Mine goaf blanking and filling device

Abstract

The invention relates to the technical field of goaf filling devices, in particular to a mine goaf discharging and filling device. Comprising a discharging section pipeline, a stirring mechanism and a spraying mechanism, the stirring mechanism comprises at least two stirrers arranged in the circumferential direction of the discharging section pipeline, and an inclined angle is formed between a stirring shaft of each stirrer and the axial direction of the discharging section pipeline; the spraying mechanism comprises at least two sprayers which are arranged along the circumferential direction of the blanking section pipeline, and a spraying head of each spraying mechanism is arranged at a feeding hole of the blanking section pipeline, so that the space in the pipeline is effectively utilized, the structure is compact, slurry can form a forced intersection area at an axis position, an additive is ensured to be in contact with a core of the slurry, and the slurry is prevented from being blocked. The additive is uniformly mixed into the slurry, and the required slurry is obtained at the discharging opening of the discharging section pipeline. Therefore, when the mine goaf is filled, the filling slurry and the filling additive are accurately mixed at the discharging opening, and the construction efficiency is improved while the quality of a filling body is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of goaf filling devices, and in particular relates to a device for filling materials in a goaf of a mine. Background Art

[0002] Mine goaf filling technology is a crucial tool for ensuring safe mining and reducing surface subsidence. During goaf filling operations, uniform mixing of slurry and filling admixtures is a key technical step in ensuring fill quality. Traditional filling processes often rely on pre-mixing on the ground, which can lead to segregation and stratification due to long-distance slurry transportation, severely impacting fill homogeneity.

[0003] Although the downhole mixing technology developed in recent years can reduce material separation, existing mixing devices generally have problems such as complex structure, large space occupation, and low mixing efficiency. Conventional mixing equipment is difficult to adapt to the narrow working environment underground, and there are difficulties in power supply and risks of pipeline blockage. In particular, when adding special functional liquids (such as foaming agents, enhancers, etc.), the existing spraying device has technical defects such as uneven liquid dispersion and insufficient contact with the slurry, resulting in low additive utilization. In addition, the installation and fixing method of downhole equipment is single, which makes it difficult to adapt to filling pipes of different specifications, affecting the adaptability of the project.

[0004] In response to the above problems, there is an urgent need to develop a filling admixture mixing device with a compact structure, efficient mixing and adaptability to complex underground working conditions, so as to achieve precise mixing of slurry and filling admixture at the discharge port, ensure the quality of the filling body and improve construction efficiency. Summary of the Invention

[0005] In view of the above shortcomings of the prior art, the purpose of the present invention is to provide a device for unloading and filling mine goafs. By arranging a stirring mechanism and a spraying mechanism in the unloading section pipeline, when filling the mine goaf, the slurry and the filling admixture can be accurately mixed at the unloading port, thereby ensuring the quality of the filling body while improving construction efficiency.

[0006] To achieve the above-mentioned and other related purposes, the present invention provides a device for filling a mine goaf, comprising:

[0007] Cutting section pipeline;

[0008] A stirring mechanism, the stirring mechanism comprising at least two stirrers arranged along the circumference of the discharge section pipeline, wherein the stirring shaft of each stirrer is inclined at an angle to the axial direction of the discharge section pipeline;

[0009] The spray mechanism comprises at least two sprayers arranged circumferentially along the pipeline of the unloading section, and the spray head of each spray mechanism is arranged at the feed inlet of the pipeline of the unloading section.

[0010] In one embodiment of the present invention, each of the stirrers is spiral-type, and one end of the stirring shaft of the stirrer is connected to the output shaft of the motor, and the other end extends to the central axis of the discharge section pipeline.

[0011] In one embodiment of the present invention, each of the motors is mounted on the outer wall of the pipe of the unloading section, and each of the stirring shafts passes through the side wall of the pipe of the unloading section via a sealed bearing.

[0012] In one embodiment of the present invention, each of the sprayers includes a spray pipe and a spray head, one end of the spray pipe is connected to the feed pipe, and the other end of the spray pipe extends toward the central axis of the discharge section pipeline.

