drawing;

step two, mounting the directional stone breaking device in the hole, namely connecting a high-voltage electric pulse generator and a liquid injection pump at corresponding positions of a device shell through an insulating wire and a liquid injection pipe, and pushing the assembled devices into the hole to be blasted, wherein the periphery of the sealing rubber ring is tightly attached to the inner wall of the hole to be blasted and sealed well after the mounting is completed;

step three, liquid injection operation, namely opening an explosion-proof liquid injection valve, and injecting liquid mixed explosive into the part below the sealing rubber ring through a liquid injection pipe and a liquid injection channel by a liquid injection pump;

step four, electrifying and blasting, namely starting a high-voltage pulse generator to charge, closing a high-voltage power switch after charging to a preset voltage, and conducting electricity to a connected electrode needle through a positive electrode needle and a negative electrode needle to cause metal wire electric blasting, so that the liquid mixed explosive is promoted to explode;

fifthly, wire replacement operation, namely rotating a wire replacement shifting button to sequentially screw unused metal wires between the positive electrode needle and the negative electrode needle after discharge is finished;

and then repeating the third, fourth and fifth steps, and continuously blasting the reinforcing effect until the rock breaking operation is completed.

Compared with the prior art, the invention has the beneficial technical effects that:

the invention relates to an in-hole directional stone crushing device adopting high-voltage electric pulse, which is mainly matched with a pile driver to be used, and pre-blasting operation is carried out on a special rock area before the pile driver is perforated according to actual needs;

1) The lower half part of the device shell is set to be a fan-shaped lower part, and the fan-shaped lower part is sealed by the sealing rubber ring to limit explosion energy, so that rock and soil which does not belong to a target explosion range is protected. Meanwhile, the opening side corresponding to the lower part of the fan concentrates the blasting energy to the rock and soil in the target blasting range, so that the directional blasting is realized, the utilization rate of the energy is improved to the greatest extent, and the blasting purpose and effectiveness are enhanced.

2) According to the invention, after each discharge, unused metal wires can be screwed into the explosion position between the positive electrode needle and the negative electrode needle by rotating the wire conversion knob. Therefore, the device can be repeatedly blasted only once, and the number of the wires which can be installed in the wire box can be set according to actual conditions, so that the operation procedure is greatly simplified, the workload is reduced, and the rock breaking effect is improved. Meanwhile, the metal wire which is not screwed into the explosion position plays a role in safety locking because the current cannot be conducted.

3) The liquid mixed explosive used in the invention is characterized in that the liquid explosive is mixed with metal powder, after high-voltage pulse discharge, the metal wire is electrically blasted to form a discharge channel, the metal powder is rapidly conductive and detonates the liquid explosive to form secondary blasting, in the process, the metal powder is driven into a rock-soil gap by detonation waves to be widely distributed, the conductivity of the subsequent discharge blasting is enhanced, and the blasting effect is improved.

In general, the invention combines the advantages of high crushing energy and controllability of the high-voltage pulse technology with the modeling of the device shell to form a basic device for directional electric pulse blasting; the device has compact layout, simple use method, reliable performance and convenient maintenance, realizes directional rock breaking by adopting a fan-shaped lower modeling, improves the rock breaking effect by blasting the metal wire through high-voltage electric pulse and triggering secondary explosion of the liquid mixed explosive, can accurately control the blasting energy by adjusting and storing electric energy and injecting explosive amount, skillfully installs the metal wire box, quickly realizes primary installation, can continuously implement discharge blasting for multiple times, is very favorable for solving the difficult problems of hard rock breaking or incapability of breaking, machine damage and the like in the piling process, and has wide engineering application prospect.

Drawings

The invention is further described with reference to the following description of the drawings.

