Anti-static flexible fracturing rock breaking pipe based on plastic oxygenation guide pipe and rock breaking method

Abstract

The invention discloses an anti-static flexible fracturing rock breaking pipe based on a plastic oxygenation guide pipe, which comprises a flexible outer sleeve film with two closed ends and filled with an adsorption material incendiary agent, and further comprises the plastic oxygenation guide pipe penetrating into the flexible outer sleeve film from the top of the flexible outer sleeve film, an excitation wire and an exhaust pipe, the excitation wire is connected with an electric ignition device, and the electric ignition device is positioned in the flexible outer sleeve film and is in contact with the adsorption material combustion agent; the outer wall of the plastic oxygenation conduit is coated with a flexible conductive enhancement layer, and the flexible conductive enhancement layer is connected with a ground grounding body. The invention further discloses a rock breaking method using the anti-static flexible fracturing rock breaking pipe based on the plastic oxygenation guide pipe, the flexible conductive reinforcing layer is arranged on the outer wall of the plastic oxygenation guide pipe, and the flexible conductive reinforcing layer makes contact with the ground for conduction; static electricity generated in the process of filling liquid oxygen or pressurized high-purity liquid oxygen into the plastic oxygen filling guide pipe can be eliminated, and the risk of safety accidents caused by the static electricity is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the field of rock breaking technology, specifically to an anti-static flexible cracking rock breaking pipe based on a plastic oxygen filling pipe, and the present invention also relates to a rock breaking method. Background Art

[0002] Traditional explosive blasting technology has been widely used in rock breaking operations, but it has problems such as low safety, large environmental pollution, and complex construction. In recent years, a new energy (liquid oxygen) rock breaking technology based on liquid oxygen and carbon-based materials as blasting or rock breaking media has gradually attracted attention. This technology has characteristics such as safety and economy, green and low-carbon, and convenient construction, and has become one of the important development directions of gas rock breaking technology. Liquid oxygen rock breaking technology is also called "new energy (liquid oxygen) rock breaking technology", "supercritical liquefied air energy storage (LAES) non-supplementary combustion rock breaking technology", "liquefied air energy storage (LAES) supercritical biomass gasification rock breaking technology", "liquid oxygen transient phase change expansion rock breaking technology" or "liquid oxygen explosive", etc.

[0003] However, in the actual application of liquid oxygen rock breaking technology, when liquid oxygen or pressurized high-purity oxygen is filled into the cracking rock breaking pipe (or called explosive package) placed in the drill hole, static electricity will be generated. If the static electricity accumulation reaches a certain level, it is very likely to trigger an uncontrolled explosion accident, posing a serious threat to the lives of operating personnel and surrounding facilities, objects, etc. Therefore, the static electricity generated during the filling process of liquid oxygen or pressurized high-purity oxygen is a safety hazard that cannot be ignored in liquid oxygen rock breaking technology.

[0004] At present, the existing ordinary cracking rock breaking pipes (or explosive packages) have obvious deficiencies in dealing with the static electricity generated during the filling process of liquid oxygen or pressurized high-purity oxygen, and cannot eliminate or conduct away the static electricity generated during the operation in a timely and continuous manner. This defect makes it difficult for the existing technology to effectively meet the essential safety requirements of liquid oxygen rock breaking technology. Summary of the Invention

[0005] The purpose of the present invention is to provide an anti-static flexible cracking rock breaking pipe based on a plastic oxygen filling pipe, which can conduct away the static electricity generated during the filling process of liquid oxygen or pressurized high-purity oxygen.

[0006] Another purpose of the present invention is to provide a rock breaking method.

[0007] The technical solution adopted by the present invention is an anti-static flexible cracking rock breaking pipe based on an oxygen filling pipe, which includes a flexible outer membrane with both ends closed and filled with an adsorption material combustion agent, and also includes a plastic oxygen filling pipe, an ignition wire, and an exhaust pipe that penetrate into it from the top of the flexible outer membrane; The ignition wire is connected to an electric ignition device, and the electric ignition device is located inside the flexible outer membrane and in contact with the adsorption material combustion agent; The outer wall of the plastic oxygen - filling conduit is coated with a flexible conductive reinforcing layer, and the flexible conductive reinforcing layer is connected to a ground grounding body.

[0008] The features of the present invention also lie in: The flexible conductive reinforcing layer is a metal wire or metal strip wound around the outer wall of the plastic oxygen - filling conduit. One end of the metal wire or metal strip is led out to the outside of the top of the flexible outer membrane along with the plastic oxygen - filling conduit, and the other end passes through the bottom of the flexible outer membrane.

[0009] The flexible conductive reinforcing layer is a metal foil wrapped around the outer wall of the plastic oxygen - filling conduit.

[0010] The pipe section of the plastic oxygen - filling conduit located inside the flexible outer membrane is J - shaped, and the pipe wall is evenly provided with fine holes.

[0011] The material of the plastic oxygen - filling conduit is one of polytetrafluoroethylene, polyamide, polyetheretherketone, polyvinylidene fluoride, polyethylene, and polyurethane.

[0012] There are multiple electric ignition devices.

[0013] The excitation wire uses insulated twin - wire, and multiple electric ignition devices are connected in parallel through the excitation wire.

