Fracturing device and method for refined liquid oxygen blasting

Abstract

The invention discloses a fracturing device for refined liquid oxygen blasting and a working method, solves the problem of low filling efficiency of a fracturing pipe in the prior art, and has the beneficial effect of high liquid oxygen filling efficiency, and the specific scheme is as follows: the fracturing device for refined liquid oxygen blasting comprises an oxygen supply component, the oxygen supply component is communicated with a flow divider, and the flow divider is communicated with the flow divider; the flow divider comprises a supporting frame communicated with the oxygen supply component, the supporting frame supports a plurality of flow dividing pipelines, one end of each flow dividing pipeline is communicated with the supporting frame, the other end of each flow dividing pipeline is communicated with the corresponding fracturing pipe, the flow dividing pipelines are detachably connected with the fracturing pipes, and the fracturing pipes are arranged in blast holes. Flow valves are arranged at the communicating positions of the fracturing pipes and the flow dividing pipelines, the flow valves are connected with a controller to control the amount of liquid oxygen entering the flow dividing pipelines, the fracturing pipes are provided with detonation assemblies, and the detonation assemblies of the fracturing pipes are connected in series.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid oxygen blasting, and in particular to a cracking device and method for refined liquid oxygen blasting. Background Art

[0002] The statements in this part only provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] Liquid oxygen has extremely high oxygen content and extremely low combustion temperature, which can make it react with fuel to achieve an explosion effect. During blasting, liquid oxygen is injected into the drill hole to react with the fuel, generating high temperature and high pressure. The explosion power is large, and it is particularly suitable for engineering projects such as ore rock mining, tunnel excavation, and earthwork excavation.

[0004] The main working principle of liquid oxygen blasting technology is that a large amount of gas is instantaneously vaporized through the phase change of liquid oxygen, and the generated gas forms high pressure and acts on the hole wall. A powerful force is formed on the rock wall through instantaneous pressure relief, producing an effect similar to blasting. The biggest feature of liquid oxygen blasting technology lies in its environmental friendliness. Liquid oxygen is compressed from air and then filled into the cracking device. Usually, after detonation, it releases heat at high speed with the help of oxygen combustion, thus rapidly increasing the temperature. Liquid oxygen instantaneously changes phase into gas state, and the volume can expand by 860 times, generating high-pressure air pressure at the site in the blast hole, thereby causing fragmentation. Liquid oxygen explosives must be used immediately after being prepared and must be used up within one hour after production. Otherwise, the volatilization of liquid oxygen will cause the explosives to fail. Therefore, the liquid oxygen cracking device is usually made on-site. Usually, the liquid oxygen in the liquid oxygen tank is directly introduced into the gun barrel at the site. For the blasting of surrounding rock, multiple gun barrels are required, and liquid oxygen is filled into multiple gun barrels in sequence, resulting in the following problems:

[0005] Filling liquid oxygen one by one has the problem of low work efficiency, and the liquid oxygen cracking device needs to be used as soon as possible after being filled. Obviously, such time is unreliable and will cause the failure of the previously filled several liquid oxygen cracking devices;

[0006] The control of the liquid oxygen amount in each gun barrel mainly depends on the connection time between the liquid oxygen tank and the gun barrel, which is not precise enough. Considering the filling time at the site, usually the filling time of each gun barrel is the same, resulting in the inability to adjust the filling amount according to different surrounding rocks, leading to a relatively large filling amount in some cracking pipes, causing waste and increasing costs;

[0007] After filling liquid oxygen, an exhaust pipe needs to be separately inserted to exhaust gas during explosion. Summary of the Invention

[0008] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a cracking device for refined liquid oxygen blasting, which can simultaneously fill liquid oxygen into multiple cracking pipes, with high filling efficiency and effective control of the filling amount of each cracking pipe.

