A device for fracturing rocks by expanding liquid oxygen gas

Abstract

This invention provides a liquid oxygen gas expansion rock-fracturing device, comprising a fracturing component. The fracturing component includes a PE rubber tube, two transparent tape sleeves, an inflation tube, a conductive connecting wire, two sealing elements, several annular combustion aids, a moisture-proof membrane, a thermal insulation layer, and several ignition plates. The thermal insulation layer is disposed on the inner wall of the PE rubber tube, and the moisture-proof membrane is disposed on the inner wall of the thermal insulation layer. This invention transmits liquid oxygen to the inflation tube through a filling and cutting component. The liquid oxygen in the inflation tube is sprayed through a V-shaped through-hole onto several annular combustion aids. The moisture-proof membrane is used for moisture protection to prevent the annular combustion aids from becoming damp and affecting their use. The liquid oxygen fracturing tube is not a prohibited item in production. Because it is made of common materials, the cost is very low, and its light weight facilitates construction and operation. Liquid oxygen has a larger expansion coefficient than carbon dioxide, resulting in stronger working force and better rock-breaking effect.

Description

Technical Field

[0001] This utility model relates to the field of expansion-induced fracturing technology, and in particular to a liquid oxygen gas expansion-induced fracturing device for rocks. Background Technology

[0002] In mining, geological exploration, subway and tunnel engineering, municipal engineering, underwater engineering, and emergency rescue, gas blasting technology is used. In areas with rock, a rock drill is used to drill holes, and then a fracturing tube is placed in the rock mass to be blasted. The liquid or solid material filled in the fracturing tube expands to generate high-pressure gas, which is used to break the rock into fragments, even if the rock is hard. This fracturing equipment is simple to manufacture, safe, environmentally friendly, and inexpensive.

[0003] Existing fracturing techniques using carbon dioxide and liquid oxygen utilize the instantaneous high temperature generated by electronic ignition to instantly transform liquid gas into gas. Both carbon dioxide and liquid oxygen exhibit rapid expansion during the liquid-to-gas transition, generating high-pressure airflow that, through rapid collisions between airflows, instantly tears and loosens the rock, achieving the purpose of rock breaking.

[0004] The carbon dioxide fracturing tube requires a steel pipe as a sealed container. The built-in ignition device contains a solid ignition tube filled with powder. The powder is composed of potassium perchlorate, salicylic acid, and ammonium oxalate mixed in a scientific formula of 67%, 16%, and 17%, respectively. Potassium perchlorate is a component of fireworks and explosives, and is classified as a hazardous chemical that is easily explosive, thus falling under the control of public security or emergency departments.

[0005] Carbon dioxide fracturing devices are more expensive because they use steel pipes as fracturing tube components. They are also cumbersome to operate and are prone to damage due to frequent contact with rocks. The sealing performance, steel pipe material, and manufacturing all require high standards, resulting in higher costs. Furthermore, the presence of high-pressure gas inside the steel pipes on the construction site poses a higher risk. Therefore, a liquid oxygen gas expansion rock fracturing device is proposed. Utility Model Content

[0006] In view of this, the present invention provides a liquid oxygen gas expansion and rock fracturing device to solve or alleviate the technical problems existing in the prior art, and at least provides a beneficial option.

[0007] The technical solution of this utility model embodiment is implemented as follows: A liquid oxygen gas expansion rock fracturing device includes a fracturing component, which includes a PE rubber tube, two transparent adhesive tape sleeves, an inflation tube, a conductive connecting wire, two sealing elements, several annular combustion aids, a moisture-proof membrane, a thermal insulation layer, and several ignition plates. The thermal insulation layer is disposed on the inner wall of the PE rubber tube, and the moisture-proof membrane is disposed on the inner wall of the thermal insulation layer. Several annular combustion aids are linearly arrayed on the inner wall of the moisture-proof membrane, and the outer wall of the inflation tube is attached to the inner wall of the several annular combustion aids. One end of the inflation tube is sealed, and V-shaped through holes are uniformly formed on the outer wall of the inflation tube. Each of the ignition elements is connected in series to the conductive connecting line via a wire, and the conductive connecting line and the ignition elements are all attached to the outer wall of the annular combustion aids. The conductive connecting line and the ignition elements are also attached to the inner wall of the moisture-proof membrane. Two sealing elements are symmetrically arranged on the inner wall of the PE rubber tube, and two transparent tape sleeves are symmetrically arranged on the outer wall of the PE rubber tube. The transparent tape sleeves are made of wrapped tape. One end of the inflation tube passes through one of the sealing elements and one of the transparent tape sleeves in sequence and is provided with a filling cut-off assembly. One end of the conductive connecting line passes through one of the sealing elements and one of the transparent tape sleeves in sequence.

