Post-filling grouting device for fully-mechanized mining frame

Abstract

The utility model discloses a rear filling grouting device of a fully-mechanized mining frame, which relates to the technical field of coal mining and comprises the fully-mechanized mining frame, a grouting pipe and an olecranon-shaped waste rock separating protective pipe device, the fully-mechanized mining frame comprises a shield beam, and the waste rock separating protective pipe device is fixedly arranged on the upper end face of the shield beam. The gangue separating protective pipe device is provided with a gangue separating blade edge positioned at the top of the gangue separating protective pipe device, material guiding inclined surfaces symmetrically arranged on two sides of the gangue separating blade edge, and a protective pipe surface bordered with the lower ends of the material guiding inclined surfaces. The gangue separating blade edge can separate caving gangue during roof cutting collapse, the material guiding inclined surface guides the falling caving gangue, the caving gangue is prevented from falling in a goaf right behind the shield beams in a concentrated mode, the probability that the gangue falls into the goaf between the shield beams of the two adjacent fully-mechanized mining frames is increased, the caving gangue is evenly distributed, and the caving gangue is prevented from falling into the goaf right behind the shield beams. Therefore, the mixing uniformity of slurry and goaf gangue is improved, and the grouting effect and the stability of a filling body are improved; and the grouting pipe is embedded in the gangue separation pipe protection device, so that the gangue can be prevented from damaging the grouting pipe, and the grouting stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mining, in particular to a post-filling grouting device for a fully mechanized mining frame. Background Art

[0002] During the comprehensive mining process, in order to effectively control stratum movement and reduce the risk of collapse in the goaf, it is necessary to design a filling grouting pipe at the opening of the protective beam to inject slurry into the goaf behind the comprehensive mining frame through the filling grouting pipe.

[0003] When the top-cutting waste rock falls down during the cutting, it will slide down along the protective beam and fall into the goaf directly behind the protective beam. On the one hand, the waste rock may come into contact with the filling grouting pipe during the sliding process, causing damage to the filling grouting pipe. On the other hand, when the top-cutting waste rock slides down on the protective beam, it will be concentrated in the goaf directly behind the protective beam, resulting in too little waste rock falling into the goaf between the protective beams of two adjacent comprehensive mining frames. Due to the uneven distribution of the collapsed top-cutting waste rock, after the filling grouting pipe injects the slurry into the goaf, there will be problems such as uneven mixing of the slurry and the goaf waste rock, and unsatisfactory grouting effect, which affects the stability of the filling body. Utility Model Content

[0004] Based on this, it is necessary to provide a post-filling grouting device for a comprehensive mining frame to address the above-mentioned technical problems.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a post-filling grouting device for a comprehensive mining frame, comprising a comprehensive mining frame and a grouting pipe, the comprehensive mining frame comprising a protective beam, and also comprising an eagle-beak-shaped gangue dividing pipe protection device, the gangue dividing pipe protection device is fixedly installed on the upper end surface of the protective beam, the gangue dividing pipe protection device has a gangue dividing blade edge located at the top thereof, material guiding slopes symmetrically arranged on both sides of the gangue dividing blade edge and a pipe protection surface bordering the lower end of the material guiding slope; the gangue dividing blade edge can separate the top gangue when the top is cut and collapsed, and the material guiding slope guides the top gangue to a direction away from the gangue dividing blade edge; the grouting pipe is embedded in the gangue dividing pipe protection device, and the output end of the grouting pipe passes through the pipe protection surface.

[0006] Preferably, the output end of the grouting pipe is located directly below the rock dividing edge.

[0007] Preferably, the vertical projection of the pipe protection surface and the vertical projection of the grouting pipe output end are both located on the vertical projection of the material guiding slope.

[0008] Preferably, the input end of the grouting pipe passes downward through the shield beam.

[0009] Preferably, the grouting direction of the output end of the grouting pipe is inclined downward.

[0010] Preferably, the output end of the grouting pipe is arranged flush with the protective pipe surface.

[0011] Preferably, the gangue separation protection pipe device is a solid structure.

[0012] Preferably, the gangue dividing edge includes a first edge and a second edge bordering the lower end of the first edge, the material guiding slope includes a first slope and a second slope bordering the lower end of the first slope, the first slope is symmetrically arranged on both sides of the first edge, the second slope is symmetrically arranged on both sides of the second edge, and the slope of the second edge is greater than the slope of the first edge.

[0013] Preferably, the length of the first edge is greater than the length of the second edge, and the width of the first inclined surface is less than the width of the second inclined surface.