[0014] The material of the flexible outer membrane is one of polypropylene, polyester, nylon, polyvinyl alcohol, polyethylene, and high - density polyethylene.

[0015] The adsorbent material combustion agent is one or more of carbon black, soot ash, charcoal, peat, coal dust, peat moss, wood chips, straw, hemp peel, feather grass, wheat husk, moss, cotton, waste paper scraps, leaf scraps, toilet paper, and aluminum fiber.

[0016] Another technical solution adopted by the present invention is a rock - breaking method. Using the above - mentioned anti - static flexible cracking rock - breaking pipe based on a plastic oxygen - filling conduit, it specifically includes the following steps: Step 1: Drill a hole in the rock to be cracked and moisten the bottom of the hole. Step 2: Place the anti - static flexible cracking rock - breaking pipe based on the plastic oxygen - filling conduit into the hole, and lead out the excitation wire, exhaust pipe, plastic oxygen - filling conduit, and flexible conductive reinforcing layer outside the hole. Step 3: Use a hole - sealing plugging body to plug the hole and moisten the hole - sealing plugging body. Step 4: The plastic oxygen - filling conduit is connected to an external oxygen - filling pipe network outside the hole, and the flexible conductive reinforcing layer is connected to the ground grounding body. Step 5: The external oxygen - filling pipe network transports liquid oxygen or pressurized high - purity oxygen into the flexible outer membrane through the plastic oxygen - filling conduit, and the adsorbent material combustion agent adsorbs the liquid oxygen or pressurized high - purity oxygen. Step 6: Energize the excitation wire, and the electric ignition device generates a flame to ignite the adsorbent material combustion agent. The adsorbent material combustion agent burns to release energy and generate high-pressure gas, and the high-pressure gas fractures the rock.

[0017] The beneficial effects of the present invention are as follows: By providing a flexible conductive enhancement layer on the outer wall of the plastic oxygen filling conduit, the flexible conductive enhancement layer is connected and conducted with the ground grounding body, the bottom-hole earth, and the hole-sealing plugging body in the hole mouth section, forming a conductive path with the earth, so that the static electricity generated during the filling of liquid oxygen or pressurized high-purity liquid oxygen can be efficiently, timely, and continuously conducted away and eliminated, thereby greatly reducing the risk of safety accidents caused by static electricity. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the anti-static flexible fracturing rock-breaking pipe based on the plastic oxygen filling conduit of the present invention.

[0019] In the figure, 1. Plastic oxygen filling conduit; 2. Flexible conductive enhancement layer; 3. Adsorbent material combustion agent; 4. Electric ignition device; 5. Excitation wire; 6. Exhaust pipe; 7. Flexible outer membrane; 8. Hole-sealing plugging body; 9. Outer-hole oxygen filling pipe network; 10. Ground grounding body. Detailed Embodiments

[0020] The present invention will be described in detail below with reference to the drawings and specific embodiments.

[0021] Embodiment 1 An anti-static flexible fracturing rock-breaking pipe based on a plastic oxygen filling conduit of the present invention, as Figure 1 shown, includes a flexible outer membrane 7. The flexible outer membrane 7 is a plastic film sleeve made of polypropylene, polyester, nylon, polyvinyl alcohol (PVA), polyethylene (PE), or high-density polyethylene (HDPE). This plastic film sleeve has good flexibility, toughness, and low-temperature resistance. The hole mouth end and the hole bottom end of the flexible outer membrane 7 are both closed, and an adsorbent material combustion agent 3 is filled therein. The adsorbent material combustion agent 3 is made of a material with good adsorption, combustibility, and a large number of internal voids, such as carbon black, soot ash, charcoal, peat, coal dust, peat, wood chips (powder), straw (rice, wheat, sorghum straw, etc.), hemp peel, feather grass, wheat husk, moss, cotton, waste paper scraps, leaf scraps, toilet paper, aluminum fiber, porous soft shapes, or fine-grained organic synthetic substances. During use, the flexible outer membrane 7 filled with the adsorbent material combustion agent 3 is placed in a drill hole dug on the rock to be fractured, and the drill hole is plugged with a hole-sealing plugging body 8.

[0022] It also includes a plastic oxygen - filling conduit 1, an exhaust pipe 6, and an ignition wire 5; the material of the plastic oxygen - filling conduit 1 should have a certain flexibility, excellent low - temperature resistance, be able to fill liquid oxygen or pressurized high - purity oxygen, and be able to adapt to the bending and coiling of the rock - fracturing pipe. A flexible conductive reinforcement layer 2 is provided on the outer wall of the plastic oxygen - filling conduit 1. In this embodiment, the flexible conductive reinforcement layer 2 is a metal wire or metal strip, and the outer wall of the plastic oxygen - filling conduit 1 is wound with a metal wire or metal strip throughout the whole length.

