Full-hole-section blasting anti-reflection device and method

Abstract

The invention provides a full-hole-section blasting anti-reflection device and method. The full-hole-section blasting anti-reflection device comprises a blaster, the blaster comprises a blasting pipe, a detonating piece and a wire, the blasting pipe is used for containing liquid carbon dioxide, the detonating piece is arranged in the blasting pipe and used for enabling the liquid carbon dioxide to expand and burst the blasting pipe, and the wire is connected with the detonating piece and used for exciting the detonating piece. According to the full-hole-section blasting anti-reflection device, the detonating piece is excited to enable the liquid carbon dioxide to expand and burst the blasting pipe, then the length part, provided with the blasting pipe, of the drill hole can be fractured, full-hole-section blasting anti-reflection can be conducted on the drill hole, meanwhile, the blaster is simple in structure, the weight is light, and the anti-reflection effect is good. In addition, due to the fact that the blasting pipe is broken by carbon dioxide and does not need to be recycled, the blaster can be used as a disposable consumable and does not need to be recycled, construction procedures are simplified, and use is convenient.

Description

Technical Field

[0001] This invention relates to the field of coal mining, specifically to a full-hole section blasting permeability enhancement device and method. Background Technology

[0002] Blasting permeability enhancement is a method that uses blasting technology to artificially create fractures to improve the permeability of low-permeability coal seams, effectively improving gas extraction efficiency and ensuring mine safety. Carbon dioxide blasting permeability enhancement is one such method. In related technologies, the carbon dioxide blaster is equipped with a release head or release pipe at its end. The energy generated by the blast is released through the release head or release pipe, creating fractures at the bottom of the borehole to enhance permeability. However, since the fractures only form at the bottom of the borehole, the permeability enhancement range is limited and the effect is not significant. Furthermore, the carbon dioxide blaster in these technologies has a complex structure and is heavy, making it inconvenient to assemble and insert into the borehole. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, embodiments of the present invention propose a full-hole section blasting penetration enhancement device and a full-hole section blasting penetration enhancement method based on the full-hole section blasting penetration enhancement device.

[0005] The full-hole section blasting penetration enhancement device of this invention includes: A blasting device, comprising a blasting tube, an initiator, and a wire, wherein the blasting tube is used to contain liquid carbon dioxide, the initiator is disposed inside the blasting tube and is used to cause the liquid carbon dioxide to expand and rupture the blasting tube, and the wire is connected to the initiator and is used to activate the initiator.

[0006] The full-section blasting permeability enhancement device of this invention uses an initiator to cause liquid carbon dioxide to expand and rupture the blasting tube, thereby fracturing the entire length of the borehole with the blasting tube. This enables full-section blasting permeability enhancement of the borehole. The blaster has a simple structure and is lightweight, making it easy to assemble and insert into the borehole. Furthermore, since the blasting tube is ruptured by carbon dioxide, it does not need to be recycled, allowing the blaster to be used as a disposable consumable, simplifying the construction process and making it easy to use.

[0007] In some embodiments, the rupture tube is a polyethylene tube or a thin-walled steel tube.

[0008] In some embodiments, the rupture tube is a polyethylene tube, the wall thickness of the rupture tube is 3mm to 5mm, and / or the maximum pressure bearing capacity of the rupture tube is 2MPa to 3MPa.

[0009] In some embodiments, the rupture tube is provided with a filling port for filling the rupture tube with liquid carbon dioxide.

[0010] In some embodiments, the wire extends outside the blasting tube, or the blasting tube is provided with a terminal block, and the wire connects the terminal block and the detonator.

[0011] In some embodiments, the detonator is used to generate heat to vaporize liquid carbon dioxide, thereby expanding and rupturing the rupture tube.

[0012] In some embodiments, the detonator includes a housing and an electric igniter. The housing contains a heating agent, and the electric igniter is disposed within the housing and surrounded by the heating agent. The electric igniter is connected to the wire for igniting the heating agent to generate heat.

