CN111520076B - High-voltage pulse energy-gathering jet flow generation system and use method thereof - Google Patents
High-voltage pulse energy-gathering jet flow generation system and use method thereof Download PDFInfo
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- CN111520076B CN111520076B CN202010303846.8A CN202010303846A CN111520076B CN 111520076 B CN111520076 B CN 111520076B CN 202010303846 A CN202010303846 A CN 202010303846A CN 111520076 B CN111520076 B CN 111520076B
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 33
- 239000011435 rock Substances 0.000 claims abstract description 22
- 239000012530 fluid Substances 0.000 claims abstract description 15
- 239000003921 oil Substances 0.000 claims description 61
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 46
- 238000003466 welding Methods 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 239000010727 cylinder oil Substances 0.000 claims 2
- 230000005641 tunneling Effects 0.000 abstract description 2
- 238000009412 basement excavation Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 5
- 239000003245 coal Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000005422 blasting Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 230000004313 glare Effects 0.000 description 2
- 230000001151 other effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
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Abstract
The invention discloses a high-pressure pulse energy-gathered jet flow generating system and a using method thereof, the system comprises a high-pressure pulse energy-gathered jet flow generating device, a gas supply system, a fluid supply system and a hydraulic oil supply system, the high-pressure pulse energy-gathered generating device comprises a rear end cover, a pressure cylinder, a piston, a sliding sleeve, a piston sleeve, an energy-gathered nozzle and a front end cover, the system can adjust the conveying pressure of an air source supply system according to different rock hardness working conditions, and can form high-pressure pulse energy-gathered jet flow with the maximum pressure being several times higher than the rock strength under the condition of not increasing the power consumption, thereby realizing the high-efficiency crushing of hard rock stratums and improving the tunneling.
Description
Technical Field
The invention relates to the field of high-voltage pulse energy-gathered jet flow, in particular to a high-voltage pulse energy-gathered jet flow generating system and a using method thereof.
Background
China is still the largest energy consuming country in the world, accounts for 24% of the global energy consumption and 34% of the global energy consumption increase, the percentage of coal in the primary energy structure of China is 58%, coal still can be the most main basic energy of China in a long period of time in the future, and with the continuous exploitation of coal resources of China, the slow excavation speed of hard rock roadways and the maladjustment of the excavation proportion become key problems limiting the development of the coal industry of China.
At present, in domestic rock roadway excavation, a drilling and blasting method and a fully mechanized excavation method are mainly adopted, the drilling and blasting method is low in mechanization degree, serious in surrounding rock damage, difficult to realize continuous excavation of the roadway and high in danger coefficient of operating personnel, the fully mechanized excavation method is large in unit specific energy consumption, serious in cutter abrasion, too large in body vibration and weak in machine reliability in hard rock roadway construction, and the two traditional construction processes cannot realize efficient excavation of the hard rock roadway.
Disclosure of Invention
In view of the technical shortcomings, the invention aims to provide a high-pressure pulse energy-gathering jet generating system and a using method thereof, which can convert gas pressure energy into high-efficiency kinetic energy of pulse jet by means of a piston with area difference and an energy-gathering nozzle, and realize high-efficiency crushing of hard rock by using the impact, erosion and other effects of high-pressure high-speed jet.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention provides a high-pressure pulse energy-gathered jet flow generating system, which comprises a high-pressure pulse energy-gathered jet flow generating device, a gas supply system, a fluid supply system and a hydraulic oil supply system, wherein the high-pressure pulse energy-gathered jet flow generating device comprises a high-pressure pulse energy-gathered jet flow generating device, a gas supply system, a fluid supply system; the high-pressure pulse energy-gathering jet flow generating device comprises a rear end cover, a pressure cylinder, a piston sleeve, an energy-gathering nozzle and a front end cover which are coaxially fixed together in sequence; the pressure cylinder is provided with a piston which is a stepped piston with area difference, the rod end of the piston is connected in a water cavity of a piston sleeve in a sliding way, the energy-gathering nozzle and the front end cover are sequentially provided with an index-shaped hole and a central hole which are communicated with the water cavity, the maximum inner diameter of the left end of the index-shaped hole is the same as the inner diameter of the water cavity, the minimum inner diameter of the right end of the index-shaped hole is the same as the inner diameter of the central hole, an air cavity and an oil cavity are respectively formed among the rear end cover, the piston sleeve and the piston, an air inlet used for communicating the air cavity and an air supply system is arranged on the pressure cylinder, the hydraulic cylinder is characterized in that the pressure cylinder is also provided with an oil inlet and an oil drain port which are used for communicating the oil cavity with a hydraulic oil supply system, the piston sleeve is provided with a water inlet for communicating the water cavity with the fluid supply system, and the inner wall of the pressure cylinder is slidably connected with a sliding sleeve which can open and close the oil drain port and the oil inlet.
