Biomass mixed fuel explosion device and method

Abstract

The application discloses a biomass mixed fuel blasting device and method, which comprises a blasting pipe body, a sealing cover and a gas-permeable bearing structure. The blasting pipe body has an open end, the sealing cover is detachably and sealingly connected to the open end, and the gas-permeable bearing structure is arranged in the blasting pipe body and defines a containing space for containing oxygen between the gas-permeable bearing structure and the inner wall of the blasting pipe body. The biomass mixed fuel is carried in the gas-permeable bearing structure. An air inlet valve for filling oxygen into the containing space is arranged on the sealing cover and / or the blasting pipe body. A ignition element is arranged in the blasting pipe body and used for igniting the biomass mixed fuel. The application effectively increases the contact area and diffusion path of oxygen and fuel, ensures that the deflagration reaction is quickly and fully carried out, significantly reduces the fuel residue rate in the pipe body, and greatly improves the energy release rate and effective work efficiency of unit fuel.

Description

Technical Field

[0001] This invention relates to the field of rock breaking technology, and more specifically, to a biomass mixed fuel blasting device and method. Background Technology

[0002] Traditional explosive blasting has drawbacks such as safety hazards, complex approval processes, generation of harmful gases and shock waves, and environmental damage. Existing non-explosive blasting methods, such as carbon dioxide fracturing, have low energy, while mechanical rock breaking is costly and inefficient. In recent years, the technology of using biomass fuel and high-pressure oxygen in a closed container for deflagration has attracted attention. However, in existing technologies, the fuel is usually packed in a dense bulk, which leads to difficulties in oxygen diffusion, incomplete combustion, and often results in fragments in the blasting tube, resulting in low energy utilization. In addition, the initiation reliability is insufficient, and a single ignition element is prone to misfires.

[0003] Therefore, there is a need for a blasting device and method that can ensure sufficient mixing of fuel and oxygen, rapid and complete combustion, and reliable ignition. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in the related art. Therefore, one object of this invention is to provide a biomass mixed fuel blasting device.

[0005] Another object of the present invention is to provide a blasting method.

[0006] To achieve the above objectives, in one respect, a biomass mixed fuel blasting device according to an embodiment of the present invention includes a blasting tube, a sealing cap, and a breathable bearing structure.

[0007] The blasting tube has an open end.

[0008] The sealing cap is detachably and sealingly connected to the opening end.

[0009] The permeable bearing structure is disposed inside the rupture tube and defines a space for containing oxygen between itself and the inner wall of the rupture tube. The permeable bearing structure carries biomass mixed fuel inside.

[0010] The sealing cap and / or the rupture tube are provided with an air inlet valve for filling the accommodating space with oxygen, and the rupture tube is provided with an ignition element for igniting the biomass mixed fuel.

[0011] According to an embodiment of the present invention, a biomass mixed fuel blasting device is provided. By setting a permeable bearing structure inside the blasting tube, the biomass mixed fuel is carried inside the permeable structure, and an independent accommodating space is defined between the structure and the inner wall of the tube. After high-pressure oxygen is filled into the accommodating space through the air inlet valve, it can uniformly permeate into the interior of the fuel particles and the interparticle spaces through the pores of the permeable bearing structure, thereby achieving large-area and uniform mixing of oxygen and biomass fuel. Compared with the prior art, where the dense bulk fuel leads to difficulties in oxygen diffusion, the present invention effectively increases the contact area and diffusion path between oxygen and fuel, ensuring that the deflagration reaction proceeds rapidly and fully, significantly reducing the residual fuel content inside the tube, and greatly improving the energy release rate and effective work efficiency per unit fuel.

[0012] In addition, the biomass mixed fuel blasting device according to the above embodiments of the present invention may also have the following additional technical features: According to one embodiment of the present invention, the breathable load-bearing structure is a breathable bag or a porous support frame.

[0013] According to one embodiment of the present invention, the breathable bag body is made of cotton cloth, the porous support frame is made of PVC pipe, and a plurality of breathable holes are spaced apart on the PVC pipe.

[0014] According to one embodiment of the present invention, there are at least two ignition elements, which are spaced apart within the rupture tube.

[0015] According to one embodiment of the present invention, the ignition element is an electric ignition head or a digital electronic detonator.