[0013] In some embodiments, the housing is made of a PE composite substrate film.

[0014] In some embodiments, the full-hole section blasting penetration enhancement device further includes a liquid storage container, a liquid supply pipe, and a detonator. The liquid storage container is used to store liquid carbon dioxide, the liquid supply pipe is used to connect the liquid storage container and the blasting pipe to supply the liquid carbon dioxide in the liquid storage container into the blasting pipe, and the detonator is used to be electrically connected to the wire and can activate the detonator.

[0015] The full-hole section blasting penetration enhancement method of this invention is implemented based on the full-hole section blasting penetration enhancement device described in any of the above embodiments, and the full-hole section blasting penetration enhancement method includes: The blasting device is inserted into the borehole, with a gap of 8m to 16m between it and the borehole opening. A sealing material is placed within the interval space to seal the pores; Liquid carbon dioxide is filled into the rupture tube; The detonator is activated by a wire.

[0016] The full-section blasting permeability enhancement method of this invention, through the full-section blasting permeability enhancement device of this invention, can fracture the entire length of the borehole equipped with the blaster. In other words, it can fracture all parts of the borehole except for the sealing section, thereby performing full-section blasting permeability enhancement. At the same time, due to the simple structure, light weight, and lack of need for recycling of the blaster, the full-section blasting permeability enhancement method is easy to implement. Attached Figure Description

[0017] Figure 1 This is a schematic diagram illustrating the use of the full-hole section blasting penetration enhancement device according to an embodiment of the present invention; Figure 2This is a schematic diagram of the blaster of the full-hole blasting penetration enhancement device according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the detonator of the full-hole section blasting penetration enhancement device according to an embodiment of the present invention.

[0018] Figure label: 1. Detonator; 11. Detonating tube; 111. Filling port; 112. Terminal block; 12. Detonating element; 121. Shell; 122. Electric igniter; 13. Wire; 2. Liquid storage container; 3. Liquid supply pipe; 4. Detonator; 5. Connecting wire; 6. Sealing section; 7. Coal seam; 8. Roadway. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0020] The following is for reference. Figures 1-3 A full-hole section blasting penetration enhancement device and method according to embodiments of the present invention are described.

[0021] like Figures 1-3 As shown, the full-hole section blasting permeability enhancement device of the present invention includes a blaster 1, which can be selected to be used in a borehole provided on the coal seam 7 to perform fracturing on the coal seam 7 through blasting to enhance permeability.

[0022] The blasting device 1 includes a blasting tube 11, an initiator 12, and a wire 13.

[0023] The rupture tube 11 is used to contain liquid carbon dioxide. An initiator 12 is disposed inside the rupture tube 11 to cause the liquid carbon dioxide to expand and rupture the rupture tube 11. A wire 13 is connected to the initiator 12 to activate it.

[0024] The full-section blasting permeability enhancement device of this invention uses the detonator 12 to cause liquid carbon dioxide to expand and rupture the blasting tube 11, thereby fracturing the entire length of the borehole with the blasting tube 11. This enables full-section blasting permeability enhancement of the borehole. At the same time, the blaster 1 has a simple structure and is lightweight, making it easy to assemble and insert into the borehole. Furthermore, since the blasting tube 11 is ruptured by carbon dioxide, it does not need to be recycled, allowing the blaster 1 to be used as a disposable consumable without recycling, simplifying the construction process and making it easy to use.

[0025] In some embodiments, such as Figure 2 As shown, the rupture tube 11 is a polyethylene tube or a thin-walled steel tube, designed to rupture after the liquid carbon dioxide initiator 12 expands, without requiring recovery. The ratio of the outer diameter to the wall thickness of the thin-walled steel tube is greater than 20.

[0026] The rupture tube 11 is preferably a polyethylene tube, which is easy to process and has a lower cost. It is also easier to rupture and breaks evenly, which is beneficial for carbon dioxide fracturing to produce uniform cracks.

