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

Abstract

The invention discloses an anti-static flexible fracturing rock breaking pipe based on a conductive oxygenating conduit, which comprises a flexible outer sleeve film with two closed ends and filled with an adsorbing material combustion agent, and further comprises the conductive oxygenating conduit 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 conductive oxygenation conduit is connected with a conductive unit. The invention further discloses a rock breaking method using the anti-static flexible fracturing rock breaking pipe based on the conductive oxygenating guide pipe, the conductive unit is arranged on the conductive oxygenating guide pipe and makes contact with the ground for conduction, static electricity generated in the filling process of liquid oxygen or pressurized high-purity liquid oxygen can be guided out and eliminated, and the anti-static flexible fracturing rock breaking pipe based on the conductive oxygenating guide pipe can be used for breaking rocks. Static electricity generated in the filling process of liquid oxygen or high-purity liquid oxygen with pressure can be conducted away and eliminated more efficiently, timely and continuously, and the risk of safety accidents caused by the static electricity is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of rock breaking, and specifically relates to an anti-static flexible fracturing rock-breaking pipe based on a conductive oxygen-filling pipe. 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 a fracturing rock-breaking pipe (or called explosive package) placed in a borehole, static electricity will be generated. If the static electricity accumulation reaches a certain level, it is very likely to trigger an uncontrollable explosion accident, posing a serious threat to the lives of operating personnel and surrounding facilities and objects. 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] Currently, existing ordinary fracturing 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 fracturing rock-breaking pipe based on a conductive oxygen-filling pipe, which can effectively 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 fracturing rock-breaking pipe based on a conductive 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 conductive 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; A conductive unit is arranged on the outer wall of the conductive oxygen-filling pipe.

[0008] The features of the present invention also lie in that: The conductive unit includes a ground grounding body, and the ground grounding body is arranged outside the flexible outer membrane.

[0009] The conductive unit includes a bottom-hole grounding body, and the bottom-hole grounding body is fixed at the bottom of the conductive oxygen-filling conduit inside the flexible outer membrane, and it passes through the bottom of the flexible outer membrane.

[0010] The pipe section of the conductive oxygen-filling conduit located inside the flexible outer membrane is J-shaped, and fine holes are evenly formed in the pipe wall, and the bottom-hole grounding body is arranged at the bottom of the vertical section of the J-shaped pipe.

[0011] The conductive oxygen-filling conduit is made of a metal pipe or a carbon fiber pipe.

[0012] The metal pipe is made of aluminum, copper or corrugated steel pipe.

[0013] There are multiple electric ignition devices, the excitation wire adopts an 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 or high-density polyethylene.

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

[0016] Another technical solution adopted by the present invention is a rock-breaking method, using the above-mentioned anti-static flexible fracturing rock-breaking pipe based on a conductive oxygen-filling 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, put the anti-static flexible fracturing rock-breaking pipe based on the conductive oxygen-filling conduit into the hole, the bottom-hole grounding body contacts the bottom surface of the hole, and lead out the excitation wire, the exhaust pipe and the conductive oxygen-filling conduit out of the hole; Step 3, use a hole-sealing plugging body to plug the hole and moisten the hole-sealing plugging body; Step 4, connect the conductive oxygen-filling conduit outside the hole to the oxygen-filling pipe network outside the hole, and contact the ground grounding body with the ground; Step 5, the oxygen-filling pipe network outside the hole transports liquid oxygen or pressurized high-purity oxygen into the flexible outer membrane through the conductive oxygen-filling conduit, and the adsorbent material combustion agent adsorbs the liquid oxygen or pressurized high-purity oxygen; Step 6, energize the excitation wire, the electric ignition device generates a flame to ignite the adsorbent material combustion agent, and the adsorbent material combustion agent burns to release energy to 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 conductive unit on the conductive oxygen - filling conduit, the conductive oxygen - filling conduit itself and the conductive unit provided thereon come into contact with the ground to form a conductive path, thereby safely releasing the static electricity generated during the filling of liquid oxygen or pressurized high - purity liquid oxygen. Compared with the existing rock - fracturing pipes, it can more efficiently, timely, and continuously conduct away the static electricity generated during the filling process of liquid oxygen or pressurized high - purity liquid oxygen, 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 rock - fracturing pipe based on the conductive oxygen - filling conduit of the present invention.