[0016] According to one embodiment of the present invention, a lead wire is provided on the sealing cover, one end of the lead wire extends into the body of the blast tube and is connected to the ignition element, and the other end extends into the outside of the blast tube and is connected to the detonation control element.

[0017] According to one embodiment of the present invention, the bottom of the blasting tube is a thickened structure, the wall thickness of the blasting tube is 2-3 mm, and the material is carbon steel or stainless steel.

[0018] On the other hand, a blasting method according to an embodiment of the present invention includes the biomass mixed fuel blasting device as described above, comprising the following steps: S1. Preparation of a permeable support structure for biomass fuel: Fill the permeable support structure with a mixture of biomass fuel; S2. Loading: Install the ignition element into the rupture tube, and insert the permeable bearing structure filled with biomass mixed fuel into the rupture tube, ensuring contact with the ignition element; S3. Sealing and oxygen filling: Cover with the sealing cap and fill the pipe with oxygen to the preset pressure through the air inlet valve; S4. Installation and detonation: Place the oxygenated biomass mixed fuel blasting device into the borehole and plug it, then detonate it remotely via an ignition element.

[0019] According to one embodiment of the present invention, the preset pressure is 8 to 15 MPa.

[0020] According to one embodiment of the present invention, the oxygen introduced in step S3 is industrial oxygen; or The medium filled in step S3 is liquid oxygen. When liquid oxygen is used, after filling outside the hole, it is quickly sealed and placed into the borehole. The liquid oxygen is used to generate self-generated high pressure, and there is no need to perform the preset pressure control steps.

[0021] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of the blasting device in an embodiment of the present invention; Figure 2 This is a cross-sectional view of the overall structure of the blasting device in an embodiment of the present invention; Figure 3 This is an exploded view of the overall structure of the blasting device in an embodiment of the present invention; Figure 4 This is a schematic diagram illustrating the implementation steps of the blasting method in an embodiment of the present invention.

[0024] Icon labels: Blasting pipe body 10; Open end 11; Sealing cap 12; Storage space 13; Intake valve 14; Ignition element 15; Breathable load-bearing structure 20; Ventilation hole 21; Footing 22.

[0025] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] 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," "circumferential," and "radial," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0028] 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 one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] 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 connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] The following describes in detail, with reference to the accompanying drawings, an embodiment of the present invention: a biomass mixed fuel blasting device and method.

[0032] Reference Figures 1 to 3 As shown in the figure, a biomass mixed fuel blasting device according to an embodiment of the present invention includes a blasting tube 10, a sealing cap 12, and a breathable bearing structure 20.

[0033] The blasting tube 10 has an open end 11.

[0034] The sealing cap 12 is detachably and sealingly connected to the opening end 11.

[0035] The permeable bearing structure 20 is disposed inside the rupture tube 10 and defines a accommodating space 13 for containing oxygen between itself and the inner wall of the rupture tube 10. The permeable bearing structure 20 carries biomass mixed fuel inside.

[0036] The sealing cap 12 and / or the rupture tube 10 are provided with an air inlet valve 14 for filling the accommodating space 13 with oxygen, and the rupture tube 10 is provided with an ignition element 15 for igniting the biomass mixed fuel.

[0037] According to an embodiment of the present invention, a biomass mixed fuel blasting device is provided. By setting a permeable bearing structure 20 inside the blasting tube 10, the biomass mixed fuel is carried inside the permeable structure, and an independent accommodating space 13 is defined between the structure and the inner wall of the tube. After high-pressure oxygen is filled into the accommodating space 13 through the air inlet valve 14, it can uniformly permeate into the interior of the fuel particles and the interparticle spaces through the pores of the permeable bearing structure 20, thereby achieving large-area and uniform mixing of oxygen and biomass fuel. Compared with the prior art where dense bulk fuel leads to difficulties in oxygen diffusion, the present invention effectively increases the contact area and diffusion path between oxygen and fuel, ensures rapid and complete combustion reaction, significantly reduces the residual rate of fuel segments inside the tube, and greatly improves the energy release rate and effective work efficiency per unit fuel.

[0038] Preferably, in one embodiment of the present invention, the breathable load-bearing structure 20 is a breathable bag or a porous support frame.