[0009] To achieve the above object, the present invention is implemented by the following technical solutions:

[0010] A cracking device for refined liquid oxygen blasting, comprising an oxygen supply component, the oxygen supply component is communicated with a shunt, the shunt includes a support frame communicated with the oxygen supply component, the support frame supports a plurality of shunt pipelines, one end of each shunt pipeline is communicated with the support frame, the other end of each shunt pipeline is communicated with a corresponding cracking pipe, the shunt pipeline is detachably connected to the cracking pipe, the cracking pipe is placed in a blast hole, a flow valve is arranged at the connection between the shunt pipeline and the cracking pipe, the flow valve is connected to a controller to control the amount of liquid oxygen entering the shunt pipeline, the cracking pipe is provided with a detonation component, the detonation components of a plurality of cracking pipes are connected in series, and the liquid oxygen inlet of the cracking pipe serves as an exhaust hole.

[0011] For the cracking device as described above, the oxygen supply component is connected to the support frame through a shunt. The setting of the shunt can simultaneously fill liquid oxygen through a plurality of shunt pipelines, greatly improving the filling efficiency on site. A flow valve is arranged at the connection between the cracking pipe and the shunt pipeline to control the amount of liquid oxygen entering each cracking pipe, so as to control the amount of liquid oxygen in the cracking pipes at different positions according to different requirements.

[0012] For a cracking device for refined liquid oxygen blasting as described above, the support frame includes a support disc, the support disc is provided with a plurality of first openings, the shunt pipeline is clamped into the first opening or the shunt pipeline is connected to the first opening through a threaded structure, the support disc is provided with a second opening, the support disc is provided with a plurality of flow channels, and the flow channels communicate the first opening and the second opening. The second opening is communicated with the oxygen supply component as described above. A flow channel is arranged inside the support disc so that liquid oxygen flows through the second opening, passes through the flow channel and the second opening and flows into the shunt pipeline.

[0013] For a cracking device for refined liquid oxygen blasting as described above, considering the use environment of the support frame, usually at the construction site, the ground at the construction site is messy. The support disc is supported by a vertical frame to achieve stable support for the support disc and the shunt pipeline. A lockable roller is arranged at the bottom of the vertical frame. The setting of the roller facilitates the movement of the vertical frame, as well as the support frame and the shunt pipeline. After the roller is locked, stable support for the support frame is achieved.

[0014] For a cracking device for refined liquid oxygen blasting as described above, starting from the support frame, the shunt pipeline includes a first section, a second section and a third section connected in sequence. The second section includes a first reduced diameter section and an enlarged section. The first reduced diameter section is connected to the enlarged section, the first reduced diameter section is connected to the first section, the enlarged section is connected to the third section, the end of the third section far from the second section has a second reduced diameter section, and a check valve is arranged at the end of the second reduced diameter section far from the second section. The setting of the first reduced diameter section is conducive to increasing the flow rate of liquid oxygen, so that liquid oxygen smoothly passes through the enlarged section and the second section and flows into the cracking pipe.

[0015] A fracturing device for refined liquid oxygen blasting as described above, wherein the shunt pipeline is communicated with the fracturing pipe through a connecting pipe, and a flow valve is arranged at the connecting pipe. One end of the connecting pipe is sleeved on the periphery of the shunt pipeline. The connecting pipe includes a hard pipe connected to the shunt pipeline, and the hard pipe is connected to a flexible pipe. The other end of the connecting pipe is detachably connected to the fracturing pipe. After the fracturing pipe is filled, the staff can quickly disconnect the connecting pipe from the fracturing pipe to avoid the connection between the connecting pipe and the fracturing pipe during blasting, so that the shunt can be reused later.

[0016] A fracturing device for refined liquid oxygen blasting as described above, wherein an inlet pipe is arranged at the inlet end of the fracturing pipe, and the connecting pipe is detachably connected to the inlet pipe. The inlet pipe serves as an exhaust pipe during liquid oxygen explosion, and an explosion-proof pressure relief valve is arranged on one side of the inlet pipe, so that part of the fracturing pipe can be inserted into the soil to ensure the stable setting of the fracturing pipe;

[0017] The fracturing pipe includes multiple liquid oxygen sections, and each liquid oxygen section can be connected to the connecting pipe. An air section is arranged between adjacent two liquid oxygen sections, and compressed air is filled in the air section. The arrangement of the air section is beneficial to saving liquid oxygen.

