Ice particle instant preparation and ice particle air jet slotting and permeability enhancing device and method

Abstract

The present application belongs to the technical field of coal mine gas control and coal bed gas development, and particularly relates to an ice particle instant preparation and ice particle air jet slotting and permeability improvement device and method, comprising a gas source pipeline, a water source pipeline, a double-layer drill rod and a directional drilling machine, the gas source pipeline is communicated with the inner layer drill rod of the double-layer drill rod through a water tail inlet one, the water source pipeline is communicated with the outer layer drill rod of the double-layer drill rod through a water tail inlet two, the outer layer drill rod and the inner layer drill rod are fixedly connected through a partition plate, the double-layer drill rod is provided with an ice particle self-generation and drilling and cutting integrated assembly at the front end, the ice particle self-generation and drilling and cutting integrated assembly is provided with a drill bit at the front end and is connected through a thread, and the ice particle self-generation and drilling and cutting integrated assembly is additionally arranged between the double-layer drill rod and the drill bit on the basis of a conventional drilling equipment. The device is based on the principle that high-pressure air is cooled and accelerated through a Laval nozzle, ice particles are rapidly prepared at the front end of the drill rod, a continuous and stable ice particle air jet is formed, and the coal body is broken.

Description

Technical Field

[0001] This invention belongs to the field of coal mine gas control and coalbed methane development technology, and particularly relates to an instant ice particle preparation and ice particle air jet slotting permeability enhancement device and method. Background Technology

[0002] Coal, as my country's primary energy source, has always played a crucial role in emergency response, peak shaving, and providing a safety net. Ensuring safe and efficient coal production is vital for maintaining energy and economic stability. Gas control is the top priority for safe production in gas-bearing mines. As a coal-associated gas, coalbed methane (CBM) threatens mine safety, but it is also a clean energy source. Efficient development of CBM can effectively alleviate oil and gas resource shortages and contribute to the implementation of the "dual-carbon" policy. Poor gas extraction efficiency in hard or soft coal seams has severely hampered gas control and development efficiency. Especially with increasing coal mining depth, the characteristics of high stress, high gas content, and low permeability in coal seams become more prominent, leading to increasing difficulty in gas extraction and frequent accidents. To fully unleash the advanced production capacity of coal and CBM resources, it is necessary to enhance the efficiency of gas extraction from hard or deep coal seams.

[0003] Pressure relief and permeability enhancement are common methods for improving gas extraction efficiency. Hydraulic measures are one of the important means to achieve pressure relief and permeability enhancement in coal seams. Traditional hydraulic measures include hydraulic perforation and hydraulic slotting. This technology uses a high-pressure pump to pressurize fluid to a certain pressure, and then converts its static pressure energy into jet impact kinetic energy through a nozzle, thereby achieving slotting and permeability enhancement. However, it has poor fracturing effect on hard or deep coal seams and is difficult to achieve a good permeability enhancement effect. Increasing the jet pressure can solve this problem, but it also places higher demands on underground safety protection and system equipment. To improve the pressure relief and permeability enhancement effect, some scholars have proposed abrasive jet slotting pressure relief technology. Abrasive jetting combines the advantages of jet impact and abrasive erosion, and can effectively break hard coal seams under low jet pressure. Under the same jet pressure, the slotting speed of abrasive jetting can be increased by 40%, and the slotting depth can be increased by about 60%. Commonly used abrasive jetting technologies are divided into abrasive water jetting and abrasive air jetting. Using air to accelerate abrasive particles can save energy and reduce consumption while avoiding the "water lock" effect that inhibits gas desorption. Abrasive air jets have broad application prospects in decompression and permeability enhancement in hard or deep coal seams. However, when using abrasive air jets for slotting permeability enhancement, there are problems such as high abrasive consumption, difficulty in disposing of waste abrasive, and large amounts of dust. Ice particle air jets were developed against this background. Water freezes into ice particles at low temperatures, which have a certain strength and hardness and can be used as abrasives. After the ice particle air jet acts on coal and rock, the melting of the ice particles also plays a role in dust suppression and cooling.