[0039] Thus, the permeable bag body is made of flexible, breathable material, making it lightweight and soft, and easy and quick to fill, especially suitable for rapid on-site explosive loading operations. The bag body is inexpensive, requires no recycling, and is disposable with no burden. The porous support frame is made of tubular material, with evenly distributed and structurally stable permeable holes 21 on the tube wall, maintaining a fixed internal cavity shape and providing a regular bearing space for the fuel. This ensures the consistency and repeatability of the oxygen diffusion path in batch operations, making it particularly suitable for batch and standardized blasting operations. These two forms provide diverse implementation options for the device, allowing users to flexibly choose according to project scale, operating environment, and operating habits, thus broadening the device's applicability. Regardless of whether a permeable bag body or a porous support frame is used, both have a permeable function, and their core role is to provide a uniform diffusion channel for high-pressure oxygen. After high-pressure oxygen enters the containment space 13, it permeates evenly from the outside to the inside of the fuel and the gaps between fuel particles through the fiber gaps of the bag fabric or the permeable holes 21 in the frame tube wall, forming a three-dimensional, all-round diffusion network of oxygen within the fuel pile. This structure effectively overcomes the shortcomings of existing technologies where fuel is densely packed into the tube and high-pressure oxygen can only contact the surface of the fuel and cannot penetrate into the interior. It ensures that the fuel particles can obtain sufficient oxygen both inside and outside, fundamentally solving the problems of insufficient oxygen supply and uneven mixing. It ensures that the deflagration reaction proceeds rapidly, synchronously and completely throughout the entire fuel, maximizing the release of the fuel's chemical energy.

[0040] Preferably, in one embodiment of the present invention, the breathable bag body is made of cotton cloth, the porous support frame is made of PVC pipe, and a plurality of breathable holes 21 are spaced apart on the PVC pipe.

[0041] Thus, cotton fabric, a common textile, is inexpensive, readily available, and possesses good flexibility and breathability. Using it to create a breathable bag body satisfies the dual functional requirements of carrying fuel and allowing ventilation and oxygen permeability, while significantly reducing material costs. PVC pipe, a commonly used engineering plastic pipe, is highly standardized, available in a full range of specifications, and economically priced. The processing technology for creating ventilation holes 21 in its pipe wall is simple and mature, requiring no specialized equipment. Both are readily available general-purpose materials in industrial and civilian fields, resulting in extremely low manufacturing costs for the breathable load-bearing structure 20 of this invention, making it suitable for large-scale promotion and application.

[0042] Preferably, in one embodiment of the present invention, there are at least two ignition elements 15, which are spaced apart within the rupture tube body 10.

[0043] Understandably, existing technologies typically use only a single ignition element 15. If this ignition element 15 fails due to moisture, poor wiring contact, damage from transport vibration, or inherent quality defects, the entire blasting device will fail to detonate, resulting in a misfire. This application achieves redundancy in the ignition system by using at least two ignition elements 15. During detonation, multiple ignition elements 15 are activated simultaneously. As long as any one of these ignition elements 15 is functioning normally, the biomass fuel mixture can be successfully ignited. Even if individual ignition elements 15 fail, the remaining ignition elements 15 can still independently complete the detonation task, fundamentally eliminating the risk of misfires due to a single element failure and significantly improving the success rate of blasting operations.

[0044] Simultaneously, multiple ignition elements 15 are distributed at intervals along the axial or circumferential direction of the blast tube 10, enabling the ignition energy to be released synchronously in different areas of the fuel pile. Compared to single ignition, where the flame front needs to gradually spread outward from a single point and fuel far from the ignition source may fail to ignite due to heat loss, the multi-point interval arrangement achieves synchronous ignition throughout the entire fuel range, shortens the flame propagation path, ensures that the biomass mixed fuel is ignited quickly and uniformly, and is conducive to the complete deflagration reaction.

[0045] Preferably, in one embodiment of the present invention, the ignition element 15 is an electric ignition head or a digital electronic detonator.