[0023] One end of the plastic oxygen - filling conduit 1 and the metal wire or metal strip wound around its outer wall penetrates through the top of the flexible outer membrane 7 and extends into the flexible outer membrane 7, and the other end is led out of the borehole. The plastic oxygen - filling conduit 1 at the end led out of the borehole is connected to the oxygen - filling pipe network 9 outside the guide hole through an interface. The oxygen - filling pipe network 9 outside the hole is used to transport liquid oxygen or pressurized high - purity oxygen into the plastic oxygen - filling conduit 1. It uses a metal pipe with low - temperature resistance and good cold - brittleness resistance. The metal wire or metal strip is wound around the oxygen - filling pipe network 9 outside the guide hole. The metal wire or metal strip led out of the borehole is also connected to a ground grounding body 10, and the ground grounding body 10 is grounded on the surface outside the hole. The metal wire or metal strip located inside the flexible outer membrane 7 passes through the bottom of the flexible outer membrane 7 and contacts the ground at the bottom of the hole to ensure that the metal wire or metal strip is electrically connected to the earth at the bottom of the hole.

[0024] One end of the exhaust pipe 6 penetrates through the top of the flexible outer membrane 7 and extends into the flexible outer membrane 7, and the other end is led out of the borehole. The exhaust pipe 6 remains unobstructed to dynamically balance the internal and external air pressures of the rock - fracturing pipe. The exhaust pipe 6 uses a metal pipe with low - temperature resistance and a certain flexibility.

[0025] One end of the ignition wire 5 penetrates through the top of the flexible outer membrane 7 and extends into the flexible outer membrane 7 and contacts the adsorbent material combustion agent 3. The part of the ignition wire 5 located inside the flexible outer membrane 7 is connected to an electric ignition device 4, and the electric ignition device 4 contacts the adsorbent material combustion agent 3. During use, the ignition wire 5 is energized, thereby exciting the electric ignition device 4 to generate a flame and ignite the adsorbent material combustion agent 3.

[0026] Embodiment 2 An anti - static flexible rock - fracturing pipe based on a plastic oxygen - filling conduit according to the present invention, as Figure 1As shown in the figure, it includes a flexible outer membrane 7, which is a plastic film sleeve made of polypropylene, polyester, nylon, polyvinyl alcohol (PVA), polyethylene (PE), or high-density polyethylene (HDPE). This plastic film sleeve has good flexibility, toughness, and low-temperature resistance. The orifice end and the bottom end of the flexible outer membrane 7 are both closed, and it is filled with an adsorbent combustion agent 3. The adsorbent combustion agent 3 is made of a material with good adsorption, flammability, and a large number of internal voids, such as carbon black, soot ash, charcoal, peat, coal dust, peat moss, wood chips (powder), straw (rice, wheat, sorghum straw, etc.), hemp peel, feather grass, wheat husk, moss, cotton, waste paper scraps, leaf scraps, toilet paper, aluminum fiber, porous soft substances, or fine-grained organic compounds. During use, the flexible outer membrane 7 filled with the adsorbent combustion agent 3 is placed in a drill hole dug in the rock to be fractured, and the drill hole is sealed with a hole-sealing plug 8.

[0027] It also includes a plastic oxygen-filling conduit 1, an exhaust pipe 6, and an excitation wire 5. The material of the plastic oxygen-filling conduit 1 needs to have a certain degree of flexibility, excellent low-temperature resistance, be able to fill liquid oxygen or pressurized high-purity oxygen, and be able to adapt to the bending and coiling of the rock-breaking pipe. A flexible conductive reinforcement layer 2 is provided on the outer wall of the plastic oxygen-filling conduit 1. In this embodiment, the flexible conductive reinforcement layer 2 is a metal foil, and the outer wall of the plastic oxygen-filling conduit 1 is entirely wrapped with the metal foil.

[0028] One end of the plastic oxygen-filling conduit 1 and the metal foil wrapped around its outer wall penetrates through the top of the flexible outer membrane 7 and extends into the flexible outer membrane 7, and the other end is led out of the drill hole. The plastic oxygen-filling conduit 1 at the end led out of the drill hole is connected to an oxygen-filling pipe network 9 outside the guide hole through an interface. The oxygen-filling pipe network 9 outside the hole is used to transport liquid oxygen or pressurized high-purity oxygen into the plastic oxygen-filling conduit 1. It uses a metal pipe with low-temperature resistance and good cold brittleness resistance. The metal foil led out of the drill hole is also connected to a ground grounding body 10, and the ground grounding body 10 is grounded on the surface outside the hole.

[0029] In another embodiment, fine holes are provided on both the pipe wall of the plastic oxygen-filling conduit 1 located inside the flexible outer membrane 7 and the metal foil wrapped around its outer wall. These fine holes facilitate the rapid diffusion of liquid oxygen or pressurized high-purity oxygen to the adsorbent combustion agent 3.

[0030] One end of the exhaust pipe 6 penetrates through the top of the flexible outer membrane 7 and extends into the flexible outer membrane 7, and the other end is led out of the drill hole. The exhaust pipe 6 is used to maintain smoothness to dynamically balance the internal and external air pressures of the rock-breaking pipe. The exhaust pipe 6 uses a pipe with low-temperature resistance and a certain degree of flexibility.

[0031] One end of the ignition wire 5 penetrates through the top of the flexible outer membrane 7 and extends into the flexible outer membrane 7 to contact the adsorbent material fuel 3. The part of the ignition wire 5 located inside the flexible outer membrane 7 is connected with an electric ignition device 4, and the electric ignition device 4 contacts the adsorbent material fuel 3. During use, the ignition wire 5 is electrified, thereby exciting the electric ignition device 4 to generate a flame and ignite the adsorbent material fuel 3.