[0019] In the figure, 1 is the oxygen - filling conduit, 2 is the adsorbent material combustion agent, 3 is the electric ignition device, 4 is the excitation wire, 5 is the exhaust pipe, 6 is the flexible outer membrane, 7 is the bottom - hole grounding body, 8 is the hole - sealing stuffing body, 9 is the oxygen - filling pipe network outside the hole, and 10 is the ground grounding body. Detailed Embodiments

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

[0021] Embodiment 1 An anti - static flexible rock - fracturing pipe based on a conductive oxygen - filling conduit of the present invention, as Figure 1 shown, includes a flexible outer membrane 6. The flexible outer membrane 6 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, and both the orifice end and the bottom end of the flexible outer membrane 6 are closed. It is filled with an adsorbent material combustion agent 2. The adsorbent material combustion agent 2 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 shapes, or fine - particle organic compounds. During use, the flexible outer membrane 6 filled with the adsorbent material combustion agent 2 is placed in a borehole drilled in the rock to be fractured. The flexible outer membrane 6 fits along the inner wall of the borehole, and the height of the flexible outer membrane 6 is less than the height of the borehole. Then, the hole - sealing stuffing body 8 is used to seal the borehole.

[0022] It also includes an oxygen - filling conduit 1, an exhaust pipe 5 and a detonation device; the oxygen - filling conduit 1 is made of a conductive pipe material that is resistant to low temperatures and has good ductility and flexibility. One end penetrates through the top of the flexible outer membrane 6 and extends into the flexible outer membrane 6, and the other end is led out of the borehole. The end led out of the borehole is connected to an external - bore oxygen - filling pipe network 9. The external - bore oxygen - filling pipe network 9 is used to transport liquid oxygen or pressurized high - purity oxygen into the oxygen - filling conduit 1. The outer wall of the pipeline of the oxygen - filling conduit 1 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 borehole.

[0023] One end of the exhaust pipe 5 penetrates through the top of the flexible outer membrane 6 and extends into the flexible outer membrane 6, and the other end is led out of the borehole. The exhaust pipe 5 remains unobstructed to dynamically balance the internal and external air pressures of the fracturing and rock - breaking pipe. The exhaust pipe 5 is made of a pipe material that is resistant to low temperatures and has a certain degree of flexibility.

[0024] The detonation device includes an excitation wire 4. One end of it penetrates through the top of the flexible outer membrane 6 and extends into the flexible outer membrane 6 and contacts the adsorbent material combustion agent 2. The part of the excitation wire 4 located inside the flexible outer membrane 6 is connected to an electric ignition device 3, and the electric ignition device 3 contacts the adsorbent material combustion agent 2. During use, the excitation wire 4 is electrified, thereby exciting the electric ignition device 3 to generate a spark and ignite the adsorbent material combustion agent 2.

[0025] Embodiment 2 A kind of anti - static flexible fracturing and rock - breaking pipe based on a conductive oxygen - filling conduit of the present invention, as Figure 1 shown, includes a flexible outer membrane 6. The flexible outer membrane 6 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 6 are closed, and it is filled with an adsorbent material combustion agent 2. The adsorbent material combustion agent 2 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 shapes, or fine - particle organic compounds. During use, the flexible outer membrane 6 filled with the adsorbent material combustion agent 2 is placed in a borehole drilled in the rock to be fractured. The flexible outer membrane 6 fits along the inner wall of the borehole, and the height of the flexible outer membrane 6 is less than the height of the borehole. Then, the borehole is plugged with a hole - sealing plugging body 8.