[0008] In some embodiments, the filling and cutting-off assembly includes a connecting seat, an externally threaded cylinder, an injection pipe, a conical sealing block, a limiting rod, a first spring, a first solenoid valve, a three-way pipe, two second solenoid valves, and a plurality of threaded fixing mechanisms. One end of the externally threaded cylinder has a first mounting groove, and the inflation pipe is disposed on the inner wall of the first mounting groove. The inner wall of the first mounting groove has a conical groove, and the inner wall of the conical groove has a first movable groove. The other end of the externally threaded cylinder has uniformly distributed arc-shaped through holes, and a plurality of the arc-shaped through holes are connected to the conical groove. The outer wall of the conical sealing block is provided with a conical rubber sleeve, and the outer wall of the conical rubber sleeve fits against the conical groove, with the conical rubber sleeve and the conical groove having an interference fit. The limiting rod passes through the conical groove and is disposed on one side of the conical sealing block. One end of the first spring is disposed on the inner wall of the first movable through groove, and the other end of the first spring is disposed on one side of the limiting rod; a second mounting through groove is provided on one side of the connecting seat, and the injection pipe is disposed on the inner wall of the second mounting through groove; a cavity is provided inside the connecting seat, and the bottom end of the three-way pipe passes through the injection pipe, and the injection pipe and the three-way pipe are fixedly connected; one end of the three-way pipe passes through the connecting seat, and one end of the three-way pipe is connected to the inside of the cavity, and the three-way pipe is fixedly connected to the cavity; two second solenoid valves are symmetrically disposed at both ends of the three-way pipe, and the first solenoid valve is disposed on the outer wall of the injection pipe; a plurality of threaded fixing mechanisms are arranged in a ring array on the connecting seat, the plurality of threaded fixing mechanisms form a threaded channel, and the plurality of threaded fixing mechanisms are threadedly connected to the external threaded column.

[0009] In some embodiments, the threaded fixing mechanism includes a plurality of pistons, a plurality of connecting rods, a plurality of rubber sealing rings, an arc-shaped threaded plate, and a plurality of second springs. The inner wall of the cavity is uniformly provided with second movable through grooves, and the inner wall of the second movable through grooves is provided with circular through holes. The outer walls of the plurality of pistons are fitted against the inner walls of the corresponding second movable through grooves, and the plurality of rubber sealing rings are embedded in the outer walls of the corresponding pistons, and the outer walls of the plurality of rubber sealing rings are fitted against the inner walls of the corresponding second movable through grooves. One end of each of the plurality of connecting rods passes through the corresponding circular through hole and is disposed on one side of the corresponding piston. The other end of each of the plurality of connecting rods is uniformly disposed on one side of the arc-shaped threaded plate, and the other side of the arc-shaped threaded plate is threadedly connected to the outer wall of the externally threaded column. A plurality of second springs are sleeved on the corresponding connecting rods, one end of each of the plurality of second springs is disposed on one side of the corresponding piston, and the other end of each of the plurality of second springs is disposed on the inner wall of the corresponding cavity.

[0010] In some embodiments, an annular rubber pad is provided on the inner wall of the second mounting groove, and the annular rubber pad is in contact with the external threaded column.

[0011] In some embodiments, the annular combustion aid is made of paper towels.

[0012] In some embodiments, the inflation tube is made of aluminum or PE plastic.

[0013] In some embodiments, the moisture-proof film is made of transparent tape.