[0032] Embodiment 3 An anti-static flexible rock fracturing pipe based on a plastic oxygen filling conduit according to the present invention, as Figure 1 shown, includes a flexible outer membrane 7. The flexible outer membrane 7 is a plastic film sleeve made of polypropylene, polyester, nylon, polyvinyl alcohol (PVA), polyethylene (PE), or high-density polyethylene (HDPE). This plastic film sleeve has good flexibility, toughness, and low-temperature resistance. The orifice end and the bottom end of the flexible outer membrane 7 are both closed, and it is filled with an adsorbent material fuel 3. The adsorbent material fuel 3 is made of a material with good adsorption, flammability, and a large number of internal voids, such as carbon black, soot ash, charcoal, peat, coal dust, peat moss, wood chips (powder), grass stalks (rice, wheat, sorghum stalks, etc.), hemp bark, feather grass, wheat husks, moss, cotton, waste paper scraps, leaf scraps, rolled paper, aluminum fibers, porous soft shapes, or fine-grained organic compounds. During use, the flexible outer membrane 7 filled with the adsorbent material fuel 3 is placed in a drill hole dug in the rock to be fractured, and the drill hole is blocked with a hole-sealing plug 8.

[0033] It also includes a plastic oxygen filling conduit 1, an exhaust pipe 6, and an ignition wire 5. The material of the plastic oxygen filling conduit 1 needs to have a certain flexibility, excellent low-temperature resistance, be able to fill liquid oxygen or pressurized high-purity oxygen, and be able to adapt to the bending and coiling of the rock fracturing pipe. A flexible conductive reinforcement layer 2 is provided on the outer wall of the plastic oxygen filling conduit 1. In this embodiment, the flexible conductive reinforcement layer 2 is a metal wire or metal strip, and the outer wall of the plastic oxygen filling conduit 1 is wound with a metal wire or metal strip throughout.

[0034] One end of the plastic oxygen filling conduit 1 and the metal wire or metal strip wound around its outer wall penetrates through the top of the flexible outer membrane 7 and extends into the flexible outer membrane 7, and the other end is led out of the drill hole. The plastic oxygen filling conduit 1 at the end led out of the drill hole is connected to an oxygen filling pipe network 9 outside the guide hole through an interface. The oxygen filling pipe network 9 outside the hole is used to transport liquid oxygen or pressurized high-purity oxygen into the plastic oxygen filling conduit 1. It is made of a metal pipe with low-temperature resistance and good cold brittleness resistance. The metal wire or metal strip is wound around the oxygen filling pipe network 9 outside the guide hole. The metal wire or metal strip led out of the drill hole is also connected to a ground grounding body 10, and the ground grounding body 10 is grounded on the ground surface outside the hole. The metal wire or metal strip located inside the flexible outer membrane 7 passes through the bottom of the flexible outer membrane 7 and contacts the ground at the bottom of the hole. The ground grounding body 10 is made of a metal material and is used to timely conduct the static electricity generated during the filling process of the plastic oxygen filling conduit 1 into the ground to avoid static electricity accumulation.

[0035] The plastic oxygen - filling conduit 1 is arranged at the axial center line position of the flexible outer membrane 7. One end of it inside the flexible outer membrane 7 bends upward to form a J - shape, which is convenient for liquid oxygen or pressurized high - purity oxygen to quickly fill the adsorbent fuel 3 from bottom to top.

[0036] One end of the exhaust pipe 6 penetrates through the top end of the flexible outer membrane 7 and extends into the flexible outer membrane 7, and the other end is led out of the drill hole. The exhaust pipe 6 remains unobstructed to dynamically balance the internal and external air pressures of the fracture - rock - breaking pipe. The exhaust pipe 6 is made of a low - temperature - resistant and flexible pipe material.

[0037] One end of the ignition wire 5 penetrates through the top of the flexible outer membrane 7 and extends into the flexible outer membrane 7 and contacts the adsorbent fuel 3. The part of the ignition wire 5 inside the flexible outer membrane 7 is connected with an electric ignition device 4, and the electric ignition device 4 contacts the adsorbent fuel 3. During use, the ignition wire 5 is electrified, and then the electric ignition device 4 is excited to generate a flame to ignite the adsorbent fuel 3.

[0038] Example 4 An anti - static flexible fracture - rock - breaking pipe based on a plastic oxygen - filling conduit according to the present invention, as Figure 1 shown, includes a flexible outer membrane 7. The flexible outer membrane 7 is a plastic film sleeve made of polypropylene, polyester, nylon, polyvinyl alcohol (PVA), polyethylene (PE), or high - density polyethylene (HDPE). This plastic film sleeve has good flexibility, toughness, and low - temperature resistance. Both the orifice end and the bottom end of the flexible outer membrane 7 are closed, and it is filled with an adsorbent fuel 3. The adsorbent fuel 3 is made of a material with good adsorption, flammability, and a large number of internal voids, such as carbon black, soot ash, charcoal, peat, coal dust, peat moss, wood chips (powder), grass stalks (rice, wheat, sorghum stalks, etc.), hemp peel, feather grass, wheat husk, moss, cotton, waste paper scraps, leaf scraps, toilet paper, aluminum fiber, porous soft shapes, or fine - particle organic compounds. During use, the flexible outer membrane 7 filled with the adsorbent fuel 3 is placed in a drill hole dug in the rock to be fractured, and the drill hole is blocked with a hole - blocking plug 8.