[0004] To achieve rapid ice particle preparation and integrated jetting, patent CN201910260239.5 discloses "a tunneling machine for rock breaking using liquid nitrogen and ice particle jets", and patent CN202210090921.6 discloses "an instant ice particle preparation and utilization device and jetting method". However, when performing coal breaking and permeability enhancement, due to the excessive length of the drill rod, the ice particles melt during transport within the drill rod, leading to adhesion and blockage of the drill rod outlet. In addition, the ice particles are accelerated to the top of the borehole by being driven by water or air, which results in jet energy loss and is not conducive to achieving coal body breaking. Summary of the Invention

[0005] The purpose of this invention is to provide a device and method for instant ice particle preparation and ice particle air jet kerfing and permeability enhancement. This method, based on traditional drilling equipment, replaces the drill rod with a double-layer drill rod, and installs an integrated ice particle self-generating and drilling / cutting device between the double-layer drill rod and the drill bit. This device is based on the principle of cooling and accelerating high-pressure air through a Laval nozzle, rapidly preparing ice particles at the front end of the drill rod to form a continuous and stable ice particle air jet, thereby achieving coal body crushing.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A device for instant ice particle preparation and ice particle air jet kerfing and penetration enhancement includes an air source pipeline, a water source pipeline, a double-layer drill rod, and a directional drilling rig. The air source pipeline is connected to the inner layer of the double-layer drill rod via a water tail inlet one, and the water source pipeline is connected to the outer layer of the double-layer drill rod via a water tail inlet two. The outer and inner drill rods are fixedly connected by a partition. The front end of the double-layer drill rod is equipped with an integrated ice particle self-generation and drilling / cutting component, and the front end of the integrated ice particle self-generation and drilling / cutting component is equipped with a drill bit and is open to... The integrated ice particle self-generating and drilling / cutting assembly, connected by threads, includes an inner layer pipeline and an outer layer pipeline. The inner layer drill rod is connected to the inner layer pipeline, and the outer layer drill rod is connected to the outer layer pipeline. The outer layer pipeline is solid except at the connection points. Two fixing blocks are symmetrically arranged on the upper and lower inner walls of the inner layer pipeline. Each fixing block has a spring, and a slider is located at the end of the spring. A central passage is located at the center of the slider. A circular plate is located at the front end of the slider. The circular plate has a boss around its circumference and a hollow cavity at its center. A circular plate is located inside the inner layer of the front end of the tube. The circumference of the circular plate has a side cavity that matches the boss. When the spring is in its natural state, the distance between the first and second circular plates is less than the maximum deformation of the spring. The front end of the slider has two side passages, one above and one below. The outer layer of the tube at the location has a first Laval nozzle at the rear end and a second Laval nozzle at the front end. The Laval nozzles on the same side are connected by a spiral channel. When the first and second circular plates are in contact, the side passages are connected to the second Laval nozzles, and the first Laval nozzles are connected to the inner layer of the tube. The rear end of the outer layer of the tube also has a transverse tube connected to the spiral. The inlet of the transverse tube has an atomizing nozzle, and the second Laval nozzle has a straight tube. The outlet of the straight tube is located on the outer wall of the outer layer of the tube. The spiral tube and the straight tube are coated with an anti-adhesion coating to prevent the formed ice particles from adhering to the tube wall. The number of turns of the spiral tube can be designed according to the gas velocity to ensure that the atomized droplets can be cooled sufficiently.

[0007] Furthermore, the slider is cylindrical, and its outer diameter matches that of the inner pipeline.

[0008] Furthermore, the gas source pipeline includes a gas pump, a high-pressure gas storage tank connected to the gas pump, a valve and a pressure gauge on the outlet pipeline of the high-pressure gas storage tank, and the gas outlet pipeline is connected to the water tail inlet.

[0009] Furthermore, the water source pipeline includes a water tank, a high-pressure water pump connected to the outlet of the water tank, and the outlet pipeline of the high-pressure water pump is connected to the inlet of the water tail. The outlet pipeline is also equipped with a valve and a pressure gauge. When drilling, the outlet pipeline of the high-pressure water pump is connected to the inlet of the water tail.