FIG. 1 is a schematic diagram of an in-hole directional lithotripter employing high voltage electrical pulses in accordance with the present invention;

FIG. 2 is a schematic view in forward section of a pile driver according to the present invention;

FIG. 3 is a schematic side cross-sectional view of a pile driver according to the present invention;

FIG. 4 is an enlarged view of the wire cassette of the present invention;

fig. 5 is a top view of the pile driver of the present invention;

FIG. 6 is a top view of the wire box of the present invention;

FIG. 7 is a schematic view of the present invention in use;

reference numerals illustrate: 1. a wire changing knob; 2. an insulating rod; 3. a positive electrode needle; 4. a wire cassette; 5. an electrode needle; 6. a negative electrode needle; 7. a wire; 8. sealing the rubber ring; 9. an insulating material; 10. a liquid injection channel; 11. an insulated wire; 12. a high voltage electric pulse generator; 13. a high voltage power switch; 14. a liquid mixed explosive; 15. an explosion-proof liquid injection valve; 16. a liquid injection pipe; 17. a liquid injection pump; 18. a device housing;

7-1, a first wire; 7-2, a second wire; 7-3, a third metal wire.

Detailed Description

1-7, an in-hole directional stone crushing device adopting high-voltage electric pulse comprises a device shell 18, wherein the device shell 18 is provided with four parts of a high-voltage electric pulse assembly, a wire changing assembly, a liquid explosive injection assembly and an insulating material 9; the insulating material 9 is filled in the inner cavity of the device shell 18, a sealing rubber ring 8 is embedded at the outer side of the middle part of the device shell 18, and part parts on the high-voltage electric pulse assembly, the wire changing assembly and the liquid explosive injection assembly are deviated in the device shell 18; the liquid explosive injection assembly injects the liquid mixed explosive 14 into the hole to be blasted, and the injected liquid mixed explosive 14 is located below the sealing rubber ring 8.

Specifically, the injected liquid blended explosive 14 refers to a mixture of liquid explosive (including but not limited to NFDA4 hydrazine hydrate) and metal powder (including but not limited to copper powder, aluminum powder). After the high-voltage pulse discharge, the metal wire is electrically blasted to form a discharge channel, the metal powder is rapidly conductive and simultaneously detonates the liquid explosive to form secondary blasting, in the process, the metal powder is driven into the rock-soil gap by detonation waves to be widely distributed, the conductivity of the subsequent discharge blasting is enhanced, and the blasting effect is improved.

Specifically, the high-voltage electric pulse assembly comprises an external high-voltage electric pulse generator 12, a positive electrode needle 3, a negative electrode needle 6 and a high-voltage electric switch 13, wherein the high-voltage electric pulse generator 12 is positioned outside the device shell 18, the high-voltage electric switch 13 is installed on the high-voltage electric pulse generator 12, the high-voltage electric pulse generator 12 is connected with the positive electrode needle 3 and the negative electrode needle 6 positioned inside the device shell 18 through insulated wires 11, and the axes of the positive electrode needle 3 and the negative electrode needle 6 are positioned on the same straight line and are respectively connected with the inner sides of the upper end face and the lower end face of the device shell 18.

Specifically, the wire changing assembly comprises a wire changing knob 1 and a wire box 4, wherein the wire changing knob 1 is positioned on the outer end surface of the device shell 18, the wire changing knob 1 is connected with the wire box 4 positioned inside the device shell 18 through an insulating rod 2, and the wire changing knob 1 is connected to the top of the insulating rod 2 through bonding or threads; the positive electrode needle 3 is contacted with the upper end face of the metal wire box 4, the negative electrode needle 6 is contacted with the lower end face of the metal wire box 4, and the positive electrode needle 3 and the negative electrode needle 6 are contacted with one pair of electrode needles 5 in the metal wire box 4 when in operation; the wire changing knob 1, the insulating rod 2 and the metal wire box 4 are connected into a whole, and the wire changing knob 1 is rotated to drive the metal wire box 4 to rotate by taking the axis of the insulating rod 2 as the center through the insulating rod 2, so that the position of the electrode needle 5 is driven to change.

The liquid explosive liquid injection assembly comprises an external liquid injection pump 17, the liquid injection pump 17 is communicated with the outer port of the liquid injection channel 10 through a liquid injection pipe 16, an explosion-proof liquid injection valve 15 is arranged on the liquid injection pipe 16, the liquid injection channel 10 is arranged at the center of the insulating rod 2 and penetrates from top to bottom, the bottom end of the insulating rod 2 penetrates through the wire box 4 to be abutted with the bottom surface of the device shell 18, and a liquid injection outlet is formed in the side wall of the insulating rod 2, which is positioned in the wire box 4; the liquid mixed explosive 14 in the liquid injection pump 17 is injected into the hole to be blasted through the liquid injection channel 10.