[0013] In one embodiment of the present invention, each of the spray pipes passes through the side wall of the pipe in the unloading section and is sealed to the side wall of the pipe in the unloading section via a pipe sleeve.

[0014] In one embodiment of the present invention, a support frame is further included. The support frame is arranged in the pipeline of the unloading section, and the sealing bearing and the pipe sleeve are installed on the support frame.

[0015] In one embodiment of the present invention, the support frame includes at least two support rings and two support vertical rods, each of the support rings is coaxially arranged in the discharge section pipe, and the support vertical rods connect the support rings and are arranged axially parallel to the discharge section pipe.

[0016] In one embodiment of the present invention, the support frame further includes a pair of support cross bars arranged horizontally and crosswise, and the pair of support cross bars are respectively fixedly connected to the corresponding support vertical bars.

[0017] In one embodiment of the present invention, the extended end of each stirring shaft is a spherical end, and a matching spherical groove is provided on the supporting cross bar.

[0018] In one embodiment of the present invention, the stirring mechanism includes stirrers evenly arranged along the circumference of the discharge section pipeline, and every two stirrers are symmetrically arranged at the same axial position of the discharge section pipeline.

[0019] The beneficial technical effects of the present invention include at least:

[0020] The present invention proposes a device for filling and discharging materials in mining goafs. The stirring mechanism adopts a plurality of inclined stirrers arranged along the circumference of the discharging section pipeline. The stirring shaft is arranged at an angle to the axial direction of the discharging section pipeline, so that the present invention can achieve three-stage mixing, namely, static diversion of the discharging section pipeline, dynamic stirring of the stirring shaft, and turbulent homogenization formed by the plurality of inclined stirrers, so as to achieve uniform mixing of the slurry, and has the advantages of high mixing efficiency, strong adaptability, anti-clogging and energy saving. At the same time, the spraying mechanism of the present invention includes at least two sprayers arranged along the circumference of the discharging section pipeline. The spray head of each spraying mechanism is provided at the feed port of the discharging section pipeline, which can form a forced intersection area of ​​the slurry at the axial position, ensure the core contact of the additive and the slurry, so that the additive is evenly mixed into the slurry, and the required slurry is obtained at the discharging port of the discharging section pipeline. Therefore, the present invention realizes the precise mixing of the filled slurry and the filled additive at the discharging port, ensuring the quality of the filling body while improving the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 The present invention is a schematic structural diagram of a device for filling materials in a mine goaf according to an embodiment of the present invention.

[0023] Figure 2 The figure is a schematic structural diagram of a device for filling a mine goaf in another embodiment of the present invention.

[0024] Figure 3 Schematic diagram of the structure of a support frame in one embodiment of the present invention.

[0025] Notes on the figure numbers: 1-discharging section pipe; 2-agitator; 21-agitation shaft; 3-sprayer; 31-spray head; 32-spray pipe; 33-feed pipe; 4-motor; 5-support frame; 51-support ring; 52-support vertical rod; 53-support horizontal rod. DETAILED DESCRIPTION

[0026] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention.

[0027] It should be noted that the illustrations provided in this embodiment are only used to schematically illustrate the basic concept of the present invention. Therefore, the illustrations only show components related to the present invention and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0028] See also Figure 1-Figure 3 As shown, the present invention proposes a device for filling material in a mine goaf, comprising a feeding section pipeline 1, a stirring mechanism and a spraying mechanism. The stirring mechanism comprises at least two stirrers 2 arranged circumferentially along the feeding section pipeline 1, and the stirring shaft 21 of each stirrer 2 is inclined at an angle to the axial direction of the feeding section pipeline 1; the spraying mechanism comprises at least two sprayers 3 arranged circumferentially along the feeding section pipeline 1, and the spray head 31 of each spraying mechanism is arranged at the feed inlet of the feeding section pipeline 1.