[0026] It also includes an oxygen - filling conduit 1, an exhaust pipe 5 and a detonating device; the oxygen - filling conduit 1 is made of a conductive pipe material that is resistant to low temperatures and has good ductility and flexibility. One end penetrates through the top of the flexible outer membrane 6 and extends into the flexible outer membrane 6, and the other end is led out of the borehole. The end led out of the borehole is connected to an oxygen - filling pipe network 9 outside the hole. The oxygen - filling pipe network 9 outside the hole is used to transport liquid oxygen or pressurized high - purity oxygen into the oxygen - filling conduit 1. The outer wall of the pipeline of the oxygen - filling conduit 1 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.

[0027] The oxygen - filling conduit 1 is arranged at the axial center line position of the flexible outer membrane 6. The end of the pipeline located inside the flexible outer membrane 6 bends upward to form a J - shape, which is convenient for liquid oxygen or pressurized high - purity oxygen to quickly fill the adsorbent material fuel 2 from bottom to top. The vertical pipe end of the J - shaped pipeline is fixed with a bottom - hole grounding body 7. The end of the bottom - hole grounding body 7 far from the oxygen - filling conduit 1 extends out of the bottom end of the flexible outer membrane 6 and contacts the bottom - hole earth, which is used to conduct the oxygen - filling conduit 1 to the earth. Both the ground grounding body 10 and the bottom - hole grounding body 7 are made of metal materials to timely conduct the static electricity generated during the filling process of the oxygen - filling conduit 1 to the earth and avoid static electricity accumulation.

[0028] One end of the exhaust pipe 5 penetrates through the top of the flexible outer membrane 6 and extends into the flexible outer membrane 6, and the other end is led out of the borehole. The exhaust pipe 5 remains unobstructed to dynamically balance the internal and external air pressures of the fracturing and rock - breaking pipe. The exhaust pipe 5 is made of a pipe material that is resistant to low temperatures and has a certain flexibility.

[0029] The detonating device includes an excitation wire 4. One end of it penetrates through the top of the flexible outer membrane 6 and extends into the flexible outer membrane 6 and contacts the adsorbent material fuel 2. The part of the excitation wire 4 located inside the flexible outer membrane 6 is connected to an electric ignition device 3, and the electric ignition device 3 contacts the adsorbent material fuel 2. During use, the excitation wire 4 is electrified, and then the electric ignition device 3 is excited to generate a spark to ignite the adsorbent material fuel 2.

[0030] Embodiment 3 A flexible fracturing and rock - breaking pipe with anti - static function based on a conductive oxygen - filling conduit according to the present invention, as Figure 1As shown in the figure, it includes a flexible outer membrane 6, 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. Both the orifice end and the bottom end of the flexible outer membrane 6 are closed, and it is filled with an adsorbent material combustion agent 2. The adsorbent material combustion agent 2 is made of materials 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 shapes, or fine-grained organic synthetic materials. During use, the flexible outer membrane 6 filled with the adsorbent material combustion agent 2 is placed in a borehole drilled in the rock to be fractured. The flexible outer membrane 6 fits along the inner wall of the borehole, and the height of the flexible outer membrane 6 is less than the height of the borehole. Then, a hole-sealing plugging body 8 is used to seal the borehole.

[0031] It also includes an oxygen-filling conduit 1, an exhaust pipe 5, and a detonating device. The oxygen-filling conduit 1 is made of a conductive pipe material that is resistant to low temperatures and has good ductility and flexibility. Preferably, it is a carbon fiber pipe or a metal pipe. The metal pipe can be made of aluminum, copper, or corrugated steel pipe. One end penetrates through the top of the flexible outer membrane 6 and extends into the flexible outer membrane 6, and the other end is led out of the borehole. The end led out of the borehole is connected to an external oxygen-filling pipe network 9, which is used to transport liquid oxygen or pressurized high-purity oxygen into the oxygen-filling conduit 1. The outer wall of the oxygen-filling conduit 1 pipeline led out of the borehole is also connected to a ground grounding body 10, which is grounded on the surface outside the borehole.