[0046] Thus, the electric ignition head is a conventional electric initiation device, simple in structure, low in cost, and widely used. It can ignite with low voltage and current, making it suitable for general engineering blasting scenarios. The digital electronic detonator, on the other hand, has a built-in microelectronic control chip, possessing advanced functions such as high-precision delay, online detection, and anti-static and anti-stray current capabilities. It is suitable for operating conditions with special requirements for detonation timing control or complex electromagnetic environments. Both ignition elements have a mature engineering application foundation, allowing users to flexibly select the appropriate element based on project scale, budget, and safety requirements.

[0047] Preferably, in one embodiment of the present invention, a lead wire 22 is provided on the sealing cover 12, one end of the lead wire 22 extends into the blast tube body 10 and is connected to the ignition element 15, and the other end extends into the outside of the blast tube body 10 and is connected to the detonation control element.

[0048] Thus, the lead wire 22 serves as the electrical connection cable, used to transmit the detonation current emitted by the detonation control element (such as the detonator) from outside the tube to the ignition element 15 inside the tube, achieving remote detonation control. Advantageously, the point where the lead wire 22 passes through the sealing cap 12 is equipped with a sealing structure (such as sealant, sealing terminals, or wire sealing plugs) to ensure the airtightness of the tube while introducing the electrical signal channel, preventing leakage of the high-pressure oxygen along the gaps in the lead wire 22. When there are multiple ignition elements 15, they are preferably connected in parallel via the lead wire 22 to ensure that each ignition element 15 receives the detonation current synchronously and is ignited simultaneously, ensuring uniform and reliable ignition of the fuel. This embodiment integrates the electrical signal introduction and sealing functions into one compact structure with reliable sealing. Furthermore, the sealing cap 12, along with the lead wire 22 and the ignition element 15, can be pre-assembled as a whole, facilitating on-site assembly and disassembly, significantly improving the efficiency and safety of blasting operations.

[0049] Preferably, in one embodiment of the present invention, the bottom of the blasting tube 10 is a thickened structure, the wall thickness of the blasting tube 10 is 2-3 mm, and the material is carbon steel or stainless steel.

[0050] Thus, because the blasting tube 10 has a cylindrical structure, its bottom wall thickness is greater than that of the side walls, forming local reinforcement to resist the high-pressure impact on the bottom during the deflagration, preventing high-pressure gas from unexpectedly escaping from the bottom (i.e., the "bottom-out" phenomenon). This ensures that the tube body preferentially ruptures from the side walls when the design rupture pressure is reached, concentrating the deflagration energy onto the lateral rock mass and improving the effective work efficiency. The side wall thickness is 2-3 mm, a range that allows for controlled rupture near the peak deflagration pressure, ensuring sufficient pressure holding time for the deflagration reaction within the confined space while also ensuring sufficient impact energy is released at the moment of rupture. The blasting tube 10 is made of carbon steel or stainless steel. Carbon steel has the advantages of high strength and low cost, making it suitable for general engineering blasting scenarios; stainless steel, in addition to sufficient strength, also has excellent corrosion resistance, making it suitable for water-bearing boreholes or corrosive environments. Those skilled in the art can flexibly select the tube material according to specific working conditions and budget to meet the usage requirements under different operating conditions.

[0051] On the other hand, refer to Figure 4 As shown, a blasting method according to an embodiment of the present invention includes the biomass mixed fuel blasting device as described above, comprising the following steps: S1. Preparation of biomass fuel permeable support structure 20: Fill the permeable support structure 20 with biomass mixed fuel; specifically, weigh the biomass mixed fuel (such as a mixture of sawdust, straw powder, biomass charcoal powder, etc. and combustion aid) according to the engineering needs, mix it thoroughly and evenly, fill the mixed fuel into the permeable bag body or porous support frame, and seal it for later use.

[0052] S2. Loading: Install the ignition element 15 inside the blast tube body 10, and then install the permeable bearing structure 20 filled with biomass mixed fuel inside the blast tube body 10, ensuring contact with the ignition element 15. Specifically, first fix the ignition element 15 (electric ignition head or digital electronic detonator) in a predetermined position inside the blast tube body 10, then place the permeable bearing structure 20 filled with fuel into the tube body, adjusting its position so that the ignition element 15 is inserted into or closely attached to the inside of the fuel bearing structure, ensuring that the ignition element 15 is surrounded by fuel or in close contact with the fuel surface, so as to ensure that the ignition energy can be effectively transferred to the fuel. Of course, the ignition element 15 and the permeable bearing structure 20 can also be pre-installed, and then the permeable bearing structure 20 with the ignition element 15 can be installed into the blasting vessel.