[0014] In some embodiments, the seal is made of structural adhesive or sponge.

[0015] The present invention has the following advantages due to the adoption of the above technical solution: 0. This utility model uses a filling and cutting component to transfer liquid oxygen into the filling pipe. The liquid oxygen in the filling pipe is sprayed out through a V-shaped through-hole onto several annular combustion aids. The moisture-proof membrane is used for moisture protection to prevent the annular combustion aids from getting damp and affecting their use. The liquid oxygen fracturing pipe is not a prohibited item in production. Because it is made of common materials, the cost is very low. It is very lightweight and easy to operate. The expansion coefficient of liquid oxygen is greater than that of carbon dioxide, so it has a stronger working force and a better rock-breaking effect.

[0016] Second, this utility model enables operators to simultaneously cut off multiple injection tubes and inflation tubes from a location far from the blast point by using conductive connecting wires, thereby improving operational safety.

[0017] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a structural diagram of the present invention; Figure 2 This is a front view structural diagram of the present invention; Figure 3 This utility model Figure 2 AA side section structural diagram; Figure 4 This utility model Figure 3 Enlarged structural diagram of region B; Figure 5 This utility model Figure 3 Enlarged structural diagram of region C; Figure 6 This is a structural diagram showing the connection between the conductive connecting wire and the annular combustion-supporting material of this utility model; Figure 7 This utility model Figure 6 Enlarged structural diagram of region D; Figure 8 This is a structural diagram of the filling and cutting assembly of this utility model; Figure 9 This utility model Figure 8 Internal structure diagram; Figure 10 This utility model Figure 9 Enlarged structural diagram of region E; Figure 11 This utility model Figure 9 Enlarged structural diagram of region F.

[0020] Reference numerals: 1. Rupture component; 2. Filling and cutting component; 3. V-shaped through hole; 4. First mounting slot; 5. Conical slot; 6. First movable slot; 7. Arc-shaped through hole; 8. Second mounting slot; 9. Annular rubber pad; 10. PE rubber tube; 11. Transparent tape sleeve; 12. Inflation tube; 13. Conductive connecting wire; 14. Seal; 15. Annular combustion aid; 16. Moisture-proof membrane; 17. Thermal insulation layer; 18. Ignition plate; 20. Continuous 21. Connector; 22. Externally threaded cylinder; 23. Injection pipe; 24. Conical sealing block; 25. Limiting rod; 26. First spring; 27. First solenoid valve; 28. T-connector; 29. ​​Second solenoid valve; 20. Threaded fixing mechanism; 31. Conical rubber sleeve; 32. Cavity; 33. Second movable through groove; 290. Circular through hole; 291. Piston; 292. Connecting rod; 293. Rubber sealing ring; 294. Arc-shaped threaded plate; 295. Second spring. Detailed Implementation

[0021] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0022] It is important to note that terms such as "first," "second," "symmetric," "array," "set in," and "set with" are used only to distinguish between descriptive and positional descriptions and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified with terms such as "first" or "symmetric" may explicitly or implicitly include one or more of that feature; similarly, when the quantity of certain features is not limited by words such as "two" or "three," it should be noted that such features also explicitly or implicitly include one or more features.

[0023] In this invention, unless otherwise explicitly specified and limited, terms such as "installation," "connection," and "fixation" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection, a direct connection, a welding connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the accompanying drawings and specific circumstances.