[0010] A method for enhancing the permeability of an instant ice pellet preparation and ice pellet air jet slit-cutting device includes the following steps: S1. Add water to the water tank, connect the high-pressure water pump to the water tail inlet 1 using a high-pressure hose, connect the water tail to the double-layer drill rod, and install the ice particle self-generating and drilling-cutting integrated component between the drill bit and the double-layer drill rod. Turn on the high-pressure water pump and directional drilling machine, set the water pressure to 1MPa, and start drilling. Since the water pressure is low at this time, it is not enough to push the slider forward. At this time, the high-pressure water flows through the middle passage of the slider, the hollow cavity of the first circular plate, and the side cavity of the second circular plate in sequence, and reaches the inside of the drill bit. The water jet is sprayed out through the drill bit nozzle to cool down and reduce dust. S2. After drilling is completed, turn off the directional drilling rig and the high-pressure water pump, disconnect the high-pressure water pump and the water tail, and let the water remaining in the inner drill rod flow out. S3. After the inner drill pipe stops producing water, use a high-pressure hose to connect the air pump to the water tail inlet 1 and the high-pressure water pump to the water tail inlet 2. Turn on the air pump. When the gas pressure in the storage tank reaches 15MPa, open the valve to introduce high-pressure air into the inner drill pipe. Control the high-pressure air release pressure to 4MPa using a pressure gauge. Turn on the high-pressure water pump to allow high-pressure water to enter the outer drill pipe. Set the water pressure to 2MPa. The high-pressure air pushes the slider forward. The slider drives the first circular plate forward until the boss of the first circular plate is inserted into the side cavity of the second circular plate and sealed. The hollow cavity of the first circular plate and the second circular plate are fitted and sealed, thereby opening the first Laval nozzle and connecting the passages on both sides of the slider with the second Laval nozzle. S4. The directional drilling rig drives the double-layer drill rod to rotate and gradually withdraws from the borehole. The ice particle air jet formed by the self-generated ice particles and the integrated drilling and cutting components destroys the coal body to achieve the effect of pressure relief and permeability enhancement. S5. In actual use, an ice-generating and drilling-cutting integrated component can be installed at the end of each drill rod. When retracting the drill rod, it can ensure that a cutting operation is performed once for each drill rod that is retracted. The cutting time is 20 minutes until the coal seam is cut. S6. After the cutting operation is completed, first turn off the high-pressure water pump. After the water in the double-layer drill rod is drained, turn off the air pump and withdraw all the double-layer drill rods to complete the coal breaking and permeability enhancement work. At this time, the slider moves backward under the action of the spring, causing the first circular plate and the second circular plate to separate. S7. Adjust the angle of the directional drilling rig, and repeat steps S1-S6 at the new drilling location.

[0011] The advantages of this invention are: 1. The ice particles prepared in this invention have high hardness. The hardness of ice particles increases with decreasing temperature. At 0℃, the hardness of ice is approximately 1-2, according to the Mohs hardness scale. When the temperature drops to -15℃, the hardness increases to 2-3; at -40℃, the hardness can reach 4; further decreasing to -50℃, the hardness can reach 6; under extreme low-temperature conditions, such as -70℃, the Mohs hardness of ice can even reach 7. At this point, its hardness exceeds that of granite, resulting in high impact force. It can replace abrasives to effectively improve the permeability of coal seams by slotting and increasing the permeability of coal seams of different hardness. 2. The ice particle air jet of the present invention, as a type of abrasive air jet, uses ice particles instead of traditional abrasives, eliminating the need to actively add solid abrasives, and enabling continuous preparation of ice particles, thus avoiding the problem of continuous abrasive supply in traditional abrasive jets. 3. Ice pellet air jet uses water and air as raw materials to form ice pellets. After the ice pellets break up the coal body, they melt into water, effectively reducing dust at the working face and avoiding the problem of abrasives not being able to be recycled, thus saving costs. 4. The water tail and double-layer drill rod used in this invention realize the independent transportation of high-pressure air and high-pressure water, and rapidly condense the atomized droplets into ice in the ice particle self-generation and drilling-cutting integrated component, providing a new way for the rapid preparation of ice particles. Moreover, the prepared ice particles can be quickly sprayed out with high-speed air, avoiding the reduction of ice particle hardness, melting and sticking, and ensuring the jet effect. 5. This invention is based on the principle of cooling and accelerating high-pressure gas through a Laval nozzle to achieve the preparation and acceleration of ice particles. This process does not require refrigerants or other refrigeration materials, which simplifies the cooling and acceleration process and has a significant cooling and acceleration effect. 6. This invention utilizes the pressure difference between high-pressure water and high-pressure air, and adopts a high-low pressure conversion method to achieve different flow directions for high-pressure water and high-pressure air. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the slit cutting operation structure of the present invention.