Preferably, the gas supply system comprises a control valve, a one-way valve, a gas source console, a gas storage chamber and an air compressor which are sequentially communicated with the gas inlet through pipelines;
the fluid supply system comprises a one-way valve, a control valve, a pump and a water tank which are sequentially communicated with the water inlet through a pipeline, and a pressure gauge is arranged between the one-way valve and the control valve;
the hydraulic oil supply system comprises a one-way valve, a control valve, a high-pressure pump, a hydraulic oil tank and a pressure release valve which are sequentially connected together from an oil inlet to an oil drain port through pipelines, a pressure gauge is arranged between the high-pressure pump and the control valve, and an overflow valve is arranged between the hydraulic oil tank and the control valve.
Preferably, the rear end cover is in threaded connection with the pressure cylinder, and the piston sleeve is in threaded connection with the energy-gathering nozzle.
Preferably, the pressure cylinder, the piston sleeve and the piston are movably sealed by a guide ring and a Glare ring respectively.
Preferably, the sliding sleeve is in clearance fit with the piston sleeve, and a shaft shoulder matched with the oil drainage opening is arranged at the left end of the sliding sleeve.
Preferably, the pressure cylinder and the piston sleeve are fixed by welding, and the front end cover and the energy-gathering nozzle are fixed by screws.
The invention also provides a using method of the high-voltage pulse energy-gathered jet generating system, which comprises the following steps:
a. stopping the movable equipment carrying the high-voltage pulse energy-gathered jet flow generating system to a position 1-1.5 m away from a roadway driving working face, and adjusting the position of the high-voltage pulse energy-gathered jet flow generating device 1 to a target area aligned with a nozzle of the generating device;
b. starting an air source supply system, introducing a certain volume of preset pressure gas into an air cavity of a generating device through an air inlet of the generating device, and then closing an air source control system control valve;
c. starting a hydraulic oil supply system, introducing hydraulic oil into an oil cavity of the pressure cylinder through an oil inlet of the pressure cylinder, and pushing the sliding sleeve to quickly close the oil drainage port by the hydraulic oil; when the oil pressure in the oil cavity reaches a certain pressure, the hydraulic oil pushes the piston to compress the gas in the gas cavity, and the continuous pressure in the gas cavity is increased until the end part of the piston reaches the rear end cover;
d. the piston opens the water inlet in the process of moving to the air cavity, the fluid supply system is started, and water is introduced into the water cavity through the water inlet;
e. opening a pressure release valve of a hydraulic oil supply system, quickly opening an oil drainage port by a sliding sleeve under the pressure difference between the inside and the outside of an oil cavity, quickly reducing the oil pressure in the oil cavity, quickly pushing water in a water cavity to be sprayed out through an energy-collecting nozzle by a piston under the huge pressure difference between an air cavity and the oil cavity to form a high-pressure pulse energy-collecting jet with the maximum pressure reaching the hardness of rocks by multiple times, and crushing the rocks in a target area of a working face;
f. and (4) adjusting the position of the high-voltage pulse energy-gathered jet flow generation system, and repeating the steps c, d and e to break the rock in the new target area.