[0024] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0025] like Figures 1-11 As shown, this utility model embodiment provides a liquid oxygen gas expansion rock fracturing device, including a fracturing component 1. The fracturing component 1 includes a PE rubber tube 10, two transparent tape sleeves 11, an inflation tube 12, a conductive connecting wire 13, two sealing elements 14, several annular combustion aids 15, a moisture-proof membrane 16, a thermal insulation layer 17, and several ignition plates 18. The thermal insulation layer 17 is disposed on the inner wall of the PE rubber tube 10, and the moisture-proof membrane 16 is disposed on the inner wall of the thermal insulation layer 17. Several annular combustion aids 15 are linearly arrayed on the inner wall of the moisture-proof membrane 16, and the outer wall of the inflation tube 12 is attached to the inner wall of the several annular combustion aids 15. One end of the inflation tube 12 is sealed, and V-shaped openings are uniformly formed on the outer wall of the inflation tube 12. A through hole 3 is formed, and several ignition pieces 18 are connected in series to a conductive connecting line 13 through wires. The conductive connecting line 13 and the several ignition pieces 18 are attached to the outer wall of several annular combustion aids 15. The conductive connecting line 13 and the several ignition pieces 18 are attached to the inner wall of the moisture-proof membrane 16. Two sealing pieces 14 are symmetrically arranged on the inner wall of the PE rubber tube 10, and two transparent tape sleeves 11 are symmetrically arranged on the outer wall of the PE rubber tube 10. The transparent tape sleeves 11 are made of tape. One end of the inflation tube 12 passes through one of the sealing pieces 14 and one of the transparent tape sleeves 11 in sequence and is provided with an inflation cut-off component 2. One end of the conductive connecting line 13 passes through one of the sealing pieces 14 and one of the transparent tape sleeves 11 in sequence.

[0026] In this embodiment, specifically, the filling and cutting assembly 2 includes a connecting seat 20, an externally threaded cylinder 21, an injection pipe 22, a conical sealing block 23, a limiting rod 24, a first spring 25, a first solenoid valve 26, a three-way pipe 27, two second solenoid valves 28, and several threaded fixing mechanisms 29. One end of the externally threaded cylinder 21 has a first mounting groove 4, and the inflation pipe 12 is disposed on the inner wall of the first mounting groove 4. The inner wall of the first mounting groove 4 has a conical groove 5, and the inner wall of the conical groove 5 has a first movable groove 6. The other end of the externally threaded cylinder 21 is uniformly... An arc-shaped through hole 7 is provided, and several arc-shaped through holes 7 are connected to a conical through groove 5. A conical rubber sleeve 30 is provided on the outer wall of the conical sealing block 23, and the outer wall of the conical rubber sleeve 30 fits against the conical through groove 5. The conical rubber sleeve 30 and the conical through groove 5 are interference-fitted. A limiting rod 24 passes through the conical through groove 5 and is provided on one side of the conical sealing block 23. One end of the first spring 25 is provided on the inner wall of the first movable through groove 6, and the other end of the first spring 25 is provided on one side of the limiting rod 24. A second mounting through groove 8 is provided on one side of the connecting seat 20, and an injection pipe 22 is provided in the second mounting through groove 8. The inner wall of the through groove 8 has a cavity 31 inside the connecting seat 20. The bottom end of the three-way pipe 27 passes through the injection pipe 22, and the injection pipe 22 and the three-way pipe 27 are fixedly connected. One end of the three-way pipe 27 passes through the connecting seat 20 and is connected to the inside of the cavity 31. The three-way pipe 27 is fixedly connected to the cavity 31. Two second solenoid valves 28 are symmetrically arranged at both ends of the three-way pipe 27. The first solenoid valve 26 is arranged on the outer wall of the injection pipe 22. Several threaded fixing mechanisms 29 are arranged in a ring array on the connecting seat 20, and the several threaded fixing mechanisms 29 form a threaded through groove. The system is configured such that several threaded fixing mechanisms 29 are threadedly connected to the external threaded cylinder 21. Through the above settings, relevant personnel control the closure of the first solenoid valve 26 while opening one of the second solenoid valves 28. Liquid oxygen is then transmitted to the three-way pipe 27, and the liquid oxygen in the three-way pipe 27 is transmitted to the cavity 31. After the pressure in the cavity 31 increases, the liquid oxygen compresses the several fixing mechanisms 29 to move, and the several fixing mechanisms 29 form a threaded channel. Then, relevant personnel rotate the external threaded cylinder 21 in the arc-shaped threaded plate 293 to fix the external threaded cylinder 21 to the connecting seat 20.