[0039] It also includes a plastic oxygen - filling conduit 1, an exhaust pipe 6, and an ignition wire 5. The material of the plastic oxygen - filling conduit 1 needs to have a certain flexibility, excellent low - temperature resistance, be able to fill liquid oxygen or pressurized high - purity oxygen, and be able to adapt to the bending and coiling of the fracture - rock - breaking pipe. Preferably, it is one of polytetrafluoroethylene (PTFE), polyamide (PA, nylon), polyetheretherketone (PEEK), polyvinylidene fluoride (PVDF), polyethylene (PE), and polyurethane (PU). A flexible conductive reinforcement layer 2 is arranged on the outer wall of the plastic oxygen - filling conduit 1. In this embodiment, the flexible conductive reinforcement layer 2 is a metal wire or a metal strip, and the outer wall of the plastic oxygen - filling conduit 1 is wound with a metal wire or a metal strip throughout.

[0040] The plastic oxygen - filling conduit 1 and one end of the metal wire or metal strip wound around its outer wall penetrate through the top of the flexible outer membrane 7 and extend into the flexible outer membrane 7, while the other end is led out of the borehole. The plastic oxygen - filling conduit 1 at the end led out of the borehole is connected to the oxygen - filling pipe network 9 outside the guide hole through an interface. The oxygen - filling pipe network 9 outside the hole is used to transport liquid oxygen or pressurized high - purity oxygen into the plastic oxygen - filling conduit 1. It uses a metal pipe material with low - temperature resistance and good cold - brittleness resistance. The metal wire or metal strip is wound around the oxygen - filling pipe network 9 outside the guide hole. The metal wire or metal strip led out of the borehole is also connected to a ground grounding body 10, and the ground grounding body 10 is grounded on the surface outside the hole. The metal wire or metal strip located inside the flexible outer membrane 7 passes through the bottom of the flexible outer membrane 7 and contacts the ground at the bottom of the hole. The ground grounding body 10 is made of metal material and is used to timely conduct the static electricity generated during the filling process of the plastic oxygen - filling conduit 1 into the earth to avoid static electricity accumulation.

[0041] The plastic oxygen - filling conduit 1 is arranged at the axial center line position of the flexible outer membrane 7. One end of it inside the flexible outer membrane 7 bends upward to form a J - shape, which is convenient for liquid oxygen or pressurized high - purity oxygen to quickly fill the adsorbent combustion agent 3 from bottom to top.

[0042] One end of the exhaust pipe 6 penetrates through the top of the flexible outer membrane 7 and extends into the flexible outer membrane 7, and the other end is led out of the borehole. The exhaust pipe 6 remains unobstructed to dynamically balance the internal and external air pressures of the fracturing rock - breaking pipe. The exhaust pipe 6 uses a pipe material with low - temperature resistance and a certain degree of flexibility.

[0043] One end of the excitation wire 5 penetrates through the top of the flexible outer membrane 7 and extends into the flexible outer membrane 7 and contacts the adsorbent combustion agent 3. The part of the excitation wire 5 inside the flexible outer membrane 7 is connected to an electric ignition device 4, and the electric ignition device 4 contacts the adsorbent combustion agent 3. During use, the excitation wire 5 is energized, and then the electric ignition device 4 is excited to generate a flame to ignite the adsorbent combustion agent 3.

[0044] Embodiment 5 A static - electricity - preventing flexible fracturing rock - breaking pipe based on a plastic oxygen - filling conduit according to the present invention, as Figure 1As shown in the figure, it includes a flexible outer membrane 7, which is a plastic film sleeve made of polypropylene, polyester, nylon, polyvinyl alcohol (PVA), polyethylene (PE), or high-density polyethylene (HDPE). This plastic film sleeve has good flexibility, toughness, and low-temperature resistance. The orifice end and the bottom end of the flexible outer membrane 7 are both closed, and it is filled with an adsorbent combustion agent 3. The adsorbent combustion agent 3 is made of a material with good adsorption, flammability, and a large number of internal voids, such as carbon black, soot ash, charcoal, peat, coal dust, peat moss, wood chips (powder), straw (rice, wheat, sorghum straw, etc.), hemp peel, feather grass, wheat husk, moss, cotton, waste paper scraps, leaf scraps, rolled paper, aluminum fiber, porous soft substances, or fine-grained organic compounds. When in use, the flexible outer membrane 7 filled with the adsorbent combustion agent 3 is placed in a drill hole dug in the rock to be fractured, and the drill hole is sealed with a hole-sealing plugging body 8.