As shown in fig. 4-6, the wire box 4 is cylindrical and comprises a wire box shell, wherein a plurality of pairs of electrode needles 5 are symmetrically arranged on the upper top surface and the lower bottom surface of the wire box shell, and any pair of the electrode needles 5 corresponding to the upper electrode needle 5 and the lower electrode needle 5 are connected through a wire 7; the electrode needle 5 and the wire 7 are placed into a mold as an insert during the manufacture of the wire box 4, and injection molding is adopted. Specifically, the insulating rod 2 is connected to the center of the wire box 4 in a penetrating manner, the electrode needles 5 are circumferentially and uniformly distributed in the wire box 4, and the number of the wires 7 is the same as the number of the electrode needles 5 in a one-to-one correspondence manner. The insulating rod 2 and the metal wire box shell are made of insulating materials. Specifically, when three pairs of electrode needles 5 are arranged, three metal wires 7 are also arranged, and when the first metal wire 7-1, the second metal wire 7-2 and the third metal wire 7-3 are respectively exploded for the first time, the electrode needles 5 corresponding to the first metal wire 7-1 are aligned and connected with the positive electrode needle 3 and the negative electrode needle 6; after the power-on explosion, the first metal wire 7-1 is exploded and broken, and then the unused two metal wires are screwed between the positive electrode needle 3 and the negative electrode needle 6 in sequence through the rotary wire switching knob 1, so that continuous explosion is completed. The number of wires 7 mountable on the wire magazine 4 is dependent on the circumstances, and a number of wires may be repeatedly blasted each time the pile driver is arranged.

As shown in fig. 3 and 4, the device housing 18 has a circular upper portion and a fan-shaped lower portion, the fan-shaped lower portion having a coverage angle of > 0 ° and < 360 °; the wire changing knob 1, the insulating rod 2 and the wire box 4 are biased in the device shell 18, specifically, the upper fan-shaped lower part of the device shell 18 is below the sealing ring, the part is designed into a fan-shaped protection shell with a certain angle, and the rest angles are open structures for filling the liquid mixed explosive 14. As shown in fig. 6, the angle of the lower part of the fan shape is 180 °, i.e. the left side is set as the lower part of the fan shape with the protection function, and the right side is set as the opening side, so that the filling of the liquid mixed explosive 14 is realized, and the directional blasting is facilitated. The segmented arrangement of the device housing 18, the closed circular upper portion can limit the explosion energy, protecting the wall surface of the wellbore; the open fan lower portion concentrates blast energy to the rock of the target blast zone.

As shown in fig. 7, a construction method of the in-hole directional stone crushing device adopting high-voltage electric pulse as described above specifically comprises the following steps: first, the in-hole directional rock breaking device is installed at a designated position of the pile driver, the device is arranged on pre-broken rock, and the opening design of the central point device of the breaking range can be determined according to the positions of other devices arranged around the device, so that the explosion energy of the two devices is transmitted towards each other. A plurality of devices can be installed in a blasting range, and openings of the devices are limited to play a role in guiding the energy transmission direction;

step one, processing a hole to be blasted, wherein the hole to be blasted is drilled by a drilling machine by adopting a conventional means, the diameter of the hole to be blasted is larger than the outer diameter of the device shell 18, and the number and the positions of the holes to be blasted are determined according to a design drawing;

step two, mounting the directional stone breaking device in the hole, namely firstly connecting the high-voltage pulse generator 12 and the liquid injection pump 17 at corresponding positions of a device shell through an insulating lead 11 and a liquid injection pipe 16, then pushing the assembled devices into the hole to be blasted, and tightly attaching and sealing the periphery of the sealing rubber ring 8 with the inner wall of the hole to be blasted to be perfect after the mounting is completed;