[0032] The oxygen-filling conduit 1 is arranged at the axial center line position of the flexible outer membrane 6. The end of the oxygen-filling conduit 1 located inside the flexible outer membrane 6 bends upward to form a J shape, which is convenient for liquid oxygen or pressurized high-purity oxygen to quickly fill the adsorbent material combustion agent 2 from bottom to top. A bottom-hole grounding body 7 is fixed at the end of the vertical pipe of the J-shaped pipeline. The end of the bottom-hole grounding body 7 far from the oxygen-filling conduit 1 extends out of the bottom end of the flexible outer membrane 6 and contacts the bottom-hole ground, which is used to conduct the oxygen-filling conduit 1 to the ground. The ground grounding body 10 and the bottom-hole grounding body 7 are used to timely conduct the static electricity generated during the filling process of the oxygen-filling conduit 1 to the ground to avoid static electricity accumulation.

[0033] One end of the exhaust pipe 5 penetrates through the top of the flexible outer membrane 6 and extends into the flexible outer membrane 6, and the other end is led out of the borehole. The exhaust pipe 5 remains unobstructed to dynamically balance the internal and external air pressures of the rock fracturing pipe. The exhaust pipe 5 is made of a pipe material with a certain flexibility and resistance to low temperatures.

[0034] The detonating device includes an exciting wire 4, one end of which penetrates through the top of the flexible outer membrane 6 and extends into the flexible outer membrane 6 to contact the adsorbent material fuel 2. The part of the exciting wire 4 located inside the flexible outer membrane 6 is connected to an electric ignition device 3, and the electric ignition device 3 contacts the adsorbent material fuel 2. During use, the exciting wire 4 is electrified, thereby exciting the electric ignition device 3 to generate a spark and ignite the adsorbent material fuel 2.

[0035] Example 4 An anti-static flexible rock-breaking pipe based on a conductive oxygen-filling pipe according to the present invention, as Figure 1 shown, includes a flexible outer membrane 6. The flexible outer membrane 6 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 6 are closed, and it is filled with an adsorbent material fuel 2. The adsorbent material fuel 2 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 husks, moss, cotton, waste paper scraps, leaf scraps, toilet paper, aluminum fibers, porous soft shapes, or fine-grained organic compounds. During use, the flexible outer membrane 6 filled with the adsorbent material fuel 2 is placed in a drill hole dug in the rock to be broken. The flexible outer membrane 6 fits along the inner wall of the drill hole, and the height of the flexible outer membrane 6 is less than the height of the drill hole. Then, a hole-sealing plugging body 8 is used to plug the drill hole.

[0036] It also includes an oxygen-filling pipe 1, an exhaust pipe 5, and a detonating device. The oxygen-filling pipe 1 is a conductive pipe material that is resistant to low temperatures and has good ductility and flexibility. Preferably, it is a carbon fiber pipe or a metal pipe. The metal pipe can be made of aluminum, copper, or corrugated steel pipe. One end penetrates through the top of the flexible outer membrane 6 and extends into the flexible outer membrane 6, and the other end is led out of the drill hole. The end led out of the drill hole is connected to an external-hole oxygen-filling pipe network 9, and the external-hole oxygen-filling pipe network 9 is used to transport liquid oxygen or pressurized high-purity oxygen into the oxygen-filling pipe 1. The outer wall of the oxygen-filling pipe 1 pipeline 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 outside the hole.

[0037] The oxygen-filling pipe 1 is arranged at the axial center line position of the flexible outer membrane 6. The end of the oxygen-filling pipe 1 located inside the flexible outer membrane 6 bends upward to form a J shape, which is convenient for liquid oxygen or pressurized high-purity oxygen to quickly fill the adsorbent material fuel 2 from bottom to top. The vertical pipe end of the J-shaped pipeline is fixed with a bottom-hole grounding body 7. The end of the bottom-hole grounding body 7 away from the oxygen-filling pipe 1 extends out of the bottom end of the flexible outer membrane 6 and contacts the bottom-hole earth, which is used to conduct the oxygen-filling pipe 1 to the earth. The ground grounding body 10 and the bottom-hole grounding body 7 are used to timely conduct the static electricity generated during the filling process of the oxygen-filling pipe 1 to the earth to avoid static electricity accumulation.