[0027] The wall thickness of the polyethylene pipe used as the bursting tube 11 is 3mm to 5mm, such as 3mm, 4mm, 5mm, etc., so that the maximum pressure that the bursting tube 11 can withstand is 2MPa to 3MPa, such as 2MPa, 2.5MPa, 3MPa, etc., so that the bursting tube 11 can contain as much liquid carbon dioxide as possible and is easily burst by the expansion of carbon dioxide.

[0028] In some embodiments, such as Figure 2 As shown, the rupture tube 11 is a closed tube. One end of the rupture tube 11 is provided with a filling port 111, which is used to connect to a pipeline to fill the rupture tube 11 with liquid carbon dioxide. This allows the rupture tube 11 to be inserted into the borehole first, and then filled with liquid carbon dioxide, so that the rupture tube 11 can be easily inserted into the borehole.

[0029] In some embodiments, the wire 13 may be configured to extend outside the blasting tube 11 so as to be directly connected to the detonator 4, thereby transmitting the signal of the detonator 4 to the detonator 12.

[0030] Alternatively, a terminal 112 can be installed at one end of the blasting tube 11, and a wire 13 can be connected between the terminal 112 and the detonator 12. The wire 13 can be connected between the terminal 112 and the detonator 4 via a connecting wire 5, so that the signal from the detonator 4 passes through the connecting wire 5, the terminal 112 and the wire 13 in sequence, and then is transmitted to the detonator 12.

[0031] Optionally, the wire 13 can be connected between the terminal block 112 and the detonator 12, and the terminal block 112 and the detonator 4 can be connected via the connecting wire 5, such as... Figure 1 and Figure 2 As shown.

[0032] In some embodiments, the detonator 12 is used to generate heat to vaporize liquid carbon dioxide, thereby expanding and rupturing the rupture tube 11.

[0033] In some embodiments, such as Figure 2 and Figure 3 As shown, the detonator 12 includes a housing 121 and an electric igniter 122. The housing 121 contains a heating agent, and the electric igniter 122 is located inside the housing 121 and surrounded by the heating agent. The electric igniter 122 is connected to a wire 13 and is used to ignite the heating agent to generate heat after receiving a signal transmitted by the wire 13, thereby vaporizing the liquid carbon dioxide in the detonation tube 11.

[0034] It is understood that in other embodiments, the detonator 12 may also be a heater such as a heating rod or heating wire.

[0035] In some embodiments, the shell 121 is made of a PE composite substrate film, which is convenient to produce and has a low cost. On the other hand, it is easy to break when the exothermic agent burns, so that the heat generated by the exothermic agent can be quickly transferred in the liquid carbon dioxide for rapid and uniform vaporization. Furthermore, the shell 121 and even the detonator 12 do not need to be recycled. With the rupture tube 11, the detonator 1 can be used as a disposable consumable without recycling.

[0036] Optionally, the shell 121 is cylindrical, with a length of 400mm to 600mm, in order to produce a better gasification effect.

[0037] In some embodiments, the blasting tube 11 may be configured as at least two tube segments connected sequentially along the axial direction. The number of tube segments may be adjusted according to the depth of the borehole into which the blasting tube 11 is to be inserted, so that the length of the blasting tube 11 may be adjusted according to the depth of the borehole.

[0038] In some embodiments, when the length of the rupture tube 11 is long, at least two detonators 12 can be arranged at intervals along the axial direction of the rupture tube 11. The electric ignition heads 122 of two adjacent detonators 12 are connected by wires to connect the detonators 12 in series. The electric ignition head 122 of the outermost detonator 12 is connected to a wire 13. The signal transmitted by the wire 13 can reach and ignite each electric ignition head 122 in sequence so that the liquid carbon dioxide in the rupture tube 11 is vaporized as simultaneously as possible.

[0039] In some embodiments, such as Figure 1 As shown, the full-hole section blasting penetration enhancement device also includes a liquid storage container 2, a liquid supply pipe 3, and a detonator 4.