[0018] A fracturing device for refined liquid oxygen blasting as described above, wherein the fracturing pipe includes a pipe body, and an explosion initiation assembly is arranged outside the pipe body. The explosion initiation assembly includes a first ignition head, and the first ignition head is fixed on the outside of the pipe body. The igniter is connected to the controller through a wire, and the controller is connected to a remote controller, and the opening of the igniter is remotely controlled through the remote controller.

[0019] A fracturing device for refined liquid oxygen blasting as described above, wherein the oxygen supply component is connected to the support frame of the shunt through a first pump body, and the oxygen supply component is turned on through the first pump body to pump liquid oxygen into the shunt.

[0020] A fracturing device for refined liquid oxygen blasting as described above, to ensure accurate ignition, a secondary explosion initiation and energy dissipation component is arranged on the fracturing pipe. The secondary explosion initiation and energy dissipation components of multiple fracturing pipes are connected in series, and the secondary explosion initiation and energy dissipation component is connected in series with the explosion initiation component. The detonation time of the secondary explosion initiation and energy dissipation component is greater than the detonation time of the explosion initiation component. The secondary explosion initiation and energy dissipation component includes a second ignition head, and the second ignition head is fixed on the outside of the pipe body. The igniter is connected to the controller through a wire.

[0021] In a second aspect, the present invention provides a working method for a fracturing device for refined liquid oxygen blasting, including the following contents:

[0022] Drill a plurality of blast holes at the position of the surrounding rock to be blasted;

[0023] A detonating assembly is arranged at the fracturing tube, the detonating assemblies of multiple fracturing tubes are connected in series, and a fracturing tube is placed in each blast hole respectively;

[0024] The oxygen supply component is connected to the diverter, and each diverter pipeline in the diverter is connected to the fracturing tube;

[0025] The controller controls the flow valve to open so as to charge the liquid oxygen in the oxygen supply component into the fracturing tube through the shunt pipeline. During the charging process, the amount of liquid oxygen entering the fracturing tube is controlled by the flow valve.

[0026] After the liquid oxygen is filled in the fracturing tube, the connection between the shunt pipeline and the fracturing tube is disconnected, and the liquid oxygen inlet of the fracturing tube is used as an exhaust hole;

[0027] The detonation assembly is controlled by a controller to achieve simultaneous blasting of multiple fracturing tubes.

[0028] The beneficial effects of the present invention are as follows:

[0029] 1) In the fracturing device provided by the present invention, the oxygen supply component is connected to the support frame through a diverter. After the fracturing tube is arranged in the blasthole, the diverter can be arranged to fill the fracturing tube with liquid oxygen through multiple diversion pipelines at the same time, which greatly improves the filling efficiency on site. There is no need to fill the liquid oxygen one by one, and the failure caused by the failure to detonate in time after the liquid oxygen is filled is effectively avoided; a flow valve is arranged at the connection between the fracturing tube and the diversion pipeline to control the amount of liquid oxygen entering each fracturing tube, so that the amount of liquid oxygen in the fracturing tubes at different positions can be controlled according to different needs, and the use cost of liquid oxygen can be effectively controlled.

[0030] 2) After the fracturing tube is filled, the connection between the fracturing tube and the shunt pipeline is released, and the liquid oxygen inlet of the fracturing tube, i.e., the connecting inlet of the shunt pipeline and the fracturing tube, serves as the exhaust hole when the fracturing tube explodes. There is no need to set a separate exhaust hole at the fracturing tube, and the structural setting is simple and reasonable.

[0031] 3) The support frame structure of the present invention is reasonably arranged. The support frame is supported by a vertical frame to facilitate the support frame to remain stable on site. A movable roller is arranged at the bottom of the vertical frame to facilitate the rapid movement of the diverter before and after filling, so as to buy time for rapid blasting. The support frame includes a support plate, and the support plate is provided with a plurality of second openings connected to the oxygen supply component. The second openings are connected to the flow channel, and the flow channel is connected to the first opening, so that the liquid oxygen passes through the second openings, enters the flow channel, and enters the diversion pipeline through the first opening.