The invention has the beneficial effects that: according to the high-voltage pulse energy-gathered jet generating system, gas pressure energy is converted into high-efficiency kinetic energy of pulse jet by means of the piston with the area difference and the energy-gathered nozzle, and the hard rock is crushed by the impact, erosion and other effects of high-voltage high-speed jet; compared with the prior art, the invention does not need complicated drilling procedures, can realize continuous rock breaking operation and simultaneously improve operation controllability, uses jet flow to replace the traditional mechanical cutter, reduces the specific energy consumption and dust amount of a tunneling operation unit, improves the construction safety coefficient and reliability, utilizes pulse energy-gathered jet flow which generates a plurality of 'water hammer pressures' in clearance to replace continuous high-pressure jet flow which only generates a single 'stagnation pressure', reduces energy consumption and simultaneously can obviously improve the hard rock breaking capacity.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a connection diagram of components of a high-voltage pulse shaped energy-gathered jet generating system according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a high-voltage pulse energy-gathered jet generating device provided by an embodiment of the invention;
FIG. 3a is a state diagram of a working phase of the sliding sleeve closing oil drainage port according to the embodiment of the present invention;
FIG. 3b is a state diagram of the sliding sleeve according to the embodiment of the present invention during movement;
fig. 3c is a state diagram of a sliding sleeve closing oil inlet working stage according to the embodiment of the present invention.
Description of reference numerals:
1. 1-1 parts of a high-pressure pulse energy-gathering jet flow generating device, 1-2 parts of a rear end cover, 1-2 parts of an air cavity, 1-3 parts of a pressure cylinder, 1-4 parts of an oil drainage port, 1-5 parts of an oil inlet, 1-6 parts of a water cavity, 1-7 parts of an energy-gathering nozzle, 1-8 parts of a front end cover, 1-9 parts of a water inlet, 1-10 parts of a piston sleeve, 1-11 parts of a sliding sleeve, 1-12 parts of an oil cavity, 1-13 parts of a piston, 1-14 parts of a piston and an air; 2. 2-1 parts of a gas supply system, 2-2 parts of a control valve, 2-3 parts of a one-way valve, 2-4 parts of a gas source console, 2-5 parts of a gas storage chamber and an air compressor; 3. 3-1 parts of a fluid supply system, 3-2 parts of a water tank, 3-3 parts of a water pump, 3-4 parts of a control valve, 3-5 parts of a one-way valve and a pressure gauge; 4. 4-1 parts of a hydraulic oil supply system, 4-2 parts of a hydraulic oil tank, 4-3 parts of a pressure release valve, 4-4 parts of a one-way valve, 4-5 parts of a control valve, 4-6 parts of an overflow valve and a high-pressure pump.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 2, a high-pressure pulse energy-gathering jet generating system comprises a high-pressure pulse energy-gathering jet generating device 1, a gas supply system 2, a fluid supply system 3 and a hydraulic oil supply system 4; the high-pressure pulse energy-gathering jet flow generating device 1 comprises a rear end cover 1-1, a pressure cylinder 1-3, a piston sleeve 1-10, an energy-gathering nozzle 1-7 and a front end cover 1-8 which are coaxially fixed together in sequence; the pressure cylinder 1-3 is provided with a piston 1-13, the piston 1-13 is a stepped piston with area difference, the piston rod end of the piston 1-13 is connected in a sliding manner in a water cavity 1-6 of a piston sleeve 1-10, so that a certain pressure ratio is generated between an air cavity 1-2 and the water cavity 1-6 at two ends of the piston 1-13, an index hole and a central hole which are communicated with the water cavity 1-6 are sequentially formed in an energy-collecting nozzle 1-7 and a front end cover 1-8, the maximum inner diameter of the left end of the index hole is the same as the inner diameter of the water cavity 1-6, the minimum inner diameter of the right end of the index hole is the same as the inner diameter of the central hole, the index hole in the embodiment is a hole with the inner diameter decreasing in an exponential order from left to right, the index hole can redistribute uniform energy in a jet water column, and a small part of the front end of the jet flow, the jet flow rock breaking capacity is improved, an air cavity 1-2 and an oil cavity 1-12 are respectively formed among the rear end cover 1-1, the piston sleeve 1-10 and the piston 1-13, an air inlet 1-14 for communicating the air cavity 1-2 with the air supply system 2 is formed on the pressure cylinder 1-3, an oil inlet 1-5 and an oil drainage port 1-4 for communicating the oil cavity 1-12 with the hydraulic oil supply system 4 are also formed on the pressure cylinder 1-3, a water inlet 1-9 for communicating the water cavity 1-6 with the fluid supply system 3 is formed on the piston sleeve 1-10, a conical buffer cavity for buffering the piston 1-13 is further arranged in the piston sleeve 1-10, and a sliding sleeve 1-11 capable of opening and closing the oil drainage port 1-4 and the oil inlet 1-5 is connected on the inner wall of the pressure cylinder 1-3 in a sliding manner, as shown in fig. 3, the positions of the oil drainage ports 1-4 opened and closed by the sliding sleeves 1-11 are shown in each stage.