[0013] Figure 2 This is a cross-sectional view of the integrated ice particle self-generating and drilling / cutting component in this invention.

[0014] Figure 3 This is the present invention. Figure 2 Top view of circular plate one and circular plate two.

[0015] Figure 4 This is a schematic diagram of the double-layer drill rod of the present invention.

[0016] Figure 5 This is a cross-sectional view of the double-layer drill pipe of the present invention. Detailed Implementation

[0017] As shown in the figure, an instant ice particle preparation and ice particle air jet slit-cutting penetration enhancement device includes an integrated ice particle self-generation and drilling-cutting component 10, a double-layer drill rod 9, a directional drilling rig 8, a water tail 7, a pneumatic pump 1, a high-pressure gas storage tank 2, a valve 3, a pressure gauge 4, a water tank 5, and a high-pressure water pump 6. The double-layer drill rod 9 includes an inner drill rod 30 and an outer drill rod 31, both of which can withstand high pressure. The inner drill rod 30 and the outer drill rod 31 are connected by a partition 33. The water tail 7 includes an inlet 1 71 and an inlet 2 72, which allow two different fluids to enter the double-layer drill rod 9 independently. The front end of the double-layer drill rod is equipped with an integrated ice particle self-generating and drilling / cutting component. The front end of the integrated ice particle self-generating and drilling / cutting component is equipped with a drill bit 24 and is connected by threads. One end of the double-layer drill rod is equipped with an internal thread 29 and the other end is equipped with an external thread 32. Multiple rods can be connected as needed. An integrated ice particle self-generating and drilling / cutting component can also be set between every two double-layer drill rods according to the cutting effect. The front end of the drill bit is equipped with a nozzle for spraying water during drilling.

[0018] The integrated ice particle self-generating and drilling / cutting component 10 mainly includes an inner layer pipeline 11, an outer layer pipeline 12, a fixing block 13, a spring 14, an atomizing nozzle 15, a first Laval nozzle 16, a spiral tube 17, a second Laval nozzle 18, a straight tube 19, a first circular plate 20, a second circular plate 22, a drill bit 24, and a slider 25. The inner layer drill rod is connected to the inner layer pipeline, and the outer layer drill rod is connected to the outer layer pipeline. The outer layer pipeline is solid except at the connection points. Two fixing blocks are symmetrically arranged on the upper and lower sides of the inner wall of the inner layer pipeline. Each fixing block is equipped with a spring, and a slider is located at the end of the spring. The slider has a central passage. The front end of the block has a circular plate 1 with a boss on its circumference and a hollow cavity at its center. Inside the inner tube at the front end of circular plate 1 is a circular plate 2 with a side cavity matching the boss on its circumference. When the spring is in its natural state, the distance between circular plate 1 and circular plate 2 is less than the maximum deformation of the spring. The front end of the slider has two side passages, one above the other. At the location of the block, the outer tube has a first Laval nozzle at the rear end and a second Laval nozzle at the front end. The Laval nozzles on the same side are connected by a spiral channel. When circular plate 1 contacts circular plate 2, the side passages connect with the second Laval nozzle. The nozzles are connected; the first Laval nozzle is connected to the inner pipeline, and the rear end of the outer pipeline is also provided with a transverse pipe connected to the spiral. An atomizing nozzle is located at the inlet of the transverse pipe, and a straight pipe is located at the second Laval nozzle, with the outlet of the straight pipe located on the outer wall of the outer pipeline. The atomizing nozzle 15 can spray atomized droplets of a fixed particle size. The first Laval nozzle 16 and the second Laval nozzle 18 each have two nozzles, symmetrically distributed. The first circular plate 20 has a boss 21 and a hollow cavity 28, connected to the slider 25. The second circular plate 22 has a side cavity 23, and the dimensions of the side cavity 23 and the boss 21 are... The components are consistent and fixed in the inner tube 11; the fixing block 13 is connected to the slider 25 by the spring 14; the middle of the slider 25 is the middle passage 26, which allows the fluid to pass through and enter the hollow cavity 28 of the circular plate 20; the two sides of the inside of the slider 25 are the two side passages 27, which are symmetrically distributed. When the slider 25 slides forward, the two side passages of the slider 25 will connect with the second Laval nozzle 18; the spiral tube 17 and the straight tube 19 are coated with anti-adhesion coating to prevent the formed ice particles from adhering to the tube wall, and the number of turns of the spiral tube 17 can be designed according to the gas velocity to ensure that the atomized droplets can be sufficiently cooled.