[0040] Storage container 2 is used to store liquid carbon dioxide and can be optionally installed inside the tunnel. The liquid supply pipe 3 is used to connect between the liquid storage container 2 and the rupture pipe 11. It can be optionally connected to the filling port 111 of the rupture pipe 11 to supply liquid carbon dioxide in the liquid storage container 2 into the rupture pipe 11.

[0041] The detonator 4 is used to electrically connect to the wire 13 and activate the detonator 12. The detonator 4 can be directly connected to the wire 13 extending outside the blasting tube 11, or it can be indirectly connected to the wire 13 via the connecting wire 5 and the terminal block 112. The detonator 4 is controlled by operators in the roadway, and emits an electrical signal by means such as pressing a button, thereby activating the detonator 12. The detonator 4 can be selected as a capacitive detonator for coal mines, which has explosion-proof function and is suitable for roadway environments containing explosive hazards such as methane or coal dust.

[0042] It should be noted that the full-hole blasting penetration enhancement device of the present invention is applicable to, but not limited to, blasting penetration enhancement of deep holes.

[0043] The following is for reference. Figures 1-3 This invention describes a full-hole section blasting penetration enhancement method based on an embodiment of the invention.

[0044] The full-hole section blasting penetration enhancement method of this invention includes: The blasting device 1 is inserted into the borehole, with a gap of 8m to 16m between it and the borehole opening. The blasting device 1 may be positioned to abut against the bottom of the borehole, which may be located on the coal seam 7.

[0045] Sealing material is placed within the gap to seal the opening. In other words, the gap is made into a sealed section 6.

[0046] Liquid carbon dioxide is filled into the rupture tube 11.

[0047] The detonator 12 is activated by the wire 13.

[0048] The full-section blasting permeability enhancement method of this invention, through the full-section blasting permeability enhancement device of this invention, can fracture the entire length of the borehole equipped with the blaster 1. In other words, it can fracture all parts of the borehole except for the sealing section, thereby performing full-section blasting permeability enhancement on the borehole. At the same time, due to the simple structure, light weight, and lack of need for recycling of the blaster 1, the full-section blasting permeability enhancement method is easy to implement.

[0049] In some embodiments, before inserting the blaster 1 into the borehole, the number of blasting tube segments 11 is adjusted according to the depth of the borehole, or the number of blasting tubes 11 that need to be connected in series is adjusted according to the depth of the borehole, so that after the blaster 1 is inserted into the borehole, there is an interval space of 8m to 16m between it and the borehole opening for sealing the hole.

[0050] When the blasting tubes 11 are configured as at least two connected in series, the initiator 12 in the blasting tube 11 closest to the borehole can be selected for activation. In other words, the electric ignition head 122 of the initiator 12 in the blasting tube 11 closest to the borehole is used for electrical connection with the detonator 4.

[0051] In some embodiments, before inserting the blaster 1 into the borehole, the connecting wire 5 is connected to the terminal block 112, and the liquid supply pipe 3 is connected to the filling port 111.

[0052] After the blaster 1 is inserted into the borehole, the connecting line 5 and the liquid supply pipe 3 are both extended to the outside of the borehole. Then, sealing material is placed in the gap space to seal the borehole. The connecting line 5 and the liquid supply pipe 3 are both inserted into the sealing section 6 formed by sealing the borehole.

[0053] Then connect the liquid supply pipe 3 to the liquid storage container 2, and fill the burst pipe 11 with liquid carbon dioxide.

[0054] After the liquid carbon dioxide filling is completed, connect the connecting line 5 to the detonator 4.

[0055] This allows for the easy and quick insertion of the unfilled detonator 1 into the borehole before filling it with liquid carbon dioxide. The liquid supply pipe 3 is only connected to the storage container 2 during the filling of liquid carbon dioxide to avoid accidental activation that could lead to premature filling of liquid carbon dioxide, affecting the normal operation of the process or even creating safety hazards. The connecting line 5 is only connected to the detonator 4 before it is triggered to avoid accidental activation of the detonator 4, which could cause an explosion and create safety hazards.