The gas supply system 2 comprises a control valve 2-1, a one-way valve 2-2, a gas source console 2-3, a gas storage chamber 2-4 and an air compressor 2-5 which are sequentially communicated with a gas inlet 1-14 through a pipeline;
the fluid supply system 3 comprises a one-way valve 3-4, a control valve 3-3, a pump 3-2 and a water tank 3-1 which are sequentially communicated with a water inlet 1-9 through a pipeline, and a pressure gauge 3-5 is arranged between the one-way valve 3-4 and the control valve 3-3;
the hydraulic oil supply system 4 comprises a one-way valve 4-3, a control valve 4-4, a high-pressure pump 4-6, a hydraulic oil tank 4-1 and a pressure relief valve 4-2 which are sequentially connected together from an oil inlet 1-5 to an oil drain port 1-4 through a pipeline, a pressure gauge 3-5 is arranged between the high-pressure pump 4-6 and the control valve 4-4, and an overflow valve 4-5 is arranged between the hydraulic oil tank 4-1 and the control valve 4-4;
the rear end cover 1-1 is in threaded connection with the pressure cylinder 1-3, and the piston sleeve 1-10 is in threaded connection with the energy-gathering nozzle 1-7.
The pressure cylinder 1-3, the piston sleeve 1-10 and the piston 1-13 are respectively sealed in a dynamic way through a guide ring and a Glare ring; so that the piston 1-13 can move inside the pressure cylinder 1-3 and the piston sleeve 1-10.
The sliding sleeve 1-11 is in clearance fit with the piston sleeve 1-10, and the left end of the sliding sleeve 1-11 is provided with a shaft shoulder matched with the oil drainage port 1-4.
The pressure cylinder 1-3 and the piston sleeve 1-10 are fixed by welding, and the front end cover 1-8 and the energy-gathering nozzle 1-7 are fixed by screws.