[0029] It should be noted that when the goaf filling operation is carried out, the discharge section pipeline 1 can be set at one end of the filling pipeline for discharge, or it can be set as a section of the filling pipeline. The surface layer of the stirring shaft 21 of the stirrer 2 is provided with a corrosion-resistant / wear-resistant coating, the sprinkler 3 can be equipped with a swirl atomizing nozzle and a self-cleaning function, and the spray angle can be adjusted to an inclination angle (30°-60°). The stirring mechanism adopts a plurality of inclined stirrers 2 arranged circumferentially along the discharge section pipeline 1, and the stirring shaft 21 is arranged at an inclination angle to the axial direction of the discharge section pipeline 1, so that the present invention realizes three-stage mixing, namely, static diversion of the discharge section pipeline 1, dynamic stirring of the stirring shaft 21 and turbulent homogenization formed by multiple inclined stirrers 2, so as to realize uniform mixing of the slurry, and has the advantages of high mixing efficiency, strong adaptability, anti-blocking and energy saving. At the same time, the present invention is provided with a spray head 31 at the feed port of the discharge section pipe 1, and additives are added to the slurry so that the additives are evenly mixed into the slurry, and the required slurry is obtained at the discharge port of the discharge section pipe 1, thereby achieving precise mixing of the filled slurry and the filled additives at the discharge port, ensuring the quality of the filling body while improving construction efficiency.

[0030] In one embodiment of the present invention, each agitator 2 is a spiral agitator, and one end of the agitator shaft 21 of the agitator 2 is connected to the output shaft of the motor 4, and the other end extends toward the central axis of the lower feed pipe 1. Each motor 4 is mounted on the outer wall of the lower feed pipe 1, and each agitator shaft 21 extends through the side wall of the lower feed pipe 1 via a sealed bearing.

[0031] It is understood that each agitator 2 adopts a spiral structure, with one end of the agitator shaft 21 connected to the output shaft of the motor 4 and the other end extending to point to the central axis of the discharge section pipe 1. This design uses the axial thrust and radial shear force generated by the spiral blades to synergize, so that the slurry forms three-dimensional turbulence during the discharge process, and the mixing uniformity is improved compared to traditional stirring methods. At the same time, the spiral structure can effectively avoid material accumulation, and combined with the direct drive mode of the motor 4, the transmission efficiency is high and the energy consumption is reduced by about. In particular, the agitator shaft 21 pointing to the central axis of the discharge section pipe 1 can form a forced intersection area at the axial position of the slurry, ensuring that the core contact between the additive and the slurry is achieved, and the operating stability is significantly better than that of the eccentric stirring arrangement.

[0032] In one embodiment of the present invention, each sprayer 3 includes a spray pipe 32 and a spray head 31. One end of the spray pipe 32 is connected to the feed pipe 33, and the other end of the spray pipe 32 extends toward the central axis of the lower feed pipe 1. Each spray pipe 32 penetrates the side wall of the lower feed pipe 1 and is sealed to the side wall of the lower feed pipe 1 via a pipe sleeve.

[0033] It can be understood that the other end of the spray pipe 32 extends to the central axis of the lower material section pipeline 1, that is, the central injection layout, so that the additive atomized particles are radially and evenly dispersed, the contact area with the slurry is increased, and the coefficient of variation of the mixing uniformity is reduced.

[0034] In one embodiment of the present invention, a support frame 5 is further included. The support frame 5 is disposed within the feed section pipeline 1, and the sealed bearing and the pipe sleeve are mounted on the support frame 5. The support frame 5 includes at least two support rings 51 and two parallel support vertical rods 52. Each support ring 51 is coaxially disposed within the feed section pipeline 1. The support vertical rods 52 connect the support rings 51 and are arranged axially parallel to the feed section pipeline 1.

[0035] It can be understood that the support frame 5 structure not only provides a mounting structure for the sealing bearing and the pipe sleeve, but also provides support to the discharge section pipeline 1 in the axial and axial directions, thereby reducing pressure loss and maintaining a higher flow rate of the slurry.

[0036] In one embodiment of the present invention, the support frame 5 further includes a pair of horizontally intersecting support crossbars 53, each of which is fixedly connected to a corresponding support vertical bar 52. The extended end of each stirring shaft 21 is a spherical end, and the support crossbar 53 is provided with a matching spherical groove.