[0045] It also includes a plastic oxygen supply conduit 1, an exhaust pipe 6, and an excitation wire 5. The material of the plastic oxygen supply conduit 1 needs to have a certain flexibility, excellent low-temperature resistance, be able to fill liquid oxygen or pressurized high-purity oxygen, and be able to adapt to the bending and coiling of the fracture rock-breaking pipe. Preferably, it is one of polytetrafluoroethylene (PTFE), polyamide (PA, nylon), polyetheretherketone (PEEK), polyvinylidene fluoride (PVDF), polyethylene (PE), or polyurethane (PU). A flexible conductive reinforcement layer 2 is provided on the outer wall of the plastic oxygen supply conduit 1. In this embodiment, the flexible conductive reinforcement layer 2 is a metal wire or metal strip, and the metal wire or metal strip is wound around the entire outer wall of the plastic oxygen supply conduit 1.

[0046] One end of the plastic oxygen supply conduit 1 and the metal wire or metal strip wound around its outer wall penetrates through the top of the flexible outer membrane 7 and extends into the flexible outer membrane 7, and the other end is led out of the drill hole. The plastic oxygen supply conduit 1 at the end led out of the drill hole is connected to an oxygen supply pipe network 9 outside the guide hole through an interface. The oxygen supply pipe network 9 outside the hole is used to transport liquid oxygen or pressurized high-purity oxygen into the plastic oxygen supply conduit 1. It is made of a metal pipe with low-temperature resistance and good cold brittleness resistance. The metal wire or metal strip is wound around the oxygen supply pipe network 9 outside the guide hole. The metal wire or metal strip led out of the drill hole is also connected to a ground grounding body 10, and the ground grounding body 10 is grounded on the ground surface outside the hole. The metal wire or metal strip located inside the flexible outer membrane 7 passes through the bottom of the flexible outer membrane 7 and contacts the ground at the bottom of the hole. The ground grounding body 10 is made of a metal material to timely conduct the static electricity generated during the filling process of the plastic oxygen supply conduit 1 into the ground and avoid static electricity accumulation.

[0047] The plastic oxygen - filling conduit 1 is arranged at the axial center line position of the flexible outer sheath 7. One end of it inside the flexible outer sheath 7 bends upward to form a J - shape, which is convenient for liquid oxygen or pressurized high - purity oxygen to quickly fill the adsorbent fuel 3 from bottom to top. Fine holes are provided on the pipe wall of the plastic oxygen - filling conduit 1 and the metal strip wound around its outer wall inside the flexible outer sheath 7, which is convenient for liquid oxygen or pressurized high - purity oxygen to quickly diffuse into the adsorbent fuel 3.

[0048] One end of the exhaust pipe 6 penetrates through the top end of the flexible outer sheath 7 and extends into the flexible outer sheath 7, and the other end is led out of the drill hole. The exhaust pipe 6 remains unobstructed to dynamically balance the internal and external air pressures of the fracturing rock - breaking pipe. The exhaust pipe 6 is made of a low - temperature - resistant pipe material with a certain degree of flexibility.

[0049] One end of the excitation wire 5 penetrates through the top of the flexible outer sheath 7 and extends into the flexible outer sheath 7 and contacts the adsorbent fuel 3. The part of the excitation wire 5 inside the flexible outer sheath 7 is connected with an electric ignition device 4, and the electric ignition device 4 contacts the adsorbent fuel 3. During use, the excitation wire 5 is electrified, thereby exciting the electric ignition device 4 to generate a flame and ignite the adsorbent fuel 3.

[0050] Embodiment 6 An anti - static flexible fracturing rock - breaking pipe based on a plastic oxygen - filling conduit of the present invention, as Figure 1 shown, includes a flexible outer sheath 7. The flexible outer sheath 7 is a plastic film sleeve made of polypropylene, polyester, nylon, polyvinyl alcohol (PVA), polyethylene (PE), high - density polyethylene (HDPE). This plastic film sleeve has good flexibility, toughness and low - temperature resistance. Both the orifice end and the bottom end of the flexible outer sheath 7 are closed, and it is filled with an adsorbent fuel 3. The adsorbent fuel 3 is made of a material with good adsorption, combustibility and a large number of internal voids, such as carbon black, soot ash, charcoal, peat, coal dust, peat, wood chips (powder), grass stalks (rice, wheat, sorghum stalks, etc.), hemp peel, feather grass, wheat husk, moss, cotton, waste paper scraps, leaf scraps, toilet paper, aluminum fiber, porous soft shapes or fine - particle organic compounds. During use, the flexible outer sheath 7 filled with the adsorbent fuel 3 is placed in a drill hole dug in the rock to be fractured, and the drill hole is blocked with a hole - sealing plugging body 8.

[0051] It also includes a plastic oxygen - filling conduit 1, an exhaust pipe 6, and an excitation wire 5. The material of the plastic oxygen - filling conduit 1 should have a certain flexibility, excellent low - temperature resistance, be able to fill liquid oxygen or pressurized high - purity oxygen, and be able to adapt to the bending and coiling of the rock - fracturing pipe. Preferably, it is one of polytetrafluoroethylene (PTFE), polyamide (PA, nylon), polyetheretherketone (PEEK), polyvinylidene fluoride (PVDF), polyethylene (PE), and polyurethane (PU). A flexible conductive reinforcement layer 2 is provided on the outer wall of the plastic oxygen - filling conduit 1. In this embodiment, the flexible conductive reinforcement layer 2 is a metal wire or a metal strip, and the outer wall of the plastic oxygen - filling conduit 1 is wound with a metal wire or a metal strip throughout the whole process.

