Three-in-one gangue slurry filling system for overlying strata space of stope

Abstract

The utility model discloses a stope overlying strata space three-in-one gangue slurry filling system which comprises a ground gangue slurry preparation system, and the output end of a grouting filling pump is connected with the input end of a gangue slurry underground conveying pipeline and the input end of a gangue slurry ground conveying pipeline. The output end of the gangue slurry underground conveying pipeline is connected with the input end of the low-position grouting filling pipe and the input end of the adjacent-position grouting filling pipe, the output end of the adjacent-position grouting filling pipe is connected with the input end of the adjacent-position grouting drill hole, and the output end of the gangue slurry ground conveying pipeline is connected with the input end of the separation grouting drill hole. According to the utility model, gangue slurry is filled into the caving zone through the low-position grouting filling pipe by utilizing the slurry filling control system, the gangue slurry is filled into the fissure zone through the adjacent grouting drill holes, and the gangue slurry is filled into the separation zone in the bent sinking zone through the separation grouting drill holes. Under the condition that normal production of a working face is not affected, the gangue slurry is safely and efficiently filled into an overlying strata space in a large-scale and low-cost mode.

Description

Technical Field

[0001] The utility model belongs to the technical field of mining, and in particular relates to a three-in-one gangue slurry filling system for a covering rock space in a stope. Background Art

[0002] Coal mines are bound to produce a large amount of washed gangue during the production process. The current disposal methods for washed gangue include ground stacking, underground filling and comprehensive utilization. Gangue is piled on the ground to form a gangue mountain unique to coal mines, which is a traditional disposal method. There are already thousands of gangue mountains in China, which not only occupy local land resources, but also cause great damage to the local water, soil, atmosphere and other ecological environments. At present, this treatment method has been explicitly prohibited by law; with the rapid development of underground filling in coal mines, the use of washed gangue as filling material to fill underground has become the main way for most mines to solve the problem of washed gangue, but the existing filling methods have low adaptability, low filling efficiency, high filling cost and complex process, which makes the existing filling methods cannot be widely used, and can only solve the problem of green disposal of a small amount of gangue in a few areas; the current comprehensive utilization of washed gangue mainly includes brick making, power generation, fertilizer making and building materials, but it cannot be disposed of on a large scale due to sales radius, production cost and other reasons. Therefore, taking into account the existing gangue disposal methods and combining them with the existing filling methods, a three-in-one gangue slurry filling method for the overburden space in the mining area is proposed to solve the green disposal problem of washed gangue in a safe, efficient, large-scale and low-cost manner without affecting the normal production of the working face. Utility Model Content

[0003] The utility model aims to provide a three-in-one gangue slurry filling system for the overburden space of the mining area, which can solve the problem of green disposal of washed gangue safely, efficiently and at low cost without affecting the normal production of the working face.

[0004] The technical scheme adopted by the utility model is: a three-in-one gangue slurry filling system for the overburden space of a mining field, including a ground gangue slurry preparation system, the ground gangue slurry preparation system including a grouting filling pump, the output end of the grouting filling pump is respectively connected to the input end of the gangue slurry underground transportation pipeline and the gangue slurry ground transportation pipeline, the output end of the gangue slurry underground transportation pipeline is respectively connected to the input end of the low-position grouting filling pipe and the adjacent grouting filling pipe, the output end of the adjacent grouting filling pipe is connected to the input end of the adjacent grouting borehole, and the output end of the gangue slurry ground transportation pipeline is connected to the input end of the separation grouting borehole; the ground gangue slurry preparation system, the gangue slurry underground transportation pipeline, the gangue slurry ground transportation pipeline, the low-position grouting filling pipe and the adjacent grouting filling pipe are all controlled by a slurry filling control system.

[0005] The utility model is also characterized in that:

[0006] The ground gangue slurry preparation system includes a gangue bin, which is connected to the crushing system through a No. 1 transfer belt, and the crushing system is connected to a pulping mixer and a buffer mixer in sequence through a No. 2 transfer belt, and the pulping mixer is connected to a water supply system.

[0007] The low-position grouting filling pipe is retained at the bottom plate of the collapse zone, and there is a slurry outlet every 25m. The adjacent grouting boreholes are formed by drilling upward inclined holes from the adjacent tunnels to the fracture zone, and the delamination grouting boreholes are formed by vertical drilling from the ground to the delamination area in the curved sinking zone.

[0008] The low-position grouting filling pipe is filled with gangue slurry into the collapsed zone, the adjacent grouting borehole is filled with gangue slurry into the fracture zone, and the delamination grouting borehole is filled with gangue slurry into the delamination area within the curved sinking zone.

[0009] The underground conveying pipeline of gangue slurry and the surface conveying pipeline of gangue slurry do not work at the same time, and the low-position grouting filling pipe and the adjacent-position grouting filling pipe do not work at the same time.

[0010] The adjacent grouting drilling starts 50 to 100 meters after the coal mining face is mined, and the separation grouting drilling starts before the coal mining face is mined.