The embodiment also provides a use method of the high-voltage pulse energy-gathered jet generating system, which specifically comprises the following steps:
a. stopping the movable equipment carrying the high-voltage pulse energy-gathered jet flow generating system to a position of 1-1.5 m of a roadway driving working surface, and adjusting the position of the high-voltage pulse energy-gathered jet flow generating device 1 to a target area aligned with a nozzle of the generating device;
b. starting the gas source supply system 2, introducing a certain volume of preset pressure gas into the gas cavity 1-2 of the generating device through the gas inlet 1-14 of the generating device, and then closing the control valve 2-1 of the gas source control system;
c. starting a hydraulic oil supply system 4, introducing hydraulic oil into an oil cavity 1-12 of the pressure cylinder through an oil inlet 1-5 of the pressure cylinder, and pushing a sliding sleeve 1-11 to quickly close an oil drainage port 1-4 by the hydraulic oil; when the oil pressure in the oil cavity 1-12 reaches a certain pressure, the hydraulic oil pushes the piston 1-13 to compress the gas in the air cavity 1-2, and the continuous pressure in the air cavity 1-2 is increased until the end part of the piston 1-13 reaches the rear end cover 1-1;
d. the pistons 1 to 13 open the water inlets 1 to 9 in the process of moving to the air cavity, the fluid supply system 4 is started, and water is supplied to the water cavities 1 to 6 through the water inlets 1 to 9;
e. opening a pressure relief valve 4-2 of a hydraulic oil supply system 4, quickly opening an oil drainage port 1-4 by a sliding sleeve 1-11 under the internal and external pressure difference of an oil cavity 1-12, quickly reducing the oil pressure in the oil cavity 1-12, quickly pushing water in a water cavity 1-9 by a piston 1-3 under the huge pressure difference of an air cavity 1-2 and the oil cavity 1-12 to be sprayed out through an energy-gathering nozzle 1-7 to form a high-pressure pulse energy-gathering jet flow with the maximum pressure reaching several times of the hardness of rocks, and crushing the rocks in a target area of a working face;
f. and (4) adjusting the position of the high-voltage pulse energy-gathered jet flow generation system, and repeating the steps c, d and e to break the rock in the new target area.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (7)
1. A high-pressure pulse energy-gathering jet flow generation system is characterized by comprising a high-pressure pulse energy-gathering jet flow generation device (1), a gas supply system (2), a fluid supply system (3) and a hydraulic oil supply system (4); the high-pressure pulse energy-gathering jet flow generating device (1) comprises a rear end cover (1-1), a pressure cylinder (1-3), a piston sleeve (1-10), an energy-gathering nozzle (1-7) and a front end cover (1-8) which are coaxially fixed together in sequence; the pressure cylinder (1-3) is provided with a piston (1-13), the piston (1-13) is a stepped piston with area difference, the piston rod end of the piston is connected in an annular water cavity (1-6) of a piston sleeve (1-10) in a sliding mode, an index-shaped hole and a central hole which are communicated with the water cavity (1-6) are sequentially formed in the energy-collecting nozzle (1-7) and the front end cover (1-8), the index-shaped hole is a hole with the inner diameter decreasing exponentially from left to right, the maximum inner diameter of the left end of the index-shaped hole is the same as the inner diameter of the water cavity (1-6), and the minimum inner diameter of the right end of the index-shaped hole is the same as the inner diameter of the central hole;
an air cavity (1-2) and an oil cavity (1-12) are respectively formed among the rear end cover (1-1), the piston sleeve (1-10) and the piston (1-13), the pressure cylinder (1-3) is provided with an air inlet (1-14) for communicating the air cavity (1-2) with the gas supply system (2), the pressure cylinder (1-3) is also provided with an oil inlet (1-5) and an oil drain port (1-4) which are used for communicating the oil cavity (1-12) with a hydraulic oil supply system (4), the piston sleeve (1-10) is provided with a water inlet (1-9) for communicating the water cavity (1-6) and the fluid supply system (3), the inner wall of the pressure cylinder (1-3) is connected with a sliding sleeve (1-11) which can open and close the oil drain port (1-4) and the oil inlet (1-5) in a sliding manner.
2. The high-pressure pulse energy-gathering jet generating system as claimed in claim 1, wherein the gas supply system (2) comprises a control valve (2-1), a one-way valve (2-2), a gas source console (2-3), a gas storage chamber (2-4) and an air compressor (2-5) which are sequentially communicated with the gas inlets (1-14) through pipelines;
the fluid supply system (3) comprises a one-way valve (3-4), a control valve (3-3), a pump (3-2) and a water tank (3-1) which are sequentially communicated with the water inlet (1-9) through a pipeline, and a pressure gauge (3-5) is arranged between the one-way valve (3-4) and the control valve (3-3);
the hydraulic oil supply system (4) comprises a one-way valve (4-3), a control valve (4-4), a high-pressure pump (4-6), a hydraulic oil tank (4-1) and a pressure release valve (4-2) which are sequentially connected together from an oil inlet (1-5) to an oil drain port (1-4) through a pipeline, a pressure gauge (3-5) is arranged between the high-pressure pump (4-6) and the control valve (4-4), and an overflow valve (4-5) is arranged between the hydraulic oil tank (4-1) and the control valve (4-4).