[0056] It should be noted that after the blaster 1 is inserted into the borehole, the terminal block 112 and the filling port 111 are located at the end of the blasting tube 11 facing the borehole opening, so that the connecting wire 5 and the liquid supply tube 3 have shorter lengths to reduce costs, while avoiding wear of the connecting wire 5 and the liquid supply tube 3 inside the borehole.

[0057] In some embodiments, the liquid storage container 2 is equipped with a pressure gauge. During the filling of liquid carbon dioxide, the reading of the pressure gauge first decreases and then increases. When the reading of the pressure gauge returns to its original value, the filling of liquid carbon dioxide is stopped.

[0058] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0059] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0060] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0061] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0062] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0063] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A full-hole section blasting penetration enhancement device, characterized in that, The device includes a blasting device (1), which includes a blasting tube (11), an initiator (12), and a wire (13). The blasting tube (11) is used to contain liquid carbon dioxide. The initiator (12) is disposed inside the blasting tube (11) and is used to cause the liquid carbon dioxide to expand and rupture the blasting tube (11). The wire (13) is connected to the initiator (12) and is used to activate the initiator (12).

2. The full-hole section blasting penetration enhancement device according to claim 1, characterized in that, The rupture tube (11) is a polyethylene tube or a thin-walled steel tube.

3. The full-hole section blasting penetration enhancement device according to claim 1, characterized in that, The rupture tube (11) is a polyethylene tube, the wall thickness of the rupture tube (11) is 3mm to 5mm, and / or the maximum pressure of the rupture tube (11) is 2MPa to 3MPa.

4. The full-hole section blasting penetration enhancement device according to claim 1, characterized in that, The rupture tube (11) is provided with a filling port (111), which is used to fill the rupture tube (11) with liquid carbon dioxide.

5. The full-hole section blasting penetration enhancement device according to claim 1, characterized in that, The wire (13) extends to the outside of the blasting tube (11), or the blasting tube (11) is provided with a terminal (112), and the wire (13) is connected between the terminal (112) and the detonator (12).

6. The full-hole section blasting penetration enhancement device according to claim 1, characterized in that, The detonator (12) is used to generate heat to vaporize liquid carbon dioxide, thereby expanding and rupturing the rupture tube (11).

7. The full-hole section blasting penetration enhancement device according to claim 6, characterized in that, The detonator (12) includes a housing (121) and an electric igniter (122). The housing (121) contains a heating agent, and the electric igniter (122) is located inside the housing (121) and surrounded by the heating agent. The electric igniter (122) is connected to the wire (13) and is used to ignite the heating agent to generate heat.

8. The full-hole section blasting penetration enhancement device according to claim 7, characterized in that, The housing (121) is made of PE composite substrate film.

9. The full-hole section blasting penetration enhancement device according to any one of claims 1-8, characterized in that, It also includes a liquid storage container (2), a liquid supply pipe (3), and a detonator (4). The liquid storage container (2) is used to store liquid carbon dioxide. The liquid supply pipe (3) is used to connect the liquid storage container (2) and the detonation pipe (11) to supply the liquid carbon dioxide in the liquid storage container (2) into the detonation pipe (11). The detonator (4) is used to be electrically connected to the wire (13) and can activate the detonator (12).

10. A method for enhancing penetration through blasting in a full borehole section, characterized in that, The full-hole section blasting penetration enhancement device according to any one of claims 1-9 is implemented, and the full-hole section blasting penetration enhancement method includes: The blasting device (1) is inserted into the borehole, with an interval space of 8m to 16m between it and the borehole opening; A sealing material is placed within the interval space to seal the pores; Liquid carbon dioxide is filled into the rupture tube (11); The detonator (12) is activated by the wire (13).

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