[0011] Compared with the prior art, the utility model has the following beneficial technical effects:

[0012] The utility model provides a three-in-one gangue slurry filling system for the overburden space in the mining field, which can make full use of the collapse zone space, the fissure zone space and the delamination space of the curved sinking zone formed in the mining field after the coal mining working face is recovered, and can fill the gangue slurry into the overburden space safely, efficiently, on a large scale and at low cost without affecting the normal production of the working face, and finally realize the green disposal of washed gangue. The three-in-one gangue slurry filling system for the overburden space in the mining field can not only realize the green disposal of washed gangue and mine water, but also the filled gangue slurry can limit the further settlement of the overburden in the mining field, thereby reducing surface collapse and subsidence. Compared with the existing solid and paste filling of the working face, this filling method has a simple process, higher efficiency, lower cost, and does not require the arrangement of a separate coal mining working face. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the three-in-one gangue slurry filling system for the overburden space in the mining area of ​​the utility model;

[0014] In the figure: 1—ground gangue slurry preparation system, 2—gangue slurry underground transportation pipeline, 3—gangue slurry ground transportation pipeline, 4—low-position grouting filling pipe, 5—adjacent grouting filling pipe, 6—adjacent grouting borehole, 7—detachment grouting borehole, 8—collapse zone, 9—fracture zone, 10—bent sinking zone, 11—gangue bin, 12—No. 1 transfer belt, 13—crushing system, 14—No. 2 transfer belt, 15—slurry making mixer, 16—buffer mixer, 17—grouting filling pump, 18—water supply system, 19—slurry filling control system, 20—coal mining face. DETAILED DESCRIPTION

[0015] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0016] Example 1

[0017] The utility model discloses a three-in-one gangue slurry filling system for the overburden space of a mining area, such as Figure 1 As shown, it includes a ground gangue slurry preparation system 1, which includes a grouting filling pump 17. The output end of the grouting filling pump 17 is respectively connected to the input end of the gangue slurry underground transportation pipeline 2 and the gangue slurry surface transportation pipeline 3, the output end of the gangue slurry underground transportation pipeline 2 is respectively connected to the input end of the low-position grouting filling pipe 4 and the adjacent grouting filling pipe 5, the output end of the adjacent grouting filling pipe 5 is connected to the input end of the adjacent grouting borehole 6, and the output end of the gangue slurry surface transportation pipeline 3 is connected to the input end of the delamination grouting borehole 7; the ground gangue slurry preparation system 1, the gangue slurry underground transportation pipeline 2, the gangue slurry surface transportation pipeline 3, the low-position grouting filling pipe 4 and the adjacent grouting filling pipe 5 are all controlled by the slurry filling control system 19.

[0018] Example 2

[0019] Based on Example 1,

[0020] The ground gangue slurry preparation system 1 includes a gangue bin 11, which is connected to a crushing system 13 via a No. 1 transfer belt 12. The crushing system 13 is connected to a pulping mixer 15 and a buffer mixer 16 in sequence via a No. 2 transfer belt 14. The pulping mixer 15 is connected to a water supply system 18, and the buffer mixer 16 is connected to a grouting filling pump 17.

[0021] The gangue powder is sent from the gangue bin 11 to the crushing system by the No. 1 transfer belt to obtain gangue powder with a particle size of less than 3 mm. The gangue powder is sent to the pulping mixer by the No. 2 transfer belt. The water supply system simultaneously transports mine water to the pulping mixer for mixing to form gangue slurry. The buffer mixer 16 is used as a temporary storage mechanism to store the slurry, and then the slurry is sent to the delamination grouting borehole and the adjacent grouting borehole through the gangue slurry underground transportation pipeline and the gangue slurry ground transportation pipeline respectively.

[0022] The low-position grouting filling pipe 4 is retained on the bottom plate of the collapse zone 8, and there is a slurry outlet every 25m. The adjacent grouting borehole 6 is formed by drilling an upward inclined hole from the adjacent tunnel to the fracture zone 9, and the adjacent grouting borehole construction begins 50 to 100m after the coal mining face is recovered. The separation layer grouting borehole 7 is formed by vertical drilling from the ground to the separation layer area in the curved sinking zone 10, and the separation layer grouting borehole construction begins before the coal mining face is recovered.

[0023] The low-position grouting filling pipe 4 is filled with gangue slurry toward the collapse zone 8, the adjacent grouting borehole 6 is filled with gangue slurry toward the fracture zone 9, and the delamination grouting borehole 7 is filled with gangue slurry toward the delamination area in the curved sinking zone 10.

[0024] The underground conveying pipeline of gangue slurry and the surface conveying pipeline of gangue slurry do not work at the same time, and the low-position grouting filling pipe and the adjacent-position grouting filling pipe do not work at the same time.