[0027] In this embodiment, specifically, the threaded fixing mechanism 29 includes a plurality of pistons 290, a plurality of connecting rods 291, a plurality of rubber sealing rings 292, an arc-shaped threaded plate 293, and a plurality of second springs 294. The inner wall of the cavity 31 is uniformly provided with second movable through grooves 32, and the inner wall of the second movable through grooves 32 is provided with circular through holes 33. The outer walls of the plurality of pistons 290 are fitted against the inner walls of the corresponding second movable through grooves 32, and the plurality of rubber sealing rings 292 are embedded in the outer walls of the corresponding pistons 290. The outer walls of the plurality of rubber sealing rings 292 are fitted against the inner walls of the corresponding second movable through grooves 32. One end of each connecting rod 291 passes through the corresponding circular through hole 33 and is disposed on one side of the corresponding piston 290. The other end of each connecting rod 291 is uniformly disposed on the arc-shaped threaded plate 294. On one side of the 3, and on the other side of the arc-shaped threaded plate 293, it is threaded to the outer wall of the external threaded column 21. Several second springs 294 are sleeved on the corresponding connecting rod 291. One end of several second springs 294 is set on one side of the corresponding piston 290, and the other end of several second springs 294 is set on the inner wall of the corresponding cavity 31. The piston 290 moves by squeezing the piston 290 with liquid oxygen. The piston 290 squeezes the second spring 294 and deforms it, while driving the connecting rod 291 to move. The connecting rod 291 drives the arc-shaped threaded plate 293 to move, so that the arc-shaped threaded plates 293 on several threaded fixing mechanisms 29 form a threaded channel. After that, the relevant personnel rotate the external threaded column 21 in the arc-shaped threaded plate 293 to fix the external threaded column 21 to the connecting seat 20.

[0028] In this embodiment, specifically, the inner wall of the second mounting groove 8 is provided with an annular rubber pad 9, which fits against the external threaded column 21. The annular rubber pad 9 is provided to enhance the sealing between the external threaded column 21 and the connecting seat 20.

[0029] In this embodiment, the annular combustion aid 15 is made of paper towel. With the above-mentioned arrangement, the paper towel can quickly absorb liquid oxygen and thus provide rapid flame retardancy.

[0030] In this embodiment, the inflation tube 12 is made of aluminum or PE plastic. The aluminum or PE plastic tube is made of flexible material, which makes it easy for people to fold and transport it.

[0031] In this embodiment, the moisture-proof film 16 is made of transparent tape. By using the transparent tape, the annular combustion aid 15, the conductive connecting wire 13 and the ignition plate 18 can be sealed and fixed, which can effectively prevent the annular combustion aid 15 from becoming damp and failing.

[0032] In this embodiment, the sealing element 14 is made of structural adhesive or sponge. The structural adhesive or sponge is used to seal the PE rubber tube 10 to prevent liquid oxygen leakage.

[0033] In this embodiment, specifically, the thermal insulation layer 17 can reduce heat transfer between the PE rubber tube 10 and the annular combustion-supporting material 15.

[0034] In this embodiment, specifically, carbon dioxide is an inert gas and is non-toxic like oxygen. However, the gases released after liquid oxygen fracturing are mainly oxygen, carbon dioxide, water, and fertilizer (residues after rock breaking). Compared with the carbon dioxide, which releases carbon dioxide, oxygen, and potassium perchlorate residues after carbon dioxide fracturing, liquid oxygen fracturing is more environmentally friendly in terms of emissions.

[0035] In operation, the present invention works as follows: While the relevant personnel close the first solenoid valve 26, they open one of the second solenoid valves 28, thereby transmitting liquid oxygen to the three-way pipe 27. The liquid oxygen in the three-way pipe 27 is then transmitted to the cavity 31. As the pressure in the cavity 31 increases, the liquid oxygen compresses the piston 290, causing it to move. The piston 290 compresses the second spring 294, causing it to deform and simultaneously moving the connecting rod 291. The connecting rod 291 then moves the arc-shaped threaded plate 293, causing the arc-shaped threaded plates 293 on several threaded fixing mechanisms 29 to form a threaded channel. Subsequently, the relevant personnel rotate the external threaded column 21 within the arc-shaped threaded plate 293, fixing the external threaded column 21 to the connecting seat 20. The annular rubber pad 9 is used to enhance the sealing between the external threaded column 21 and the connecting seat 20.