[0032] 4) The present invention provides a first reduced diameter section inside the shunt pipeline to increase the flow rate of liquid oxygen, further facilitate rapid filling of liquid oxygen, and further facilitate improvement of work efficiency.

[0033] 5) In the present invention, considering the smooth progress of blasting, a secondary detonation energy-discharging component is provided in the fracturing tube to ensure the smooth detonation of the fracturing tube and avoid the problem of secondary detonation required due to non-detonation. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0035] Figure 1 It is a schematic diagram of a fracturing device for refined liquid oxygen blasting according to one or more embodiments of the present invention.

[0036] Figure 2 It is a schematic diagram of a support plate in a fracturing device for refined liquid oxygen blasting according to one or more embodiments of the present invention.

[0037] Figure 3 It is a schematic diagram of a shunt pipeline in a fracturing device for refined liquid oxygen blasting according to one or more embodiments of the present invention.

[0038] Figure 4 It is a schematic diagram of a fracturing tube in a fracturing device for refined liquid oxygen blasting according to one or more embodiments of the present invention.

[0039] Figure 5 It is a schematic diagram of a vertical frame in a fracturing device for refined liquid oxygen blasting according to one or more embodiments of the present invention.

[0040] Figure 6 It is a flowchart of a working method of a fracturing device for refined liquid oxygen blasting according to one or more embodiments of the present invention.

[0041] In the figures: The distances or dimensions between each part are exaggerated for showing the positions of each part, and the schematic diagrams are only for illustration.

[0042] Among them: 1. Oxygen supply component, 2. First pump body, 3. Shunt, 4. Shunt pipeline, 5. Connecting pipe, 6. Flow valve, 7. Detonation component, 8. Fracturing tube, 9. Vertical frame, 10. Roller;

[0043] 3-1. First opening, 3-2. Flow-through channel, 3-3. Support frame, 3-4. Second opening;

[0044] 4-1. First section, 4-2. First reduced-diameter section, 4-3. Enlarged section, 4-4. Third section, 4-5. Check valve, 4-6. Second reduced-diameter section;

[0045] 5-1. Hard pipe, 5-2. Flexible pipe;

[0046] 8-1. First liquid oxygen section, 8-2. First ignition head, 8-3. Second liquid oxygen section. Detailed implementation

[0047] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0048] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the present invention clearly states otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof;

[0049] As introduced in the background art, in the prior art, the cracking device needs to be filled with liquid oxygen in sequence, resulting in low filling efficiency. To solve the above technical problems, the present invention proposes a cracking device for refined liquid oxygen blasting.

[0050] Embodiment 1

[0051] In a typical embodiment of the present invention, refer to Figure 1 As shown, a cracking device for refined liquid oxygen blasting includes an oxygen supply component 1. The oxygen supply component 1 is connected to a shunt 3. The shunt 3 includes a support frame connected to the oxygen supply component 1. The support frame 3-3 supports a plurality of shunt pipelines 4. One end of each shunt pipeline 4 is connected to the support frame 3-3, and the other end of each shunt pipeline 4 is connected to a corresponding cracking tube 8. The shunt pipeline 4 is detachably connected to the cracking tube 8. The cracking tube 8 is placed in a blast hole. A flow valve 6 is provided at the connection between the cracking tube 8 and the shunt pipeline 4. The flow valve 6 is connected to a controller to control the amount of liquid oxygen entering the shunt pipeline 4, and thus control the amount of liquid oxygen entering the cracking tube 8. The cracking tube 8 is provided with a detonation assembly 7. The detonation assemblies 7 of a plurality of cracking tubes 8 are connected in series. The liquid oxygen inlet of the cracking tube 8 serves as an exhaust hole.

[0052] Among them, the oxygen supply component 1 is a liquid oxygen tank. The oxygen supply component 1 is connected to the support frame 3-3 of the shunt 3 through a first pump body 2 or other pressurizing components. The pressurizing component is connected to the controller. The controller is a PLC controller or other types of controllers. The oxygen supply component 1 is opened through the first pump body 2 to pump liquid oxygen into the shunt 3.