[0037] It can be understood that the support frame 5 forms a three-dimensional truss structure by adding horizontal cross-supporting cross bars 53, which together with the supporting vertical bars 52 constitute a high-rigidity support system, further ensuring the stability of the support frame 5 structure and the effectiveness of supporting the unloading section pipeline 1.

[0038] Specifically, a pair of horizontally cross-arranged support crossbars 53 can increase the overall bending stiffness of the support frame 5 by about 80%, and the deformation under working pressure does not exceed 0.05mm, ensuring operational stability under high-speed stirring conditions; and the spherical end of the stirring shaft 2 fits in the spherical groove of the support crossbar 53, forming a self-aligning joint structure that can automatically compensate for ±2° axis deflection, so that the bearing load is evenly distributed and the service life is extended. Because the ball-groove design forms a mechanical limit protection, when the stirring torque exceeds the rated value, the slip protection is automatically triggered, effectively preventing overload damage to the motor 4. Actual measured data shows that this structure can reduce the vibration value of the equipment and reduce the rate of unexpected downtime. The spherical contact surface can be coated with hard alloy, which can maintain long-term maintenance-free operation in a slurry environment containing abrasive particles.

[0039] In one embodiment of the present invention, the stirring mechanism includes four stirrers 2 evenly arranged along the circumference of the discharge section pipeline 1 , and every two stirrers 2 are symmetrically arranged at the same axial position of the discharge section pipeline 1 .

[0040] It should be noted that the multi-layer arrangement of agitators 2, with two agitators 2 symmetrically positioned within the same layer, not only improves the mixing effect but also achieves a compact structure. The four agitators 2 form a "bisymmetrical force field," generating superimposed vortices in the cross-section of the discharge pipe 1, significantly improving mixing efficiency compared to a single-layer agitator. In a multi-layer arrangement, adjacent agitators can be staggered at 45°, forming a three-dimensional mixing network. The coefficient of variation of mixing uniformity can be controlled within 2.8%. The symmetrical structure completely offsets radial unbalanced forces, significantly reducing equipment vibration. This compact design not only maintains the pipe cross-sectional flow rate but also increases the mixing power density.

[0041] In summary, the present invention's mine goaf filling device not only solves the technical challenges of conventional filling devices, such as uneven mixing, clogging, and difficult maintenance, but also achieves comprehensive improvements in filling quality, operational efficiency, and economic benefits through system optimization. It is particularly suitable for demanding conditions such as high-concentration filling and tailings paste filling in deep mines, providing a reliable technical solution for modern mine filling operations.

[0042] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

[0043] In the description herein, numerous specific details, such as examples of components and / or methods, are provided to provide a complete understanding of the embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more of the specific details or with other devices, systems, assemblies, methods, components, materials, parts, etc. In other cases, well-known structures, materials, or operations are not specifically shown or described in detail to avoid obscuring aspects of the embodiments of the present invention.

[0044] Reference throughout this specification to "one embodiment," "an embodiment," or "a specific embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention, and not necessarily in all embodiments. Thus, various appearances of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout this specification are not necessarily referring to the same embodiment. Furthermore, the particular features, structures, or characteristics of any specific embodiment of the invention may be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the invention described and illustrated herein are possible in light of the teachings herein and are considered part of the spirit and scope of the invention.

[0045] It should also be understood that one or more of the elements shown in the figures may also be implemented in a more separate or more integrated manner, or even removed because they are inoperable in certain circumstances or provided because they may be useful depending on the application.

[0046] In addition, unless otherwise expressly indicated, any marking arrows in the drawings should be regarded as illustrative only and not limiting. Furthermore, unless otherwise indicated, the term "or" as used herein is generally intended to mean "and / or." Where a term is unclear in providing separation or combination capabilities, the combination of components or steps will also be considered as indicated.

[0047] As used in the description herein and throughout the claims that follow, “a,” “an,” and “the” include plural references unless otherwise indicated. Likewise, as used in the description herein and throughout the claims that follow, the meaning of “in” includes “in” and “on” unless otherwise indicated.