[0036] Afterwards, relevant personnel control and close the second solenoid valve 28, and then open the first solenoid valve 26. Liquid oxygen is transmitted through the injection pipe 22 to the second mounting groove 8. The liquid oxygen in the second mounting groove 8 moves by squeezing the conical sealing block 23 through the arc-shaped through hole 7. The conical sealing block 23 drives the limiting rod 24 to move. The limiting rod 24 squeezes the first spring 25 to deform. Then, the liquid oxygen in the arc-shaped through hole 7 is transmitted sequentially through the conical through groove 5 and the external threaded column 21 to the inflation pipe 12. The liquid oxygen in the inflation pipe 12 is sprayed out through the V-shaped through hole 3 onto several annular combustion aids 15.

[0037] After the liquid oxygen filling is completed, the relevant personnel stop the liquid oxygen delivery through the injection pipe 22. Then, the relevant personnel open the two second solenoid valves 28. At this time, the elastic potential energy of the first spring 25 drives the limit rod 24 to move in the opposite direction. The limit rod 24 drives the conical sealing block 23 to move in the opposite direction. The conical sealing block 23 drives the conical rubber sleeve 30 to move into the conical through groove 5 to seal the arc-shaped through hole 7 and prevent liquid oxygen leakage.

[0038] At this time, the elastic potential energy of the second spring 294 drives the piston 290 to move in the opposite direction. The piston 290 drives the arc-shaped threaded plate 293 away from the external threaded column 21 through the connecting rod 291, which facilitates the quick cutting off of the connection between the injection pipe 22 and the first mounting through slot 4 and protects the safety of use.

[0039] At this time, relevant personnel used the conductive connection wire 13 to energize the ignition plate 18 to initiate the explosion, thereby rapidly vaporizing the liquid oxygen and using it to fracture the rock.

[0040] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A liquid oxygen gas expansion induced rock fracturing apparatus comprising a fracturing assembly (1), characterized in that: The crack-inducing component (1) includes a PE rubber tube (10), two transparent tape sleeves (11), an inflation tube (12), a conductive connecting wire (13), two sealing elements (14), several annular combustion-supporting materials (15), a moisture-proof membrane (16), a thermal insulation layer (17), and several ignition plates (18), wherein, The thermal insulation layer (17) is disposed on the inner wall of the PE rubber tube (10), and the moisture-proof membrane (16) is disposed on the inner wall of the thermal insulation layer (17); A plurality of the annular combustion aids (15) are arranged in a linear array on the inner wall of the moisture-proof membrane (16), and the outer wall of the air-filling tube (12) is attached to the inner wall of the plurality of the annular combustion aids (15). One end of the air-filling tube (12) is sealed, and V-shaped through holes (3) are uniformly opened on the outer wall of the air-filling tube (12). Several ignition pieces (18) are connected in series to the conductive connecting line (13) via wires, and the conductive connecting line (13) and several ignition pieces (18) are attached to the outer wall of several annular combustion aids (15), and the conductive connecting line (13) and several ignition pieces (18) are attached to the inner wall of the moisture-proof film (16); Two sealing elements (14) are symmetrically arranged on the inner wall of the PE rubber tube (10), and two transparent tape sleeves (11) are symmetrically arranged on the outer wall of the PE rubber tube (10). The transparent tape sleeves (11) are made of tape winding. One end of the inflation tube (12) passes through one of the seals (14) and one of the transparent tape sleeves (11) in sequence and is provided with an inflation cut-off assembly (2). One end of the conductive connecting wire (13) passes through one of the seals (14) and one of the transparent tape sleeves (11) in sequence.