[0053] In some examples, a delivery pipe is further provided on the connecting pipeline between the first pump body 2 and the second opening. The delivery pipe is connected to the anti-static liquid tank through the corresponding second pump body. A delivery pipe flow valve is provided on the delivery pipe, and the delivery pipe flow valve is connected to the controller. The anti-static liquid in the anti-static liquid tank enters the second opening through the second pump body, so that the anti-static liquid enters the fracturing pipe 8.

[0054] It should be noted that the fracturing pipe 8 is a liquid oxygen anti-scratch fracturing pipe and is made of existing materials.

[0055] Reference Figure 2 As shown, the support frame 3-3 includes a support disk. The support disk is provided with a plurality of first openings 3-1. The shunt pipeline 4 is snapped into the first openings 3-1 or the shunt pipeline 4 is connected to the first openings 3-1 through a threaded structure. The number of shunt pipelines 4 is 10-100. The support disk is provided with a second opening. The support disk is provided with a plurality of flow channels 3-2. The flow channels 3-2 communicate the first openings 3-1 and the second opening 3-4. The second opening is connected to the oxygen supply component 1. Flow channels 3-2 are arranged inside the support disk, so that liquid oxygen flows through the second opening, passes through the flow channels and the second opening and flows into the shunt pipeline.

[0056] Specifically, the support disk is circular or oval or strip-shaped or other shapes. The support disk has a set thickness. The first openings 3-1 are arranged along the end face of the support disk. The first openings are arranged in multiple rows and columns or the first openings are arranged in the same circle. At this time, the distance between adjacent two first openings is the same.

[0057] In this embodiment, the shunt pipeline 4 is connected to the first opening 3-1 through a threaded structure, and the first opening is a threaded hole.

[0058] Considering the use environment of the support frame, usually at the construction site, the ground at the construction site is messy. To ensure the stability of the support frame, reference Figure 5 As shown, the support disk is supported by a vertical frame 9 to achieve stable support for the support disk and the shunt pipeline. The vertical frame 9 has a set height. A lockable roller 10 is provided at the bottom of the vertical frame. The setting of the roller 10 facilitates the movement of the vertical frame 9 and the support frame and the shunt pipeline. After the roller 10 is locked, stable support for the support frame is achieved.

[0059] Starting from the support frame, reference Figure 3As shown, the flow splitting pipeline 4 includes a first section 4-1, a second section, and a third section 4-4 connected in sequence. The second section includes a first reduced-diameter section 4-2 and an enlarged section 4-3. The first reduced-diameter section 4-2 is connected to the enlarged section 4-3, the first reduced-diameter section 4-2 is connected to the first section 4-1, and the enlarged section 4-3 is connected to the third section 4-4. The setting of the first reduced-diameter section 4-2 is conducive to increasing the flow rate of liquid oxygen, enabling the liquid oxygen to smoothly pass through the enlarged section and the second section and flow into the fracturing pipe. One end of the third section 4-4 away from the second section has a second reduced-diameter section 4-6, and a check valve 4-5 is provided at one end of the second reduced-diameter section away from the second section. The setting of the second reduced-diameter section is conducive to further increasing the flow rate of liquid oxygen, and the setting of the check valve prevents the liquid oxygen from flowing back.

[0060] It should be noted that the flow splitting pipeline 4 is communicated with the fracturing pipe 8 through a connecting pipe 5. One end of the connecting pipe 5 is sleeved on the periphery of the flow splitting pipeline. The connecting pipe includes a hard pipe 5-1 connected to the flow splitting pipeline. The hard pipe is connected to a flexible pipe 5-2, and the flexible pipe 5-2 is connected to the fracturing pipe 8. A flow valve 6 is provided at the flexible pipe 5-2. The flexible pipe is provided with a third reduced-diameter section to increase the flow rate of liquid oxygen. The other end of the connecting pipe is detachably connected to the fracturing pipe 8. After the filling of the fracturing pipe 8 is completed, the staff can quickly disconnect the connecting pipe from the fracturing pipe to avoid the connection between the connecting pipe and the fracturing pipe during blasting, so that the diverter can be reused later.