[0038] The oxygen - filling conduit 1 is the inner - pipe section within the flexible outer membrane 6, and a number of small holes are evenly opened on the pipe wall, so as to adapt to the filling of liquid oxygen or pressurized high - purity oxygen, and enable the liquid oxygen or pressurized high - purity oxygen to fully contact with the adsorbent material combustion agent 2 within the flexible outer membrane 6.

[0039] One end of the exhaust pipe 5 penetrates through the top end of the flexible outer membrane 6 and extends into the flexible outer membrane 6, and the other end leads out of the drill hole. The exhaust pipe 5 remains unobstructed to dynamically balance the internal and external air pressures of the rock - fracturing pipe by explosion. The exhaust pipe 5 is made of a low - temperature - resistant and somewhat flexible pipe material.

[0040] The detonation device includes an excitation wire 4. One end of the excitation wire 4 penetrates through the top of the flexible outer membrane 6 and extends into the flexible outer membrane 6 and contacts the adsorbent material combustion agent 2. The part of the excitation wire 4 located within the flexible outer membrane 6 is connected to an electric ignition device 3, and the electric ignition device 3 contacts the adsorbent material combustion agent 2. During use, the excitation wire 4 is electrified, thereby exciting the electric ignition device 3 to generate a spark and ignite the adsorbent material combustion agent 2.

[0041] Example 5 An anti - static flexible rock - fracturing pipe based on a conductive oxygen - filling conduit according to the present invention, as Figure 1 shown, includes a flexible outer membrane 6. The flexible outer membrane 6 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 6 are closed, and an adsorbent material combustion agent 2 is filled therein. The adsorbent material combustion agent 2 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 skin, 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 6 filled with the adsorbent material combustion agent 2 is placed in a drill hole dug in the rock to be fractured. The flexible outer membrane 6 fits along the inner wall of the drill hole, and the height of the flexible outer membrane 6 is less than the height of the drill hole. Then, a hole - sealing plugging body 8 is used to plug the drill hole.

[0042] It also includes an oxygen - filling conduit 1, an exhaust pipe 5, and a detonation device; the oxygen - filling conduit 1 is made of a conductive pipe material that is resistant to low temperatures and has good ductility and flexibility. Preferably, it is a carbon fiber pipe or a metal pipe. The metal pipe can be made of aluminum, copper, or corrugated steel pipe. One end penetrates through the top of the flexible outer membrane 6 and extends into the flexible outer membrane 6, and the other end is led out of the borehole. The end led out of the borehole is connected to an external - borehole oxygen - filling pipe network 9. The external - borehole oxygen - filling pipe network 9 is used to transport liquid oxygen or pressurized high - purity oxygen into the oxygen - filling conduit 1. The outer wall of the oxygen - filling conduit 1 pipeline 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 borehole.

[0043] The oxygen - filling conduit 1 is arranged at the axial center line position of the flexible outer membrane 6. The end of the part located inside the flexible outer membrane 6 bends upward to form a J - shape, which is convenient for liquid oxygen or pressurized high - purity oxygen to quickly fill the adsorbent material combustion agent 2 from bottom to top. The vertical pipe end of the J - shaped pipeline is fixed with a bottom - hole grounding body 7. One end of the bottom - hole grounding body 7 far from the oxygen - filling conduit 1 extends out of the bottom end of the flexible outer membrane 6 and contacts the bottom - hole earth, which is used to conduct the oxygen - filling conduit 1 to the earth. The ground grounding body 10 and the bottom - hole grounding body 7 are used to timely conduct the static electricity generated during the filling process of the oxygen - filling conduit 1 into the earth to avoid static electricity accumulation.