[0025] Example 3

[0026] The three-in-one gangue slurry filling method for the overburden space of the stope specifically comprises the following steps:

[0027] a. Establishing a surface gangue slurry preparation system 1 and a slurry filling control system 19 on the ground, arranging a gangue slurry underground conveying pipeline 2, a gangue slurry surface conveying pipeline 3, a low-position grouting filling pipe 4 and an adjacent grouting filling pipe 5, and drilling a separation grouting borehole 7;

[0028] b. When the coal mining face advances to 50 m, the slurry filling control system 19 operates the surface gangue slurry preparation system 1, the gangue slurry underground transportation pipeline 2 and the low-position grouting filling pipe 4 to fill the gangue slurry into the collapse zone 8;

[0029] c. As the coal mining face 20 advances, the adjacent grouting borehole 6 is drilled at the same time, and the distance between the adjacent grouting borehole 6 and the coal mining face 20 is kept greater than 50m. When the coal mining face advances to 100m, the slurry filling control system 19 stops filling the gangue slurry into the collapse zone 8, and the adjacent grouting filling pipe 5 is operated to fill the gangue slurry into the fracture zone 9 through the adjacent grouting borehole;

[0030] d. When the coal mining face advances to 150 m, the filling of gangue slurry into the fracture zone 9 is stopped through the slurry filling control system 19, and the gangue slurry surface conveying pipeline 3 is operated to fill the gangue slurry into the delamination area in the curved sinking zone 10 through the delamination grouting borehole;

[0031] e. When the coal mining face advances to 200 m, the slurry filling control system 19 stops filling the gangue slurry into the delamination area within the curved sinking zone 10, and the gangue slurry underground transportation pipeline 2 and the low-level grouting filling pipe 4 are operated to fill the gangue slurry into the collapse zone 8, and this cycle is repeated until the coal mining face advances to the stop-mining line, completing the three-in-one gangue slurry filling of the overburden space in the mining area.

[0032] The low-position grouting filling pipe 4 is retained on the bottom plate of the collapse zone 8, and there is a slurry outlet every 25 meters. The adjacent grouting borehole 6 is formed by drilling an upward inclined hole from the adjacent tunnel to the fracture zone 9, and the adjacent grouting borehole 6 starts to be constructed 50 to 100 meters after the coal mining face 20 is mined. The delamination grouting borehole 7 is formed by vertically drilling from the ground to the delamination area in the curved sinking zone 10, and the delamination grouting borehole 7 starts to be constructed before the coal mining face 20 is mined.

[0033] Gangue slurry is composed of gangue powder and water, and the particle size is less than 3mm.

Claims

1. The three-in-one gangue slurry filling system for the overburden space of the mining area is characterized by: The invention comprises a surface gangue slurry preparation system (1), wherein the surface gangue slurry preparation system (1) comprises a grouting filling pump (17), wherein the output end of the grouting filling pump (17) is respectively connected to the input end of a gangue slurry underground transportation pipeline (2) and a gangue slurry surface transportation pipeline (3), wherein the output end of the gangue slurry underground transportation pipeline (2) is respectively connected to the input end of a low-position grouting filling pipe (4) and an adjacent-position grouting filling pipe (5), wherein the adjacent-position grouting filling pipe (5) is connected to the input end of a low-position grouting filling pipe (4) and an adjacent-position grouting filling pipe (5). The output end of the adjacent grouting filling pipe (5) is connected to the input end of the adjacent grouting borehole (6), and the output end of the gangue slurry ground transportation pipeline (3) is connected to the input end of the separation layer grouting borehole (7); the ground gangue slurry preparation system (1), the gangue slurry underground transportation pipeline (2), the gangue slurry ground transportation pipeline (3), the low-position grouting filling pipe (4) and the adjacent grouting filling pipe (5) are all controlled by the slurry filling control system (19).

2. The three-in-one gangue slurry filling system for the overburden space of the stope according to claim 1 is characterized in that: The ground gangue slurry preparation system (1) comprises a gangue bin (11), wherein the gangue bin (11) is connected to a crushing system (13) via a No. 1 transfer belt (12), wherein the crushing system (13) is connected to a pulping mixer (15) and a buffer mixer (16) in sequence via a No. 2 transfer belt (14), and the pulping mixer (15) is connected to a water supply system (18).

3. The three-in-one gangue slurry filling system for the overburden space of the stope according to claim 1 is characterized in that: The low-position grouting filling pipe (4) is retained on the bottom plate of the collapse zone (8) and has a slurry outlet every 25 m. The adjacent grouting borehole (6) is formed by drilling an upward inclined hole from the adjacent tunnel toward the fracture zone (9), and the separation grouting borehole (7) is formed by vertically drilling from the ground to the separation zone in the curved sinking zone (10).

4. The three-in-one gangue slurry filling system for the overburden space of the stope according to claim 1 is characterized in that: The low-position grouting filling pipe (4) is filled with gangue slurry into the collapsed zone (8), the adjacent grouting borehole (6) is filled with gangue slurry into the fracture zone (9), and the separation layer grouting borehole (7) is filled with gangue slurry into the separation layer area in the curved subsidence zone (10).

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