[0061] It is easily understood that an inlet pipe is provided at the inlet end of the fracturing pipe 8, and the connecting pipe 5 is detachably connected to the inlet pipe. The inlet pipe serves as an exhaust pipe during the explosion of liquid oxygen. An explosion-proof pressure relief valve is provided on one side of the inlet pipe. The setting of the explosion-proof pressure relief valve can release the overfilled liquid oxygen in time. The standard for each fracturing pipe to release liquid oxygen can be freely adjusted by the explosion-proof pressure relief valve according to the design, effectively releasing energy, improving the energy conversion rate and fracturing power, reducing the overall filling amount, optimizing the design, improving the blasting safety, and realizing fine blasting.

[0062] In this embodiment, refer to Figure 4 As shown, the fracturing pipe includes a pipe body, which is a slender cylindrical pipe. An ignition assembly is arranged outside the pipe body. The ignition assembly 7 includes a first ignition head, which is an existing resistance ignition head. The first ignition head is fixed on the outside of the pipe body. The first ignition head is connected to the controller through a wire, and the controller is connected to the remote control. The opening of the igniter can be remotely controlled through the remote control (electric control igniter), and simultaneous detonation or millisecond interval detonation can be set according to the blasting requirements, and the blasting delay time can be controlled separately.

[0063] To ensure accurate ignition, the fracturing pipe 8 is provided with a secondary detonation energy unloading assembly. The secondary detonation energy unloading assemblies of multiple fracturing pipes are connected in series. The secondary detonation energy unloading assembly is connected in series with the ignition assembly. The detonation time of the secondary detonation energy unloading assembly is greater than that of the ignition assembly. The secondary detonation energy unloading assembly includes a second ignition head, which is fixed on the outside of the pipe body. The igniter is connected to the controller through a wire.

[0064] In some examples, the fracturing tube 8 is a whole tube for filling liquid oxygen.

[0065] In some examples, the fracturing tube 8 includes multiple segments, for example, it can be three segments. As shown in the reference Figure 4 it includes a first liquid oxygen segment 8-1, an air segment 8-2, and a second liquid oxygen segment 8-3. Compressed air is filled into the air segment 8-2 in advance. The inlet pipes are respectively arranged on the first liquid oxygen segment 8-1 and the second liquid oxygen segment 8-3. The inlet pipe of the second liquid oxygen segment is arranged on the side of the pipe body. Liquid oxygen is filled into the first liquid oxygen segment and the second liquid oxygen segment of the fracturing tube respectively through the connecting pipe;

[0066] Of course, in other examples, the fracturing tube can also be provided with multiple air segments. An air segment is arranged between adjacent two liquid oxygen segments. The setting of the air segment is beneficial to saving liquid oxygen, but does not affect the blasting effect. From bottom to top, the explosive charge of the first liquid oxygen segment is M1, and the explosive charge of the second liquid oxygen segment is M2, and so on. M1 + M2 + … + Mn = the total explosive charge M of liquid oxygen. According to the geological structure and the blasting effect requirements for different lithologies, determine the explosive charge of each liquid oxygen segment, thereby determining the opening degree and opening time of the flow valve at the connecting pipe, and determine the compression density of each liquid oxygen segment according to the explosive charge. From bottom to top, the density of liquid oxygen in the first liquid oxygen segment is and so on. r is the radius of the fracturing tube, H1 is the height of the corresponding segment of the fracturing tube. For safety, D1, D2, … Dn are respectively less than 20% of Dmax, and Dmax is the maximum compressive value of the fracturing tube.

