阅读说明：本技术 一种井下充填外加剂混合装置 (Underground filling additive mixing device ) 是由 黄小忠 石永豹 李国平 于 2020-07-24 设计创作，主要内容包括：本发明公开了一种井下充填外加剂混合装置,属于矿山充填工艺技术领域,它的创新点在于,它包括外加剂容器、增压装置、充填管和外加剂混合装置；所述外加剂混合装置设置在充填管上；所述外加剂容器、增压装置和外加剂混合装置通过外加剂输送管依次相连。本发明所述的一种井下充填外加剂混合装置可以很好的解决外加剂添加、混匀及快速输送的问题,从而在实际生产中大幅度的提高了充填接顶率,有效的降低了生产安全风险,提高了矿山的经济效益,该装置设计合理,结构简单,制作方便,应用成本低,效果好,值得在各类矿山推广应用,实用性强。(The invention discloses an underground filling additive mixing device, which belongs to the technical field of mine filling processes and has the innovation points that the underground filling additive mixing device comprises an additive container, a supercharging device, a filling pipe and an additive mixing device; the admixture mixing device is arranged on the filling pipe; the additive container, the supercharging device and the additive mixing device are sequentially connected through an additive conveying pipe. The underground filling additive mixing device can well solve the problems of additive addition, mixing and quick conveying, so that the filling roof contact rate is greatly improved in actual production, the production safety risk is effectively reduced, the economic benefit of mines is improved, the underground filling additive mixing device is reasonable in design, simple in structure, convenient to manufacture, low in application cost, good in effect, worthy of popularization and application in various mines, and high in practicability.)

1. The underground admixture filling mixing device is characterized by comprising an admixture container (1), a supercharging device (2), a filling pipe (3) and an admixture mixing device (4); the admixture mixing device (4) is arranged on the filling pipe (3); the additive container (1), the supercharging device (2) and the additive mixing device (4) are sequentially connected through an additive conveying pipe (6).

2. The admixture mixing apparatus for a downhole filling according to claim 1, wherein the admixture mixing apparatus (4) comprises an inner liner (44); the two ends of the lining pipe (44) are respectively provided with a variable connection pipe (41), the outer side of the lining pipe is fixedly provided with a shell pipe (42), and the pipe wall of the lining pipe is uniformly provided with a plurality of injection devices along the axial direction; a cavity (43) is formed between the shell pipe (42) and the lining pipe (44), and a conveying pipe orifice (45) is arranged on the pipe wall in a penetrating way; the conveying pipe orifice (45) is communicated with the other end of the additive conveying pipe (6) connected to the supercharging device (2), and the two variable connecting pipes (41) are respectively communicated with the filling pipe (3).

3. The mixing device for the additives filled in the well as claimed in claim 2, wherein each spraying device comprises a plurality of through holes uniformly formed along the circumference of the wall of the lining pipe (44), and a nozzle (46) is installed in each through hole.

4. The mixing apparatus for the admixture of the underground filling according to claim 3, wherein the number of the through holes of each of the injecting means is 6, and the through holes are equally spaced at 60 ° along the circumference of the wall of the lining pipe (44).

5. The mixing device for the additives filled in the well according to claim 1, wherein the pressurizing device (2) is a pressurizing pump.

Technical Field

The invention belongs to the technical field of underground mine filling processes, and particularly relates to an underground filling additive mixing device.

Background

In recent years, the filling mining method is widely applied to metal mines and nonmetal mines, so that large disasters such as surface subsidence, ground collapse rock burst, rock caving (roof caving) and the like are well avoided. The filling operation of underground mining is to fill the goaf by artificially forming a filling body, to solve the problem of the transmission and adjustment of unbalanced stress of the stope, to make the original rock stress field reach a stable state again, and is an important process of preparation operation before secondary mining. In the actual filling process, due to the influences of various factors such as slurry segregation, filling body bleeding and sinking, irregular goaf top plate, human reasons and the like, the goaf filling roof-contacting rate is generally low, and the phenomena of frequent ground pressure movement, surrounding rock movement, roof collapse, rib spalling and the like are caused to happen occasionally.

The liquid additive is added into the filling slurry, so that the bleeding settlement of a filling body can be reduced, the micro-expansion effect can be realized, and the problem of low roof contact rate can be effectively solved. However, the reaction speed of the admixture in the filling slurry is high, the time is short, the admixture is added and stirred in an earth surface filling station, the pipeline is easy to be blocked, and the filling expansion effect of the admixture is ineffective after the admixture reaches the goaf, so that the problem that how to add the admixture into the filling slurry, uniformly mix the admixture and quickly fill the admixture into the goaf is very troublesome is solved.

Disclosure of Invention

Aiming at the problems of difficulty in addition, uniform mixing and rapid conveying of the admixture during filling of slurry in the underground goaf in the prior art, the invention provides the underground filling admixture mixing device, which can realize addition of the admixture, thereby avoiding the problems of pipeline blockage, admixture failure and the like.

The technical scheme for solving the technical problem of the invention is as follows:

the invention discloses an underground filling additive mixing device which is characterized by comprising an additive container, a supercharging device, a filling pipe and an additive mixing device; the admixture mixing device is arranged on the filling pipe; the additive container, the supercharging device and the additive mixing device are sequentially connected through an additive conveying pipe.