[0044] The pipe section of the oxygen - filling conduit 1 inside the flexible outer membrane 6 is evenly provided with a number of small holes on the pipe wall, so as to adapt to the filling of liquid oxygen or pressurized high - purity oxygen and allow the liquid oxygen or pressurized high - purity oxygen to fully contact the adsorbent material combustion agent 2 inside the flexible outer membrane 6.

[0045] One end of the exhaust pipe 5 penetrates through the top of the flexible outer membrane 6 and extends into the flexible outer membrane 6, and the other end is led out of the borehole. The exhaust pipe 5 remains unobstructed to dynamically balance the internal and external air pressures of the fracturing rock - breaking pipe. The exhaust pipe 5 is made of a pipe material that is resistant to low temperatures and has a certain flexibility.

[0046] The detonation device includes an excitation wire 4. One end of it penetrates through the top of the flexible outer membrane 6 and extends into the flexible outer membrane 6 and contacts the adsorbent material combustion agent 2. The part of the excitation wire 4 located inside the flexible outer membrane 6 is connected to an electric ignition device 3, and the electric ignition device 3 contacts the adsorbent material combustion agent 2. There are multiple electric ignition devices 3, which are evenly dispersed inside the flexible outer membrane 6 and contact the adsorbent material combustion agent 2. During use, the excitation wire 4 is electrified, and then the electric ignition device 3 is excited to generate a spark to ignite the adsorbent material combustion agent 2.

[0047] Example 6 An anti - static flexible fracturing rock - breaking pipe based on a conductive oxygen - filling conduit according to the present invention, as Figure 1As shown in the figure, it includes a flexible outer membrane 6, 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 6 are both closed, and it is filled with an adsorbent material combustion agent 2. The adsorbent material combustion agent 2 is made of materials 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 shapes, or fine-grained organic compounds. During use, the flexible outer membrane 6 filled with the adsorbent material combustion agent 2 is placed in a borehole drilled in the rock to be fractured. The flexible outer membrane 6 adheres to the inner wall of the borehole, and the height of the flexible outer membrane 6 is less than the height of the borehole. Then, a hole-sealing plugging body 8 is used to seal the borehole.

[0048] It also includes an oxygen-filling conduit 1, an exhaust pipe 5, and a detonating device. The oxygen-filling conduit 1 is made of a conductive pipe material that is resistant to low temperatures and has good ductility and flexibility. Preferably, it is a carbon fiber pipe or a metal pipe. The metal pipe can be made of aluminum, copper, or corrugated steel pipe. One end penetrates through the top of the flexible outer membrane 6 and extends into the flexible outer membrane 6, and the other end is led out of the borehole. The end led out of the borehole is connected to an external oxygen-filling pipe network 9, which is used to transport liquid oxygen or pressurized high-purity oxygen into the oxygen-filling conduit 1. The outer wall of the oxygen-filling conduit 1 pipeline 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 borehole.

[0049] The oxygen-filling conduit 1 is arranged at the axial center line position of the flexible outer membrane 6. The end of the pipeline located inside the flexible outer membrane 6 bends upward to form a J shape, which is convenient for liquid oxygen or pressurized high-purity oxygen to quickly fill the adsorbent material combustion agent 2 from bottom to top. A bottom-hole grounding body 7 is fixed at the end of the vertical pipe of the J-shaped pipeline. The end of the bottom-hole grounding body 7 away from the oxygen-filling conduit 1 extends out of the bottom end of the flexible outer membrane 6 and contacts the bottom-hole ground, which is used to conduct the oxygen-filling conduit 1 to the ground. The ground grounding body 10 and the bottom-hole grounding body 7 are used to timely conduct the static electricity generated during the filling process of the oxygen-filling conduit 1 to the ground to avoid static electricity accumulation.