step three, liquid injection operation, namely opening an explosion-proof liquid injection valve 15, and injecting liquid mixed explosive 14 into the part below the sealing rubber ring 8 through a liquid injection pipe 16 and a liquid injection channel 10 by a liquid injection pump 17;

step four, electrifying and blasting, namely starting a high-voltage pulse generator 12 to charge, closing a high-voltage power switch 13 after charging to a preset voltage, and conducting electricity to a connected electrode needle 5 through a positive electrode needle 3 and a negative electrode needle 6 to cause electric blasting of a metal wire 7, so that the explosion of a liquid mixed explosive 14 is promoted;

fifthly, wire replacement operation, namely rotating the wire replacement pulling button 1 to sequentially screw unused wires 7 between the positive electrode 3 and the negative electrode needle 6 after discharge is finished; and then repeating the third, fourth and fifth steps, and continuously blasting the reinforcing effect until the rock breaking operation is completed.

In use, high voltage electricity generated by the high voltage electricity pulse generator 12 is transmitted to the positive electrode needle 3 and the negative electrode needle 6 through the insulated wire 11, and the metal wire 7 generates electric explosion to form a plasma channel due to the action of an external electric field. The strong impact current is injected into the ion channel in a very short time, the energy density, pressure and temperature in the channel rise instantaneously, a huge pressure gradient and temperature gradient are formed between the ion channel and the surrounding liquid mixed explosive 14, and under the combined action of the expansion potential energy and the heat radiation pressure energy, the plasma channel expands outwards at a speed of 102-103 m/s, so that the impact wave is formed. Meanwhile, the metal powder rapidly conducts electricity and heat in a large range to cause explosion of the liquid explosive, acts on the rock mass and achieves the aim of breaking the rock mass.

Specifically, when blasting operation is carried out, 700L of liquid mixed explosive 14 is injected into the part below the liquid injection scale mark in the device; the liquid blended explosive 14 refers to a mixture of liquid explosive (including but not limited to NFDA4 hydrazine hydrate) and metal powder (including but not limited to copper powder, aluminum powder); the high-voltage electric pulse charging preset voltage is 300-500kV; the metal wire 7 is made of aluminum wire. The specific dosage is set according to the characteristics of the blasted rock.

The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.

Claims (8)

1. An intra-hole directional stone crushing device adopting high-voltage electric pulse is characterized in that: the device comprises a device shell (18), wherein the device shell (18) is provided with four parts, namely a high-voltage electric pulse assembly, a wire changing assembly, a liquid explosive injection assembly and an insulating material (9); the insulating material (9) is filled in the inner cavity of the device shell (18), a sealing rubber ring (8) is embedded in the middle part of the device shell (18) towards the outer side, and part parts on the high-voltage electric pulse assembly, the wire changing assembly and the liquid explosive injection assembly are deviated in the device shell (18); the liquid explosive injection assembly injects liquid mixed explosive (14) into a hole to be blasted, and the injected liquid mixed explosive (14) is positioned below the sealing rubber ring (8);

the high-voltage electric pulse assembly comprises an external high-voltage electric pulse generator (12), a positive electrode needle (3), a negative electrode needle (6) and a high-voltage power switch (13);

the wire changing assembly comprises a wire changing knob (1) and a metal wire box (4), wherein the wire changing knob (1) is positioned on the outer end face of the device shell (18), and the wire changing knob (1) is connected with the metal wire box (4) positioned inside the device shell (18) through an insulating rod (2); the positive electrode needle (3) is contacted with the upper end face of the metal wire box (4), the negative electrode needle (6) is contacted with the lower end face of the metal wire box (4), and the positive electrode needle (3) and the negative electrode needle (6) are contacted with one pair of electrode needles (5) in the metal wire box (4) when in operation; the wire changing knob (1) is rotated to drive the metal wire box (4) to rotate by taking the axis of the insulating rod (2) as the center through the insulating rod (2), so that the position of the electrode needle head (5) is driven to change.

2. The in-hole directional lithotripter of claim 1, wherein the high voltage pulse is applied by: the high-voltage power switch (13) is installed on the high-voltage power pulse generator (12), the high-voltage power pulse generator (12) is connected with a positive electrode needle (3) and a negative electrode needle (6) which are positioned in the device shell (18) through insulated wires (11), and the axes of the positive electrode needle (3) and the negative electrode needle (6) are positioned on the same straight line and are respectively connected with the inner sides of the upper end face and the lower end face of the device shell (18).