[0053] S3. Sealing and Oxygen Filling: Cover with the sealing cap 12 and fill the pipe with oxygen to the preset pressure through the air inlet valve 14; specifically, after checking that the sealing ring is intact, tighten the sealing cap 12 to the open end 11 of the burst pipe body 10, connect the high-pressure oxygen source through the air inlet valve 14, and fill the internal space 13 of the pipe body with high-pressure oxygen (such as industrial oxygen, purity ≥99.5%) until the pressure inside the pipe reaches the preset pressure value (preferably 8~15MPa), close the air inlet valve 14, and keep the pipe body sealed.

[0054] S4. Installation and Detonation: The oxygenated biomass mixed fuel blasting device is placed into the blast hole and sealed. Detonation is then performed remotely via ignition element 15. Specifically, the oxygenated blasting device is placed into a pre-drilled blast hole, which is then sealed tightly with a plugging material (such as gravel or mud). After the personnel have evacuated to a safe area, a detonation command is remotely issued via the detonation control element. Ignition element 15 ignites the biomass mixed fuel. The fuel undergoes a rapid deflagration reaction in the high-pressure oxygen environment, releasing a large amount of high-temperature, high-pressure gas. This causes the blasting tube 10 to expand and fracture, impacting the surrounding rock mass and achieving the blasting purpose.

[0055] Based on the above, this method first installs the ignition element 15 inside the blast tube 10, and then inserts the ventilated support structure 20 filled with fuel, explicitly requiring that the ignition element 15 be in contact with the fuel support structure. This sequential design ensures that the ignition element 15 is surrounded by fuel or closely attached to the fuel surface, avoiding the problem of ignition energy not being effectively transferred to the fuel due to separation of the ignition element 15 from the fuel. Compared to schemes that arbitrarily place the ignition element 15 inside the tube without guaranteeing its relative position to the fuel, this method ensures reliable contact between the ignition element 15 and the fuel through a standardized loading sequence, providing physical assurance for subsequent detonation.

[0056] Preferably, in one embodiment of the present invention, the preset pressure is 8 to 15 MPa.

[0057] Thus, industrial oxygen (purity ≥99.5%) is introduced into the blasting pipe body 10 via the intake valve 14, connected to a high-pressure oxygen source, until the pressure inside the pipe reaches the range of 8–15 MPa. An oxygen pressure of no less than 8 MPa ensures that the biomass mixture undergoes a rapid and complete deflagration reaction in the confined space, releasing sufficient chemical energy to effectively break up the rock mass. Simultaneously, the upper limit design of no more than 15 MPa keeps the pressure inside the pipe within the safe pressure-bearing range of the blasting pipe body 10 (wall thickness 2–3 mm, carbon steel or stainless steel material), preventing premature leakage or rupture of the pipe body during the oxygen filling stage or before deflagration. It also matches well with the rated output pressure of conventional industrial oxygen cylinders (approximately 15 MPa), allowing for direct oxygen filling without additional pressurization equipment, reducing on-site equipment requirements and operational difficulty. Those skilled in the art can adaptively adjust the preset pressure value within the above range according to factors such as rock hardness, borehole depth, and ambient temperature. For example, for rock masses with low hardness or shallow hole blasting, 8-10 MPa can be selected; for hard rock masses or deep hole blasting, 12-15 MPa can be selected to obtain the best crushing effect.

[0058] Preferably, in one embodiment of the present invention, the oxygen introduced in step S3 is industrial oxygen; or The medium filled in step S3 is liquid oxygen. When liquid oxygen is used, after filling outside the hole, it is quickly sealed and placed into the borehole. The liquid oxygen is used to generate self-generated high pressure, and there is no need to perform the preset pressure control steps.

[0059] Thus, industrial oxygen is a widely used bulk gas in the industrial field, with a purity typically not lower than 99.5%. It can be directly filled using standard oxygen cylinders and pressure reducing valves, and is readily available and inexpensive. During filling, industrial oxygen is introduced into the rupture tube 10 through the inlet valve 14. The filling pressure is precisely adjusted to the preset pressure (preferably 8-15 MPa) using the pressure reducing valve and pressure gauge. The operation is simple, the pressure is controllable, and the batch consistency is good, making it suitable for conventional engineering blasting scenarios.