2. The liquid oxygen gas expansion induced rock fracturing apparatus of claim 1, wherein: The filling and cutting assembly (2) includes a connecting seat (20), an externally threaded cylinder (21), an injection pipe (22), a conical sealing block (23), a limiting rod (24), a first spring (25), a first solenoid valve (26), a three-way pipe (27), two second solenoid valves (28), and several threaded fixing mechanisms (29), wherein, One end of the external threaded cylinder (21) is provided with a first mounting slot (4), and the air inlet pipe (12) is disposed on the inner wall of the first mounting slot (4); The inner wall of the first mounting through groove (4) is provided with a tapered through groove (5), and the inner wall of the tapered through groove (5) is provided with a first movable through groove (6). The other end of the external threaded cylinder (21) is uniformly provided with arc-shaped through holes (7), and several of the arc-shaped through holes (7) are connected to the conical through groove (5); The outer wall of the conical sealing block (23) is provided with a conical rubber sleeve (30), and the outer wall of the conical rubber sleeve (30) is in contact with the conical through groove (5), and the conical rubber sleeve (30) and the conical through groove (5) are in an interference fit; The limiting rod (24) passes through the tapered through groove (5) and is disposed on one side of the tapered sealing block (23), and one end of the first spring (25) is disposed on the inner wall of the first movable through groove (6), and the other end of the first spring (25) is disposed on one side of the limiting rod (24). A second mounting slot (8) is provided on one side of the connecting seat (20), and the injection pipe (22) is disposed on the inner wall of the second mounting slot (8); The connecting seat (20) has a cavity (31) inside, and the bottom end of the three-way pipe (27) passes through the injection pipe (22), and the injection pipe (22) and the three-way pipe (27) are fixedly connected; One end of the three-way pipe (27) passes through the connecting seat (20), and one end of the three-way pipe (27) is connected to the inside of the cavity (31). The three-way pipe (27) is fixedly connected to the cavity (31). Two second solenoid valves (28) are symmetrically arranged at both ends of the three-way pipe (27), and the first solenoid valve (26) is arranged on the outer wall of the injection pipe (22); A plurality of the threaded fixing mechanisms (29) are arranged in a ring array on the connecting seat (20), the plurality of the threaded fixing mechanisms (29) form a threaded channel, and the plurality of the threaded fixing mechanisms (29) are threadedly connected to the external threaded column (21).

3. The liquid oxygen gas expansion induced rock fracturing apparatus of claim 2, wherein: The threaded fixing mechanism (29) includes several pistons (290), several connecting rods (291), several rubber sealing rings (292), an arc-shaped threaded plate (293), and several second springs (294), wherein, The inner wall of the cavity (31) is uniformly provided with a second movable through groove (32), and the inner wall of the second movable through groove (32) is provided with a circular through hole (33). The outer walls of several pistons (290) are attached to the inner walls of the corresponding second movable through groove (32), and several rubber sealing rings (292) are embedded in the outer walls of the corresponding pistons (290), and the outer walls of several rubber sealing rings (292) are attached to the inner walls of the corresponding second movable through groove (32); One end of one of the connecting rods (291) passes through the corresponding circular through hole (33) and is disposed on one side of the corresponding piston (290); The other ends of several connecting rods (291) are evenly arranged on one side of the arc-shaped threaded plate (293), and the other side of the arc-shaped threaded plate (293) is threaded to the outer wall of the external threaded column (21). A plurality of second springs (294) are sleeved on the corresponding connecting rod (291), one end of the plurality of second springs (294) is disposed on one side of the corresponding piston (290), and the other end of the plurality of second springs (294) is disposed on the inner wall of the corresponding cavity (31).

4. The liquid oxygen gas expansion rock-fracturing device according to claim 2, characterized in that: The inner wall of the second mounting groove (8) is provided with an annular rubber pad (9), which is in contact with the external threaded column (21).

5. The liquid oxygen gas expansion rock-fracturing device according to claim 1, characterized in that: The material of the annular combustion aid (15) is paper towel.

6. The liquid oxygen gas expansion rock-fracturing device according to claim 1, characterized in that: The material of the inflation tube (12) is aluminum tube or plastic PE tube.

7. The liquid oxygen gas expansion rock-fracturing device according to claim 1, characterized in that: The material of the moisture-proof film (16) is transparent tape.

8. The liquid oxygen gas expansion induced rock fracturing apparatus of claim 1, wherein: The material of the sealing member (14) is structural glue or sponge.

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