[0052] One end of the plastic oxygen - filling conduit 1 and the metal wire or metal strip wound around its outer wall penetrates through the top of the flexible outer membrane 7 and extends into the flexible outer membrane 7, and the other end is led out of the borehole. The plastic oxygen - filling conduit 1 at the end led out of the borehole is connected to the oxygen - filling pipe network 9 outside the guide hole through an interface. The oxygen - filling pipe network 9 outside the hole is used to transport liquid oxygen or pressurized high - purity oxygen into the plastic oxygen - filling conduit 1. It uses a metal pipe with low - temperature resistance and good cold - brittleness resistance. The metal wire or metal strip is wound on the oxygen - filling pipe network 9 outside the guide hole. The metal wire or metal strip led out of the borehole is also connected to a ground grounding body 10, and the ground grounding body 10 is grounded on the surface outside the hole. The metal wire or metal strip located inside the flexible outer membrane 7 passes through the bottom of the flexible outer membrane 7 and contacts the ground at the bottom of the hole. The ground grounding body 10 is made of metal material and is used to timely conduct the static electricity generated during the filling process of the plastic oxygen - filling conduit 1 into the earth to avoid static electricity accumulation.

[0053] The plastic oxygen - filling conduit 1 is arranged at the axial center line position of the flexible outer membrane 7. One end of it inside the flexible outer membrane 7 bends upward to form a J - shape, which is convenient for liquid oxygen or pressurized high - purity oxygen to quickly fill the adsorbent fuel 3 from bottom to top. Fine holes are provided on the pipe wall of the plastic oxygen - filling conduit 1 and the metal strip wound around its outer wall inside the flexible outer membrane 7, which is convenient for liquid oxygen or pressurized high - purity oxygen to quickly diffuse to the adsorbent fuel 3.

[0054] One end of the exhaust pipe 6 penetrates through the top of the flexible outer membrane 7 and extends into the flexible outer membrane 7, and the other end is led out of the borehole. The exhaust pipe 6 remains unobstructed to dynamically balance the internal and external air pressures of the rock - fracturing pipe. The exhaust pipe 6 uses a pipe with low - temperature resistance and a certain flexibility.

[0055] One end of the firing wire 5 penetrates through the top of the flexible outer membrane 7 and extends into the flexible outer membrane 7 to contact the adsorbent material fuel agent 3. The part of the firing wire 5 located inside the flexible outer membrane 7 is connected with an electric ignition device 4, and the electric ignition device 4 contacts the adsorbent material fuel agent 3. There are multiple electric ignition devices 4, which are evenly dispersed inside the flexible outer membrane 7 and contact the adsorbent material fuel agent 3. The firing wire 5 adopts an insulated twin wire, and multiple electric ignition devices 4 are connected in parallel through the firing wire 5. During use, the firing wire 5 is electrified, thereby exciting the electric ignition device 4 to generate a flame and ignite the adsorbent material fuel agent 3.

[0056] The present invention also discloses a method for rock breaking using the above-mentioned anti-static flexible rock-breaking pipe based on a plastic oxygen-filled conduit, which specifically includes the following steps: Step 1, drill a hole in the rock to be fractured and moisten the bottom of the hole. Step 2, place the above-mentioned anti-static flexible rock-breaking pipe based on a plastic oxygen-filled conduit into the hole, and keep the ends of the plastic oxygen-filled conduit, the flexible conductive reinforcement layer, the firing wire, and the exhaust pipe outside the hole. Step 3, use the hole-sealing plugging body 8 to plug the hole. The firing wire 5, the exhaust pipe 6, the plastic oxygen-filled conduit 1, and the flexible conductive reinforcement layer 2 on its outer wall all pass through the hole-sealing plugging body 8 and are led out of the hole. Moisten the hole-sealing plugging body 8 to increase the humidity of the hole-sealing plugging body 8 and ensure that the section of the flexible conductive reinforcement layer 2 located inside the hole-sealing plugging body 8 is electrically connected to the hole-sealing plugging body 8 and the ground. Step 4, connect the outer end of the plastic oxygen-filled conduit 1 to the off-hole oxygen-filled pipe network 9 outside the hole, connect the flexible conductive reinforcement layer 2 to the ground grounding body 10, and the ground grounding body 10 is electrically connected to the ground. Step 5, the off-hole oxygen-filled pipe network 9 conveys liquid oxygen or pressurized high-purity oxygen to the plastic oxygen-filled conduit 1, and the adsorbent material fuel agent 3 adsorbs the liquid oxygen or pressurized high-purity oxygen. Step 6, electrify the firing wire 5, the electric ignition device 4 generates a flame to ignite the adsorbent material fuel agent 3, the adsorbent material fuel agent 3 burns and releases energy to generate high-pressure gas, and the high-pressure gas ruptures the rock after being released.