[0048] The above description of the illustrated embodiments of the present invention is not intended to be exhaustive or to limit the invention to the precise forms disclosed herein. Although specific embodiments of the present invention and examples of the present invention are described herein for illustrative purposes only, as those skilled in the art will recognize and appreciate, various equivalent modifications are possible within the spirit and scope of the present invention. As noted, modifications may be made to the present invention in light of the above description of the embodiments of the present invention, and such modifications will be within the spirit and scope of the present invention.

[0049] Systems and methods have been generally described herein in detail to facilitate understanding of the present invention. In addition, various specific details have been given to provide an overall understanding of embodiments of the present invention. However, those skilled in the relevant art will recognize that embodiments of the present invention may be practiced without one or more of these specific details, or with other devices, systems, accessories, methods, components, materials, parts, etc. In other cases, well-known structures, materials, and / or operations are not specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

[0050] Thus, although the invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are contemplated within the foregoing disclosure, and it should be understood that in some cases, some features of the invention will be employed without the corresponding use of other features without departing from the scope and spirit of the claimed invention. Thus, many modifications may be made to adapt a particular environment or material to the true scope and spirit of the invention. The invention is not intended to be limited to the specific terminology used in the claims below and / or to the specific embodiments disclosed as the best mode contemplated for carrying out the invention, but the invention is intended to include any and all embodiments and equivalents falling within the scope of the appended claims. Thus, the scope of the invention will be determined solely by the appended claims.

Claims

1. A device for filling materials in a mine goaf, characterized in that: include: Unloading section pipeline (1); A stirring mechanism, the stirring mechanism comprising at least two stirrers (2) arranged along the circumference of the feed section pipeline (1), the stirring shaft (21) of each stirrer (2) being inclined at an angle to the axial direction of the feed section pipeline (1); A spray mechanism comprises at least two sprayers (3) arranged along the circumference of the unloading section pipeline (1), and a spray head (31) of each spray mechanism is arranged at the feed inlet of the unloading section pipeline (1).

2. A device for filling a mine goaf according to claim 1, characterized in that: Each of the stirrers (2) is of a spiral type, and one end of the stirring shaft (21) of the stirrer (2) is connected to the output shaft of the motor (4), and the other end extends to the central axis of the discharge section pipeline (1).

3. A device for filling a mine goaf according to claim 2, characterized in that: Each of the motors (4) is mounted on the outer wall of the unloading section pipe (1), and each of the stirring shafts (21) passes through the side wall of the unloading section pipe (1) via a sealed bearing.

4. A device for filling a mine goaf according to claim 1, characterized in that: Each of the sprayers (3) comprises a spray pipe (32) and a spray head (31), one end of the spray pipe (32) is connected to a feed pipe (33), and the other end of the spray pipe (32) extends toward the central axis of the discharge section pipeline (1).

5. A device for filling a mine goaf according to claim 4, characterized in that: Each of the spray pipes (32) passes through the side wall of the unloading section pipeline (1) and is sealed to the side wall of the unloading section pipeline (1) via a pipe sleeve.

6. A device for filling a mine goaf according to claim 5, characterized in that: It also includes a support frame (5), the support frame (5) is arranged in the unloading section pipeline (1), and the sealing bearing and the pipe sleeve are installed on the support frame (5).

7. The device for filling a mine goaf according to claim 5, characterized in that: The support frame (5) comprises at least two support rings (51) and two support vertical rods (52), each of the support rings (51) is coaxially arranged in the discharge section pipeline (1), and the support vertical rods (52) connect the support rings (51) and are arranged axially parallel to the discharge section pipeline (1).

8. A device for filling a mine goaf according to claim 7, characterized in that: The support frame (5) further comprises a pair of support cross bars (53) arranged horizontally and crosswise, and the pair of support cross bars (53) are respectively fixedly connected to the support vertical bars (52).

9. A device for filling a mine goaf according to claim 8, characterized in that: The extended end of each stirring shaft (21) is a spherical end, and a matching spherical groove is provided on the supporting crossbar (53).

10. A device for filling materials in a mine goaf according to claim 9, characterized in that: The stirring mechanism comprises four stirrers (2) uniformly arranged along the circumference of the discharge section pipeline (1), and every two stirrers (2) are symmetrically arranged at the same axial position of the discharge section pipeline (1).

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