[0019] During drilling operations, the high-pressure water pump 6 is connected to the inner drill rod 30 through the water tail inlet 71. The high-pressure water flows from the inner drill rod 30 through the ice particle self-generating and drilling-cutting integrated component 10. Since the water pressure is relatively low at this time, it is insufficient to push the slider 25 forward. At this time, the high-pressure water flows sequentially through the middle passage 26 of the slider, the hollow cavity 28 of the circular plate 20, and the side cavity 23 of the circular plate 22, reaching the inside of the drill bit 24. The water jet is sprayed out to cool down and reduce dust.

[0020] During the kerf cutting operation, the pneumatic pump 1 is connected to the inner drill rod 30 through the water tail inlet 71, and the high-pressure water pump 6 is connected to the outer drill rod 31 through the water tail inlet 72. High-pressure air enters the inner pipeline 11, and high-pressure water enters the outer pipeline 12, and is sprayed out by the atomizing nozzle 15. Due to the high pressure of the high-pressure air, it pushes the slider 25 forward, which in turn drives the circular plate 20 forward until the boss 21 of the circular plate 20 is inserted into the side cavity 23 of the circular plate 22 and sealed. The hollow cavity 28 of the circular plate 20 and the circular plate 22 are then sealed together, thereby opening the first Laval nozzle 16 and connecting the passages 27 on both sides of the slider and the second Laval nozzle 18. At this time, the high-pressure air is divided into two streams. The first stream of high-pressure air enters the first Laval nozzle 16, where it is cooled and accelerated. It then mixes with the atomized droplets sprayed from the atomizing nozzle 15, and the mixture is fully mixed in the spiral tube 17 to form ice crystals. The second stream of high-pressure air enters the second set of Laval nozzles 18 through the passages 27 on both sides of the slider. The high-pressure air is cooled and accelerated, and mixes with ice crystals. It is cooled and accelerated in the straight pipe 19 to form an ice particle air jet.

[0021] The specific changes in water and their mechanisms are as follows: The formulas for calculating temperature, pressure, and velocity after high-pressure air passes through a Laval nozzle are as follows: In the formula: T-Laval nozzle inlet temperature; T e - Laval nozzle outlet temperature; k - Adiabatic coefficient, taken as 1.4; M a - Mach number of the Laval nozzle; P e - Laval nozzle outlet gas pressure; P0 - Laval nozzle inlet gas pressure; V out - Laval nozzle outlet gas velocity, m / s; R - gas constant, J / (kg·K), taken as 287; For the first Laval nozzle, the inlet high-pressure gas temperature is set to 300K (27℃), the pressure to 4MPa, and the Mach number to 1.2. According to the above formula, after the high-pressure gas passes through the first Laval nozzle, the outlet gas temperature is 233K (-40℃), the pressure is 1.65MPa, and the velocity is 367.05m / s.

[0022] For the second Laval nozzle, the inlet high-pressure gas temperature is set to 300K (27℃), the pressure to 4MPa, and the Mach number to 2. According to the above formula, when the high-pressure gas passes through the first Laval nozzle, the outlet gas temperature is 166K (-106℃), the pressure is 0.5MPa, and the velocity is 519.6m / s. At this point, the atomized droplets undergo a second acceleration and cooling to form an ice-particle air jet.