[0050] For the pipe section of the oxygen-filling conduit 1 inside the flexible outer membrane 6, a number of small holes are evenly opened on the pipe wall to adapt to the filling of liquid oxygen or pressurized high-purity oxygen, so that the liquid oxygen or pressurized high-purity oxygen can fully contact the adsorbent material combustion agent 2 inside the flexible outer membrane 6.

[0051] One end of the exhaust pipe 5 penetrates through the top of the flexible outer membrane 6 and extends into the flexible outer membrane 6, and the other end is led out of the borehole. The exhaust pipe 5 remains unobstructed to dynamically balance the internal and external air pressures of the rock-breaking pipe by blasting. The exhaust pipe 5 is made of a pipe material with certain flexibility that is resistant to low temperatures.

[0052] The detonating device includes an exciting wire 4, one end of which penetrates through the top of the flexible outer membrane 6 and extends into the flexible outer membrane 6 to contact the adsorbent material combustion agent 2. The part of the exciting wire 4 located inside the flexible outer membrane 6 is connected with an electric ignition device 3, and the electric ignition device 3 contacts the adsorbent material combustion agent 2. There are multiple electric ignition devices 3, which are evenly dispersed inside the flexible outer membrane 6 and contact the adsorbent material combustion agent 2. The exciting wire 4 adopts an insulated twin wire, and multiple electric ignition devices 3 are connected in parallel through the exciting wire 4. When in use, the exciting wire 4 is electrified, thereby exciting the electric ignition device 3 to generate a spark and ignite the adsorbent material combustion agent 2.

[0053] The present invention also discloses a method for rock breaking using the above-mentioned anti-static flexible rock-breaking pipe based on a conductive oxygen-filled pipe, which specifically includes the following steps: Step 1, drill a hole in the rock to be fractured and wet the bottom of the hole. Step 2, place the above-mentioned anti-static flexible rock-breaking pipe based on a conductive oxygen-filled pipe into the hole, and keep the ends of the oxygen-filled pipe 1, the exciting wire 4, and the exhaust pipe 5 outside the hole. The bottom-hole grounding body 7 contacts the bottom surface of the hole to ensure that the bottom-hole grounding body 7 of the rock-breaking pipe is electrically connected to the bottom of the hole. Step 3, use a hole-sealing plugging body 8 to plug the hole and wet the hole-sealing plugging body 8 to increase the humidity of the hole-sealing plugging body 8, so as to ensure that the section of the oxygen-filled pipe located inside the hole-sealing plugging body 8 is electrically connected to the hole-sealing plugging body 8 and the earth. The exciting wire 4, the exhaust pipe 5, and the oxygen-filled pipe 1 all pass through the hole-sealing plugging body 8 and extend out of the hole. Step 4, connect the outer-end part of the oxygen-filled pipe 1 to an external oxygen-filled pipe network 9 outside the hole, and connect the ground grounding body 10 to the ground and conduct electricity. Step 5, the external oxygen-filled pipe network 9 conveys liquid oxygen or pressurized high-purity oxygen to the oxygen-filled pipe 1, and the adsorbent material combustion agent 2 adsorbs the liquid oxygen or pressurized high-purity oxygen. Step 6, electrify the exciting wire 4, the electric ignition device 3 generates a spark to ignite the adsorbent material combustion agent 2, and the adsorbent material combustion agent 2 burns to release energy to generate high-pressure gas, and the high-pressure gas breaks the rock after being released.