[0067] For the fracturing device provided in this embodiment, the oxygen supply component 1 is connected to the support frame 3-3 through the flow divider 3. The setting of the flow divider 3 can fill liquid oxygen through multiple flow dividing pipelines 4 at the same time, greatly improving the filling efficiency on site without individual filling. The flow valve 6 at the connecting pipe controls the amount of liquid oxygen entering each fracturing tube. The fracturing tube 8 is also provided with an explosion-proof pressure relief valve. Thus, under geological conditions and blasting requirements, adjust the filling concentration of each fracturing tube 8. Since the concentration in each fracturing device is different, the liquid oxygen filling can be finely controlled, which is energy-saving, green and environmentally friendly. Thus, according to different requirements, control the amount of liquid oxygen in the fracturing tubes at different positions. The inlet pipe of the fracturing tube serves as its exhaust hole, ensuring the rapid discharge of gas during blasting without the need to separately set an exhaust hole.

[0068] Through the device provided by this embodiment, the liquid oxygen filling amount can be effectively reduced, which is green and environmentally friendly. It can be applied to slope, mine, and urban blasting. It has the characteristics of simple use, optimized reduction of blasting disturbance (about 1 / 5 - 1 / 10 of explosives), low cost, high energy utilization rate, uniform blasting fragmentation, and small sidewall damage. Compared with traditional emulsion explosives, it is more environmentally friendly (no harmful poisonous gas during explosion). Due to its refined fracture control, the disturbance caused is smaller, and it can adjust and optimize the fracture effect in all directions according to actual needs. By simultaneously filling the fracture tubes through a shunt, the technology of multiple initiation points can reduce the large block rate in the blasting area by at least 10%, greatly increase the liquid oxygen filling rate by more than 70%, and save at least 10% of the cost.

[0069] Embodiment Two

[0070] This embodiment provides a working method for a fracture device for refined liquid oxygen blasting. Refer to Figure 6 as shown, including the following contents:

[0071] Drill holes in the surrounding rock. Before blasting design, collect drill hole information in the same blasting area, the distribution of different ore rocks, and on-site geological information, etc. Arrange the blast holes in this area according to the on-site geological conditions and actual needs, and drill multiple blast holes at the positions where the surrounding rock is to be blasted;

[0072] Set detonation components at the fracture tubes. The detonation components of multiple fracture tubes are connected in series, and place the fracture tubes in each blast hole respectively;

[0073] The oxygen supply component is connected to the shunt, and each shunt pipeline in the shunt is connected to the fracture tube;

[0074] The controller controls the flow valve to open to fill the liquid oxygen in the oxygen supply component into the fracture tube through the shunt pipeline. During the filling process, the liquid oxygen amount entering the fracture tube is controlled by the flow valve;

[0075] After the liquid oxygen filling in the fracture tube is completed, disconnect the connection between the shunt pipeline and the fracture tube, and use the liquid oxygen inlet of the fracture tube as the exhaust hole;

[0076] Connect each fracture tube in series to form a detonation network, control the detonation components to work through a remote controller to realize the simultaneous blasting of multiple fracture tubes. The secondary detonation energy dissipation component is connected in series with the detonation component. When the remote controller successfully detonates normally, the first igniter detonates the second igniter. If an accident occurs and normal detonation fails, the secondary detonation energy dissipation component detonates the second igniter to activate the first igniter, so that the liquid oxygen gas undergoes phase change and expansion, instantly forming high-pressure gas in the blast hole to break the rock, eliminating the safety hazards brought by manual operation and liquid oxygen consumption caused by equipment damage through double insurance.

[0077] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A fracturing device for refined liquid oxygen explosion, characterized in that: The invention comprises an oxygen supply component, which is connected with a diverter. The diverter comprises a support frame connected with the oxygen supply component, the support frame supports a plurality of diverter pipelines, one end of each diverter pipeline is connected with the support frame, the other end of each diverter pipeline is connected with a corresponding fracturing tube, the diverter pipeline and the fracturing tube are detachably connected, the fracturing tube is placed in a blast hole, a flow valve is arranged at the connection between the fracturing tube and the diverter pipeline, the flow valve is connected with a controller to control the amount of liquid oxygen entering the diverter pipeline, a detonation assembly is arranged on the fracturing tube, the detonation assemblies of the plurality of fracturing tubes are connected in series, and the liquid oxygen inlet of the fracturing tube is used as an exhaust hole.