[0023] A novel method and apparatus for instant ice particle preparation and ice particle air jet slit-cutting for enhanced transparency, comprising the following steps: (1) Add water to the water tank 5, connect the high-pressure water pump 6 to the water tail inlet 71 using a high-pressure hose, connect the water tail 7 to the double-layer drill rod 9, and install the ice particle self-generating and drilling-cutting integrated assembly 10 between the drill bit 24 and the double-layer drill rod 9. Turn on the high-pressure water pump 6 and the directional drilling machine 8, set the water pressure to 1MPa, and start drilling. Since the water pressure is low at this time, it is not enough to push the slider 25 forward. At this time, the high-pressure water flows through the middle passage 26 of the slider, the hollow cavity 28 of the circular plate 20, and the side cavity 23 of the circular plate 22 in sequence, and reaches the inside of the drill bit 24. The water jet sprays out to cool down and reduce dust.

[0024] (2) After drilling is completed, turn off the directional drilling machine 8 and the high-pressure water pump 6, disconnect the high-pressure water pump 6 and the water tail 7, so that the water remaining in the inner drill rod 30 can flow out.

[0025] (3) When the inner drill pipe 30 stops producing water, use a high-pressure hose to connect the air pump 1 to the water tail inlet 71 and the high-pressure water pump 6 to the water tail inlet 72. Turn on the air pump 1 to allow high-pressure air to enter the high-pressure gas storage tank 2 for storage. When the gas pressure in the storage tank reaches 15MPa, open the valve 3 to introduce high-pressure air into the inner drill pipe 30 and control the high-pressure air release pressure to 4MPa through the pressure gauge 4. Turn on the high-pressure water pump 6 to allow high-pressure water to enter the outer drill pipe 31 and set the water pressure to 2MPa. Due to the high pressure of the high-pressure air, the high-pressure air pushes the slider 25 forward, and the slider 25 drives the circular plate 20 forward until the boss 21 of the circular plate 20 is inserted into the side cavity 23 of the circular plate 22 and sealed. The hollow cavity 28 of the circular plate 20 and the circular plate 22 are fitted and sealed, thereby opening the first set of Laval nozzles 16 and connecting the passages 27 on both sides of the slider and the second Laval nozzle 18.

[0026] (4) The directional drilling rig 8 drives the double-layer drill rod 9 to rotate and gradually withdraw from the borehole. The ice particle air jet formed by the self-generated ice particles and the integrated drilling and cutting component 10 destroys the coal body and achieves the effect of pressure relief and permeability enhancement.

[0027] (5) When retracting the drill, a slit cutting operation is performed for each drill rod that is retracted. The slit cutting time is 20 minutes until the coal seam is completely slit.

[0028] (6) After the cutting operation is completed, first turn off the high-pressure water pump 6. After the water in the double-layer drill rod 9 is drained, turn off the air pump 1 and withdraw all the double-layer drill rods 9 to complete the coal breaking and permeability enhancement work. At this time, the slider 25 moves backward under the action of the spring 14, which drives the first circular plate 20 and the second circular plate 22 to separate.

[0029] (7) Adjust the angle of the directional drilling rig 8 and repeat steps (1)-(6) at the new drilling location.

Claims

1. A device for instant ice particle preparation and ice particle air jet slit-cutting penetration enhancement, characterized in that: The system includes a gas supply pipeline, a water supply pipeline, a double-layer drill rod, and a directional drilling rig. The gas supply pipeline is connected to the inner layer of the double-layer drill rod via a water tail inlet 1, and the water supply pipeline is connected to the outer layer of the double-layer drill rod via a water tail inlet 2. The outer and inner layers of the drill rod are fixedly connected by a partition. The front end of the double-layer drill rod is equipped with an integrated ice particle self-generating and drilling / cutting assembly. The front end of this assembly is equipped with a drill bit connected by threads. The integrated ice particle self-generating and drilling / cutting assembly includes an inner pipeline and an outer pipeline. The inner drill rod is connected to the inner pipeline, and the outer drill rod is connected to the outer pipeline. The outer pipeline is solid except at the connection points. The inner pipeline has two symmetrically arranged fixing blocks on its inner wall, each with a spring. A slider is located at the end of the spring, and a central passage is located at the center of the slider. A circular plate is located at the front end of the slider, and a boss is located on its circumference. A hollow cavity is provided in the center. A second circular plate is provided in the inner tube at the front end of the first circular plate. The second circular plate has a side cavity on its circumference that matches the boss. When the spring is in its natural state, the distance between the first and second circular plates is less than the maximum deformation of the spring. The front end of the slider has two side passages, one above and one below. The rear end of the outer tube at the slider position is provided with a first Laval nozzle at the top and one below. The front end of the outer tube is provided with a second Laval nozzle at the top and one below. The Laval nozzles on the same side on the upper and lower sides of the outer tube are connected by a spiral channel. When the first circular plate and the second circular plate are in contact, the side passage is connected to the second Laval nozzle, and the first Laval nozzle is connected to the inner tube. The rear end of the outer tube is also provided with a transverse tube connected to the spiral. The inlet of the transverse tube is provided with an atomizing nozzle. A straight tube is provided at the second Laval nozzle. The outlet of the straight tube is located on the outer wall of the outer tube.