[0054] The method of the present invention sets a conductive unit on the conductive oxygen-filled pipe. An oxygen-filled conduit is fixed with a bottom-hole grounding body in the drill hole, and the bottom-hole grounding body is connected and conductive to the ground; the oxygen-filled conduit outside the drill hole is connected to a ground grounding body on the ground, and the ground grounding body is connected and conductive to the ground; at the same time, the hole-sealing plugging body is wetted to ensure that the oxygen-filled conduit is conductive to the hole-sealing plugging body. In this way, a complete conductive path is formed both inside and outside the rock fracturing pipe, so as to conduct the static electricity generated during the filling process of liquid oxygen or pressurized high-purity liquid oxygen. Compared with the existing ordinary similar rock fracturing pipes, it can conduct 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 conductive oxygen-filled conduit, characterized in that: It comprises a flexible outer membrane (6) with closed ends and filled with an adsorbent material combustion agent (2) inside, and also comprises a conductive oxygen-filled conduit (1), an excitation wire (4) and an exhaust pipe (5) penetrating from the top of the flexible outer membrane (6) into the flexible outer membrane (6); The excitation wire (4) is connected to an electric ignition device (3), and the electric ignition device (3) is located inside the flexible outer film (6) and in contact with the adsorption material combustion agent (2); The outer wall of the conductive oxygenation conduit (1) is connected to a conductive unit.

2. The anti-static flexible fracture rock breaking pipe based on conductive oxygen-filled conduit according to claim 1 is characterized in that: The conductive unit comprises a ground grounding body (10), and the ground grounding body (10) is arranged outside the flexible outer shell membrane (6).

3. The anti-static flexible fracture rock breaking pipe based on conductive oxygen-filled conduit according to claim 1 is characterized in that: The conductive unit comprises a hole bottom grounding body (7), which is fixed to the bottom of a conductive oxygen-filled conduit (1) inside the flexible outer shell membrane (6) and passes through the bottom of the flexible outer shell membrane (6).

4. The anti-static flexible fracture rock breaking pipe based on conductive oxygen-filled conduit according to claim 3 is characterized in that: The section of the conductive oxygen-filled conduit (1) located inside the flexible outer membrane (6) is J-shaped, and fine holes are evenly opened on the tube wall. A hole bottom grounding body (7) is arranged at the bottom of the vertical section of the J-shaped tube.

5. The anti-static flexible fracture rock breaking pipe based on a conductive oxygen-filled conduit according to any one of claims 1 to 4, characterized in that: The conductive oxygen-filled conduit (1) is a metal tube or a carbon fiber tube.

6. The anti-static flexible fracture rock breaking pipe based on conductive oxygen-filled conduit according to claim 5 is characterized in that: The metal pipe is aluminum, copper or a corrugated steel pipe.

7. The anti-static flexible fracture rock breaking pipe based on conductive oxygen-filled conduit according to claim 6 is characterized in that: The electric ignition device (3) has a plurality of excitation wires (4) which are insulated double wires, and the plurality of electric ignition devices (3) are connected in parallel via the excitation wires (4).

8. The anti-static flexible fracture rock breaking pipe based on conductive oxygen-filled conduit according to claim 1 is characterized in that: The material of the flexible outer shell membrane (6) is one of polypropylene, polyester, nylon, polyvinyl alcohol, polyethylene or high-density polyethylene.

9. The anti-static flexible fracture rock breaking pipe based on conductive oxygen-filled conduit according to claim 1 is characterized in that: The adsorbent combustion agent (2) is one or more of carbon black, soot, charcoal, peat, coal dust, peat, sawdust, straw, 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 fracture rock breaking pipe based on the conductive 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 conductive oxygen-filled conduit into the borehole, contacting the bottom grounding body (7) with the ground at the bottom of the hole, and leading the excitation wire (4), the exhaust pipe (5) and the conductive oxygen-filled conduit (1) 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 conductive oxygen-filled conduit (1) is connected to the oxygen-filled pipe network (9) outside the drilled hole, and the ground grounding body (10) is in contact with the ground; Step 5, the oxygen filling pipe network (9) outside the hole transports liquid oxygen or pressurized high-purity oxygen into the flexible outer shell (6) through the conductive oxygen filling conduit (1), and the adsorbent material combustion agent (2) adsorbs the liquid oxygen or pressurized high-purity oxygen; Step 6, energizing the excitation wire (4), the electric ignition device (3) generates a flame to ignite the adsorption material combustion agent (2), the adsorption material combustion agent (2) burns to release energy to generate high-pressure gas, and the high-pressure gas breaks the rock.

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