3. The in-hole directional lithotripter of claim 2, wherein the high voltage pulse is applied by: the liquid explosive injection assembly comprises an external liquid injection pump (17), the liquid injection pump (17) is communicated with an outer port of an injection channel (10) through an injection pipe (16), an explosion-proof injection valve (15) is arranged on the injection pipe (16), the injection channel (10) is arranged at the center of an insulating rod (2) and penetrates through the insulating rod from top to bottom, the bottom end of the insulating rod (2) penetrates through the metal wire box (4) to be abutted with the bottom surface of a device shell (18), and an injection outlet is formed in the side wall of the insulating rod (2) positioned in the metal wire box (4); the liquid mixed explosive (14) in the liquid injection pump (17) is injected into the hole to be blasted through the liquid injection channel (10).

4. The in-hole directional lithotripter of claim 3, wherein the high voltage pulse is applied by: the metal wire box (4) is cylindrical and comprises a metal wire box shell, a plurality of pairs of electrode needles (5) are symmetrically arranged on the upper top surface and the lower bottom surface of the metal wire box shell, and any pair of the electrode needles (5) corresponding to the upper electrode needle and the lower electrode needle are connected through metal wires (7).

5. The in-hole directional lithotripter of claim 4, wherein the high voltage pulse is applied by: the insulation rods (2) are connected with the centers of the metal wire boxes (4) in a penetrating mode, a plurality of pairs of electrode needle heads (5) are circumferentially and uniformly distributed in the metal wire boxes (4), and the number of the metal wires (7) is the same as that of the electrode needle heads (5) in a one-to-one correspondence mode.

6. The in-hole directional lithotripter of claim 5, wherein the high voltage pulse is applied by: the insulating rod (2) and the metal wire box (4) shell are made of insulating materials.

7. The in-hole directional lithotripter of claim 5, wherein the high voltage pulse is applied by: the device housing (18) has an outer shape comprising a circular upper portion and a fan-shaped lower portion, the fan-shaped lower portion having a coverage angle of > 0 ° and < 360 °; the wire changing knob (1), the insulating rod (2) and the metal wire box (4) are biased in the device shell (18).

8. A method of construction using an in-hole directional lithotripter of any one of claims 3 to 7 using high voltage electrical pulses, comprising the steps of:

step one, processing a hole to be blasted, wherein the hole to be blasted is drilled by a drilling machine by adopting a conventional means, the diameter of the hole to be blasted is larger than the outer diameter of the device shell (18), and the number and the positions of the holes to be blasted are determined according to a design drawing;

step two, mounting the directional stone breaking device in the hole, namely connecting a high-voltage electric pulse generator (12) and a liquid injection pump (17) together at corresponding positions of a device shell through an insulating lead (11) and a liquid injection pipe (16), pushing the assembled devices into the hole to be blasted, and tightly attaching and sealing the periphery of the sealing rubber ring (8) with the inner wall of the hole to be blasted to be perfect after the mounting;

step three, liquid injection operation, namely opening an explosion-proof liquid injection valve (15), and injecting liquid mixed explosive (14) into a part below the sealing rubber ring (8) through a liquid injection pipe (16) and a liquid injection channel (10) by a liquid injection pump (17);

step four, electrifying and blasting, namely starting a high-voltage pulse generator (12) to charge, closing a high-voltage power switch (13) after charging to a pre-voltage, and conducting electricity to a connected electrode needle (5) through a positive electrode needle (3) and a negative electrode needle (6) to cause electric explosion of a metal wire (7), so that the explosion of a liquid mixed explosive (14) is promoted;

step five, wire replacement operation, namely after discharge is finished, rotating a wire replacement knob (1) to sequentially screw unused metal wires (7) between a positive electrode needle (3) and a negative electrode needle (6);

and then repeating the third, fourth and fifth steps, and continuously blasting the reinforcing effect until the rock breaking operation is completed.

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