[0060] As an alternative to the above scheme, the medium introduced in step S3 is liquid oxygen. Liquid oxygen expands approximately 800 times in volume when vaporized at room temperature and pressure. After complete vaporization within the sealed blasting tube 10, it can spontaneously generate a high-pressure oxygen environment. When using liquid oxygen, after filling the hole with liquid oxygen outside the borehole, the sealing cap 12 is quickly closed and tightened. The device is then immediately placed into the borehole. The ambient temperature allows the liquid oxygen to vaporize within the sealed tube, generating a self-generated high pressure. There is no need to perform preset pressure control steps, nor is it necessary to connect to an external high-pressure gas source or booster equipment. This scheme is particularly suitable for remote work sites lacking high-pressure oxygen filling equipment or where it is inconvenient to carry large gas cylinders. It also significantly shortens on-site oxygen filling time and simplifies the operation process. The above-mentioned industrial oxygen filling and liquid oxygen vaporization self-generated high-pressure oxygen source schemes provide users with the convenience of flexible selection according to different engineering conditions, and have a wide range of applications.

[0061] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present 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.

[0062] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A biomass mixed fuel blasting device, characterized in that, include: A blasting tube, wherein the blasting tube has an open end; A sealing cap, which is detachably and sealingly connected to the opening end; A breathable bearing structure is provided inside the rupture tube and defines a space for accommodating oxygen between the breathable bearing structure and the inner wall of the rupture tube. The breathable bearing structure carries biomass mixed fuel inside. The sealing cap and / or the rupture tube are provided with an air inlet valve for filling the accommodating space with oxygen, and the rupture tube is provided with an ignition element for igniting the biomass mixed fuel.

2. The biomass mixed fuel blasting device according to claim 1, characterized in that, The breathable load-bearing structure is a breathable bag or a porous support frame.

3. The biomass mixed fuel blasting device according to claim 2, characterized in that, The breathable bag body is made of cotton cloth, and the porous support frame is made of PVC pipe with multiple breathable holes spaced apart on the PVC pipe.

4. The biomass mixed fuel blasting device according to claim 1, characterized in that, There are at least two ignition elements, which are spaced apart within the rupture tube.

5. The biomass mixed fuel blasting device according to claim 1, characterized in that, The ignition element is an electric igniter or a digital electronic detonator.

6. The biomass mixed fuel blasting device according to claim 1, characterized in that, A lead wire is threaded through the sealing cap. One end of the lead wire extends into the body of the blast tube and is connected to the ignition element, while the other end extends to the outside of the blast tube and is connected to the detonation control element.

7. The biomass mixed fuel blasting device according to claim 1, characterized in that, The bottom of the blasting tube is thickened, and the wall thickness of the blasting tube is 2-3 mm. The material is carbon steel or stainless steel.

8. A blasting method, comprising the biomass mixed fuel blasting device as described in any one of claims 1 to 7, characterized in that, Includes the following steps: S1. Preparation of a permeable support structure for biomass fuel: Fill the permeable support structure with a mixture of biomass fuel; S2. Loading: Install the ignition element into the rupture tube, and insert the permeable bearing structure filled with biomass mixed fuel into the rupture tube, ensuring contact with the ignition element; S3. Sealing and oxygen filling: Cover with the sealing cap and fill the pipe with oxygen to the preset pressure through the air inlet valve; S4. Installation and detonation: Place the oxygenated biomass mixed fuel blasting device into the borehole and plug it, then detonate it remotely via an ignition element.

9. The blasting method according to claim 8, characterized in that, In step S3, the preset pressure is 8-15 MPa.

10. The blasting method according to claim 8, characterized in that, The oxygen introduced in step S3 is industrial oxygen; or The medium filled in step S3 is liquid oxygen. When liquid oxygen is used, after filling outside the hole, it is quickly sealed and placed into the borehole. The liquid oxygen is used to generate self-generated high pressure, and there is no need to perform the preset pressure control steps.

Images