3. A high-pressure pulse shaped-jet generating system as claimed in claim 1, characterized in that said rear end cap (1-1) is screwed to said pressure cylinder (1-3) and said piston sleeve (1-10) is screwed to said shaped nozzle (1-7).
4. A high-pressure pulse shaped energy jet generating system as claimed in claim 1, characterized in that the pressure cylinder (1-3), the piston sleeve (1-10) and the piston (1-13) are movably sealed by a guide ring and a greige ring, respectively.
5. The high-pressure pulse energy-gathering jet generating system as claimed in claim 1, wherein the sliding sleeve (1-11) is in clearance fit with the piston sleeve (1-10), and the left end of the sliding sleeve (1-11) is provided with a shaft shoulder matched with the oil drainage port (1-4).
6. The high-pressure pulse energy-gathering jet generating system as claimed in claim 1, wherein the pressure cylinder (1-3) and the piston sleeve (1-10) are fixed by welding, and the front end cover (1-8) and the energy-gathering nozzle (1-7) are fixed by screws.
7. A method of using the high pressure pulse shaped energy jet generating system of claim 2, comprising the steps of:
stopping the movable equipment carrying the high-voltage pulse energy-gathered jet flow generating system to a position 1-1.5 m away from a roadway driving working face, and adjusting the position of the high-voltage pulse energy-gathered jet flow generating device (1) to a target area aligned with a nozzle of the generating device;
b. starting an air source supply system (2), introducing a certain volume of preset pressure gas into an air cavity (1-2) of a generating device through an air inlet (1-14) of the generating device, and then closing a control valve (2-1) of an air source control system;
c. starting a hydraulic oil supply system (4), introducing hydraulic oil into the pressure cylinder oil cavities (1-12) through pressure cylinder oil inlets (1-5), and pushing the sliding sleeves (1-11) by the hydraulic oil to quickly close the oil drainage ports (1-4); when the oil pressure in the oil cavity (1-12) reaches a certain pressure, the hydraulic oil pushes the piston (1-13) to compress the gas in the air cavity (1-2), and the continuous pressure in the air cavity (1-2) rises until the end part of the piston (1-13) reaches the rear end cover (1-1);
d. the water inlet (1-9) is opened by the piston (1-13) in the process of moving to the air cavity, the fluid supply system (4) is started, and water is introduced into the water cavity (1-6) through the water inlet (1-9);
e. opening a pressure relief valve (4-2) of a hydraulic oil supply system (4), quickly opening an oil drainage port (1-4) by a sliding sleeve (1-11) under the internal and external pressure difference of an oil cavity (1-12), quickly reducing the oil pressure in the oil cavity (1-12), quickly pushing water in a water cavity (1-9) to be sprayed out through an energy-gathering nozzle (1-7) by a piston (1-3) under the huge pressure difference of the air cavity (1-2) and the oil cavity (1-12), forming a high-pressure pulse energy-gathering jet flow with the maximum pressure capable of reaching the hardness of rocks to be multiplied, and crushing the rocks in a target area of a working face;
f. and (4) adjusting the position of the high-voltage pulse energy-gathered jet flow generation system, and repeating the steps c, d and e to break the rock in the new target area.
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Effective date of registration: 20230719 Address after: No. 1, Huatai Road, high tech Industrial Development Zone, Xuzhou, Jiangsu 221000 Patentee after: JIANGSU ZHONGJI MINE EQUIPMENT Co.,Ltd. Address before: 221116 No. 1 Tongshan University Road, Xuzhou City, Jiangsu Province Patentee before: CHINA University OF MINING AND TECHNOLOGY |