[0057] By arranging a flexible conductive reinforcement layer on the outer wall of the plastic oxygen-filled conduit, connecting the opposite grounding body to the flexible conductive reinforcement layer outside the hole, and moistening the hole-sealing plugging body at the same time to ensure the electrical connection between the flexible conductive reinforcement layer and the hole-sealing plugging body, the inside and outside of the rock-breaking pipe are both electrically connected to the ground, so as to conduct away the static electricity generated during the filling process of liquid oxygen or pressurized high-purity liquid oxygen. Compared with the existing ordinary similar rock-breaking pipes, the present invention can conduct away and eliminate the static electricity generated during the filling process of liquid oxygen or pressurized high-purity liquid oxygen more efficiently, timely, and continuously, greatly reducing the risk of safety accidents caused by static electricity.

Claims

1. Antistatic flexible cracking rock breaking pipe based on plastic oxygenated conduit, characterized in that: It comprises a flexible outer membrane (7) with closed ends and filled with an adsorbent combustion agent (3) inside, and also comprises a plastic oxygenation conduit (1), an excitation wire (5) and an exhaust pipe (6) penetrating from the top of the flexible outer membrane (7) into the flexible outer membrane (7); The excitation wire (5) is connected to an electric ignition device (4), and the electric ignition device (4) is located inside the flexible outer film (7) and in contact with the adsorption material combustion agent (3); The outer wall of the plastic oxygenation conduit (1) is coated with a flexible conductive reinforcement layer (2), and the flexible conductive reinforcement layer (2) is connected to a grounding body (10).

2. The anti-static flexible fracture rock breaking pipe based on plastic oxygenated conduit according to claim 1 is characterized in that: The flexible conductive reinforcement layer (2) is a metal wire or metal belt wound around the outer wall of the plastic oxygenation conduit (1); one end of the metal wire or metal belt is led out along the plastic oxygenation conduit (1) to the outside of the top of the flexible outer membrane (7), and the other end is passed out from the bottom of the flexible outer membrane (7).

3. The anti-static flexible fracture rock breaking pipe based on plastic oxygenated conduit according to claim 1 is characterized in that: The flexible conductive reinforcement layer (2) is a metal foil wrapped around the outer wall of the plastic oxygenation conduit (1).

4. The anti-static flexible fracture rock breaking pipe based on plastic oxygenated conduit according to claim 1 is characterized in that: The section of the plastic oxygenation catheter (1) located inside the flexible outer membrane (7) is J-shaped, and fine pores are evenly formed on the wall of the tube.

5. The anti-static flexible fracture rock breaking pipe based on plastic oxygenated conduit according to any one of claims 1 to 4, characterized in that: The material of the plastic oxygenation catheter (1) is one of polytetrafluoroethylene, polyamide, polyetheretherketone, polyvinylidene fluoride, polyethylene, and polyurethane.

6. The anti-static flexible fracture rock breaking pipe based on plastic oxygenated conduit according to claim 5 is characterized in that: There are multiple electric ignition devices (4).

7. The anti-static flexible fracture rock breaking pipe based on plastic oxygenated conduit according to claim 6 is characterized in that: The excitation wire (5) is an insulated double wire, and a plurality of electric ignition devices (4) are connected in parallel via the excitation wire (5).

8. The anti-static flexible fracture rock breaking pipe based on plastic oxygenated conduit according to claim 1, characterized in that: The material of the flexible outer shell membrane (7) is one of polypropylene, polyester, nylon, polyvinyl alcohol, polyethylene, and high-density polyethylene.

9. The anti-static flexible fracture rock breaking pipe based on plastic oxygenated conduit according to claim 1, characterized in that: The adsorbent material combustion agent (3) is one or more of carbon black, soot, charcoal, peat, coal dust, peat, sawdust, grass stalks, hemp skin, feather grass, wheat husk, moss, cotton, waste paper scraps, leaf scraps, toilet paper, and aluminum fiber.

10. A rock breaking method, characterized in that: Using the anti-static flexible cracking rock-breaking pipe based on the plastic oxygen-filled conduit according to any one of claims 1 to 9 specifically comprises the following steps: Step 1, drilling a hole in the rock to be fractured and wetting the bottom of the hole; Step 2, placing an anti-static flexible fracture rock-breaking pipe based on a plastic oxygen-filled conduit into a borehole, and leading an excitation wire (5), an exhaust pipe (6), a plastic oxygen-filled conduit (1) and a flexible conductive reinforcement layer (2) out of the borehole; Step 3, using a hole-sealing filler (8) to seal the drilled hole, and wetting the hole-sealing filler (8); Step 4, the plastic oxygenation conduit (1) is connected to the oxygenation pipe network (9) outside the drilled hole, and the flexible conductive reinforcement layer is connected to the ground grounding body (10); Step 5, the oxygenation pipe network (9) outside the hole transports liquid oxygen or pressurized high-purity oxygen into the flexible outer shell (7) through the plastic oxygenation conduit (1), and the adsorbent material combustion agent (3) adsorbs the liquid oxygen or pressurized high-purity oxygen; Step 6, energizing the excitation wire (5), the electric ignition device (4) generates a flame to ignite the adsorption material combustion agent (3), the adsorption material combustion agent (3) burns to release energy to generate high-pressure gas, and the high-pressure gas breaks the rock.

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