As a further improvement of the technical proposal of the invention, the admixture mixing device comprises an inner lining pipe; the two ends of the lining pipe are respectively provided with a variable connection pipe, the outer side of the lining pipe is fixedly provided with a shell pipe, and the pipe wall of the lining pipe is uniformly provided with a plurality of injection devices along the axial direction; a cavity is formed between the shell pipe and the lining pipe, and a conveying pipe orifice penetrates through the pipe wall of the cavity; the conveying pipe orifice is communicated with the other end of the additive conveying pipe connected to the supercharging device, and the two variable connecting pipes are respectively communicated with the filling pipe.

As a further improvement of the technical scheme of the invention, each spraying device comprises a plurality of through holes uniformly formed along the circumference of the pipe wall of the lining pipe, and a nozzle is arranged in each through hole.

As a further improvement of the technical scheme of the invention, the number of the through holes of each injection device is 6, and the through holes are evenly distributed along the circumference of the pipe wall of the lining pipe by 60 degrees.

As a further improvement of the technical scheme of the invention, the pressurizing device is a pressurizing pump.

When the underground filling additive mixing device is applied, the filling pipe is used for conveying and filling slurry, the filling pipe extends into a goaf, the additive mixing device is arranged on the filling pipe at the inlet of the goaf, the additive container and the supercharging device are sequentially connected, the additive in the additive container is pressurized by the supercharging device and then conveyed into a cavity of the additive mixing device while the slurry is conveyed to the goaf through the filling pipe, the additive is diffused in the cavity along the axial direction and the radial direction, and then is injected into the lining pipe through all nozzles under pressure to be fully mixed with the slurry and then directly conveyed into the goaf, so that the additive failure and pipe blockage are effectively avoided.

Compared with the prior art, the underground filling additive mixing device can well solve the problems of additive addition, mixing and quick conveying, thereby greatly improving the filling roof contact rate in actual production, effectively reducing the production safety risk and improving the economic benefit of mines; the mixing device for the underground filling additives, provided by the invention, has the advantages of reasonable design, simple structure, convenience in manufacturing, low application cost, good effect, high practicability and high popularization and application value in various mines.

Drawings

The invention is further described with reference to the following figures and detailed description:

FIG. 1 is a schematic structural view of a mixing apparatus for an admixture for downhole filling according to the present invention;

FIG. 2 is a schematic view showing the construction of the admixture mixing apparatus according to the present invention;

FIG. 3 is a schematic view of the structure of FIG. 2 taken along line A-A;

in the figure: 1. the device comprises an additive container, 2, a supercharging device, 3, a filling pipe, 4, an additive mixing device, 5, a goaf, 6, an additive conveying pipe, 41, a variable connecting pipe, 42, a shell pipe, 43, a cavity, 44, an inner lining pipe, 45, a conveying pipe orifice, 46 and a nozzle.

Detailed Description

As shown in fig. 1 to 3, the inventive downhole filling admixture mixing device is characterized in that it comprises an admixture container 1, a pressurizing device 2, a filling pipe 3 and an admixture mixing device 4; the admixture mixing device 4 is arranged on the filling pipe 3; the additive container 1, the supercharging device 2 and the additive mixing device 4 are connected in sequence through an additive conveying pipe 6. In this embodiment, the pressure increasing device 2 may be further configured as a pressure pump.

In this embodiment, the admixture mixing apparatus 4 comprises an inner liner pipe 44; the two ends of the lining pipe 44 are respectively provided with a variable connection pipe 41, the outer side of the lining pipe is fixedly provided with a shell pipe 42, and the pipe wall of the lining pipe is uniformly provided with a plurality of injection devices along the axial direction; a cavity 43 is formed between the shell tube 42 and the lining tube 44, and a conveying pipe orifice 45 is arranged on the wall of the cavity in a penetrating manner; the conveying pipe orifice 45 is communicated with the other end of the additive conveying pipe 6 connected to the supercharging device 2, and the two variable connecting pipes 41 are respectively communicated with the filling pipe 3. In this embodiment, the lining pipe 44 and the shell pipe 42 form a double-layer hollow round cavity with a certain thickness, and the cavity 43 is communicated with the additive conveying pipe 6 for additive addition and pressurization.

In this embodiment, each of the injection devices includes a plurality of through holes uniformly formed along the circumference of the wall of the inner liner 44, and each of the through holes is provided with a nozzle 46. Further, the number of the through holes of each injection device is 6, and the through holes are equally distributed along the circumference of the pipe wall of the lining pipe 44 by 60 degrees. In this embodiment, the nozzles 46 are uniformly distributed along the radial direction on the liner tube 44, so that when the admixture is added, the admixture can be fully and uniformly mixed with the filling slurry through each nozzle 46, and the filling effect of the gob is improved.

When the device is applied, the filling pipe 3 is used for conveying and filling the filling slurry 7, the filling pipe 3 extends into the goaf 5, the additive mixing device 4 is arranged on the filling pipe 3 at the inlet of the goaf 5, the additive container 1 and the supercharging device 2 are sequentially connected, the additive in the additive container 1 is pressurized by the supercharging device 2 and then is conveyed into the cavity 43 of the additive mixing device 4 while the slurry is conveyed to the goaf 5 through the filling pipe 3, the additive is injected into the lining pipe 44 through the nozzles 46 under pressure after being diffused in the cavity 43 along the axial direction and the radial direction and is fully mixed with the filling slurry 7, and then the mixture is directly conveyed into the goaf 5, so that the additive failure and pipe blockage are effectively avoided, and the problem of low goaf roof contact rate is effectively solved.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.