2. The instant ice particle preparation and ice particle air jet slit-cutting and penetration-enhancing device as described in claim 1, characterized in that: The slider is cylindrical, and its outer diameter matches that of the inner pipeline.

3. The instant ice particle preparation and ice particle air jet slit-cutting and penetration-enhancing device as described in claim 2, characterized in that: The gas source pipeline includes a gas pump, a high-pressure gas storage tank connected to the gas pump, a valve and a pressure gauge on the outlet pipeline of the high-pressure gas storage tank, and the gas outlet pipeline is connected to the water tail inlet.

4. The instant ice particle preparation and ice particle air jet slit-cutting and penetration-enhancing device as described in claim 3, characterized in that: The water source pipeline includes a water tank, a high-pressure water pump connected to the outlet of the water tank, and the outlet pipeline of the high-pressure water pump is connected to the inlet of the water tail. The outlet pipeline is also equipped with a valve and a pressure gauge. When drilling, the outlet pipeline of the high-pressure water pump is connected to the inlet of the water tail.

5. The method for enhancing the transparency of ice particles in real-time preparation and the ice particle air jet slit-cutting anti-reflection device as described in any one of claims 1-4, characterized in that, Includes the following steps: S1. Add water to the water tank, connect the high-pressure water pump to the water tail inlet 1 using a high-pressure hose, connect the water tail to the double-layer drill rod, and install the ice particle self-generating and drilling-cutting integrated component between the drill bit and the double-layer drill rod. Turn on the high-pressure water pump and directional drilling machine, set the water pressure to 1MPa, and start drilling. S2. After drilling is completed, turn off the directional drilling rig and the high-pressure water pump, disconnect the high-pressure water pump and the water tail, and let the water remaining in the inner drill rod flow out. S3. After the inner drill pipe stops producing water, use a high-pressure hose to connect the air pump to the water tail inlet 1 and the high-pressure water pump to the water tail inlet 2. Turn on the air pump. When the gas pressure in the storage tank reaches 15MPa, open the valve to introduce high-pressure air into the inner drill pipe. Control the high-pressure air release pressure to 4MPa using a pressure gauge. Turn on the high-pressure water pump to allow high-pressure water to enter the outer drill pipe. Set the water pressure to 2MPa. The high-pressure air pushes the slider forward. The slider drives the first circular plate forward until the boss of the first circular plate is inserted into the side cavity of the second circular plate and sealed. The hollow cavity of the first circular plate and the second circular plate are fitted and sealed, thereby opening the first Laval nozzle and connecting the passages on both sides of the slider with the second Laval nozzle. S4. The directional drilling rig drives the double-layer drill rod to rotate and gradually withdraws from the borehole. The ice particle air jet formed by the self-generated ice particles and the integrated drilling and cutting components destroys the coal body to achieve the effect of pressure relief and permeability enhancement. S5. In actual use, each drill rod end is equipped with an ice particle self-generating and drilling-cutting integrated component. When retracting the drill rod, it can ensure that a cutting operation is performed once for each drill rod retracted. The cutting time is 20 minutes until the coal seam cutting is completed. S6. After the cutting operation is completed, first turn off the high-pressure water pump. After the water in the double-layer drill rod is drained, turn off the air pump and withdraw all the double-layer drill rods to complete the coal breaking and permeability enhancement work. At this time, the slider moves backward under the action of the spring, causing the first circular plate and the second circular plate to separate. S7. Adjust the angle of the directional drilling rig, and repeat steps S1-S6 at the new drilling location.

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