2. A fracturing device for refined liquid oxygen explosion according to claim 1, characterized in that: The support frame includes a support plate, the support plate is provided with multiple first openings, the shunt pipeline is inserted into the first opening or the shunt pipeline is connected to the first opening through a threaded structure, the support plate is provided with a second opening, the support plate is provided with multiple flow channels, the flow channels connect the first opening and the second opening, and the second opening is connected to the oxygen supply component.

3. A fracturing device for refined liquid oxygen explosion according to claim 2, characterized in that: The support plate is supported by a vertical frame, and a lockable roller is arranged at the bottom of the vertical frame.

4. A fracturing device for refined liquid oxygen explosion according to claim 1, characterized in that: Starting from the support frame, the shunt pipeline includes a first section, a second section and a third section connected in sequence, the second section includes a first reduced diameter section and an expanded section, the first reduced diameter section is connected to the expanded section, the first reduced diameter section is connected to the first section, the expanded section is connected to the third section, the third section has a second reduced diameter section at one end away from the second section, and a one-way valve is arranged at one end of the second reduced diameter section away from the second section.

5. The fracturing device for refined liquid oxygen explosion according to claim 1, characterized in that: The shunt pipeline is connected to the fracturing pipe through a connecting pipe, the flow valve is arranged at the connecting pipe, one end of the connecting pipe is sleeved on the peripheral side of the shunt pipeline, the connecting pipe comprises a hard pipe connected to the shunt pipeline, the hard pipe is connected to the soft pipe, and the other end of the connecting pipe is detachably connected to the fracturing pipe.

6. A fracturing device for refined liquid oxygen explosion according to claim 5, characterized in that: An inlet pipe is arranged at the inlet end of the fracturing pipe, the connecting pipe is detachably connected to the inlet pipe, the inlet pipe serves as an exhaust pipe in case of liquid oxygen explosion, and an explosion-proof pressure relief valve is arranged on one side of the inlet pipe; The fracturing tube comprises a plurality of liquid oxygen sections, each of which can be connected to the connecting pipe, and an air section is arranged between two adjacent liquid oxygen sections, and the air section is filled with compressed air.

7. The fracturing device for refined liquid oxygen explosion according to claim 1, characterized in that: The fracturing tube comprises a tube body, the detonation assembly is arranged outside the tube body, the detonation assembly comprises a first ignition head, the first ignition head is fixed outside the tube body, the igniter is connected to the controller through a wire, and the controller is connected to the remote controller.

8. The fracturing device for refined liquid oxygen explosion according to claim 1, characterized in that: The oxygen supply component is connected to the support frame of the diverter through the first pump body.

9. A fracturing device for refined liquid oxygen explosion according to claim 7, characterized in that: The fracturing tube is provided with a secondary detonation energy unloading assembly, the secondary detonation energy unloading assemblies of multiple fracturing tubes are connected in series, the secondary detonation energy unloading assembly is connected in series with the detonation assembly, the detonation time of the secondary detonation energy unloading assembly is greater than the detonation time of the detonation assembly, the secondary detonation energy unloading assembly includes a second ignition head, the second ignition head is fixed on the outside of the tube body, and the igniter is connected to the controller through a wire.

10. A working method of a fracturing device for refined liquid oxygen explosion according to any one of claims 1 to 9, characterized in that: It includes the following: Drill multiple blastholes at locations where the surrounding rock is to be blasted; A detonating assembly is arranged at the fracturing tube, the detonating assemblies of multiple fracturing tubes are connected in series, and a fracturing tube is placed in each blast hole respectively; The oxygen supply component is connected to the diverter, and each diverter pipeline in the diverter is connected to the fracturing tube; The controller controls the flow valve to open so as to charge the liquid oxygen in the oxygen supply component into the fracturing tube through the shunt pipeline. During the charging process, the amount of liquid oxygen entering the fracturing tube is controlled by the flow valve. After the liquid oxygen is filled in the fracturing tube, the connection between the shunt pipeline and the fracturing tube is disconnected, and the liquid oxygen inlet of the fracturing tube is used as an exhaust hole; The detonation assembly is controlled by a controller to achieve simultaneous blasting of multiple fracturing tubes.

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