[0014] Compared with the prior art, this technical solution has at least one of the following beneficial effects:

[0015] The grouting pipe is protected by setting up a gangue pipe protection device to prevent the collapsed gangue from contacting the grouting pipe and damaging the grouting pipe, thereby improving the stability of grouting, reducing the difficulty of grouting operation and labor costs, and improving production efficiency;

[0016] Mixing the top gangue with the slurry not only improves the stability and strength of the filling body, but also realizes the effective utilization of waste, which is beneficial to environmental protection and sustainable development;

[0017] The gangue separation pipe device has an eagle-beak-shaped structure, which can guide the gangue to both sides, avoiding the gangue from falling on the goaf behind the protective beam, increasing the probability of gangue falling into the goaf between the protective beams of two adjacent fully mechanized mining frames, making the gangue evenly distributed, thereby improving the mixing uniformity of slurry and goaf gangue, and improving the grouting effect and the stability of the filling body;

[0018] By setting the first blade edge and the second blade edge, a tip is formed at the junction of the first blade edge and the second blade edge, which helps to break the gangue falling at the tip into two or more pieces, thereby separating large pieces of gangue into multiple small pieces of gangue, avoiding large pieces of gangue from being concentrated on one side, thereby improving the uniformity of gangue distribution. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of the utility model;

[0020] Figure 2 It is a right side view of an embodiment of the utility model;

[0021] In the figure, 1. comprehensive mining frame; 11. protective beam; 2. grouting pipe; 3. waste rock separation pipe protection device; 31. waste rock separation blade edge; 311. first blade edge; 312. second blade edge; 32. material guide slope; 321. first slope; 322. second slope; 33. pipe protection surface; 4. waste rock; 5. filling body. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0023] See also Figure 1 and Figure 2 The embodiment of the present application provides a post-filling grouting device for a fully mechanized mining frame, comprising a fully mechanized mining frame 1, a grouting pipe 2 and an eagle-beak-shaped gangue separation pipe device 3.

[0024] The comprehensive mining frame 1 is a comprehensive mining hydraulic support of the prior art, and the comprehensive mining frame 1 includes a shielding beam 11, a base, a top beam, a side guard plate, a column, a connecting rod, a push device, etc. The shielding beam 11 is an important component of the comprehensive mining frame 1, and plays a supporting and protective role;

[0025] The gangue separation pipe protection device 3 is fixedly installed on the upper end surface of the shielding beam 11, and has the functions of separating the gangue 4 and protecting the grouting pipe 2; the gangue separation pipe protection device 3 has a gangue separation blade edge 31 located at the top thereof, a material guide slope 32 symmetrically arranged on both sides of the gangue separation blade edge 31, and a pipe protection surface 33 bordering the lower end of the material guide slope 32;

[0026] The top of the waste separation pipe device 3 is sharp, and the waste rock 4 on the top when the top is cut and collapsed can be separated by the waste separation blade edge 31. Separation means that the multiple waste rocks 4 falling on the waste separation pipe device 3 are evenly dispersed to both sides thereof, and the soft or brittle waste rocks 4 falling on the waste separation pipe device 3 are also broken into two or more pieces, so that the waste rocks 4 are evenly dispersed on the two guide slopes 32, and then the guide slopes 32 guide the waste rocks 4 away from the waste separation blade edge 31; the guide slopes 32 have a smooth surface, which can effectively reduce the friction resistance of the waste rocks 4 during the flow process, and ensure that the waste rocks 4 slide smoothly;

[0027] The gangue separation pipe protection device 3 has an eagle-beak-shaped structure, and the eagle-beak-shaped structure makes the thickness of the gangue separation pipe protection device 3 gradually thinner from the center to the two sides, so that the guiding slope 32 can guide the gangue 4 to the side opposite to the gangue separation blade edge 31 while tilting the gangue 4 downward, so that the probability of the gangue 4 falling into the goaf between the shielding beams 11 of two adjacent comprehensive mining frames 1 is increased, and the top gangue 4 is avoided from being concentrated in the goaf directly behind the shielding beam 11, so that the goaf directly behind the shielding beam 11 and the side rear can all fall into the top gangue 4, so that the top gangue 4 is evenly distributed, thereby improving the mixing uniformity of the slurry and the gangue 4 in the goaf, and improving the grouting effect and the stability of the filling body 5; the filling body 5 is a solid formed by injecting slurry into the goaf. In this embodiment, by providing the gangue separation pipe protection device 3 and improving the installation position of the grouting pipe 2, the filling body 5 is made more uniform, compact and stable;

[0028] The grouting pipe 2 is embedded in the gangue separation pipe protection device 3. An installation hole for the grouting pipe 2 is opened inside the gangue separation pipe protection device 3. The grouting pipe 2 is embedded in the gangue separation pipe protection device 3 by installing it in the installation hole; the output end of the grouting pipe 2 passes through the protection pipe surface 33, and after the slurry is output from the output end of the grouting pipe 2, it can be directly discharged to the goaf; because the gangue 4 has an adhesion effect on the slurry, the slurry loses fluidity and forms an accumulation behind the frame.

[0029] By setting up the gangue separation and protection pipe device 3, the gangue 4 can be reasonably distributed so as to be evenly mixed with the slurry, and the adhesion of the gangue 4 to the slurry makes the filling body 5 more uniform, stable and dense, effectively enhancing the strength of the filling body 5 and effectively controlling the risk of stratum movement and goaf collapse. At the same time, the structural design of the gangue separation and protection pipe device 3 also simplifies the grouting process, reduces the difficulty of operation and labor costs, and improves production efficiency.

[0030] In a preferred embodiment, in order to further improve the protection effect of the grouting pipe 2, please refer to Figure 1 The output end of the grouting pipe 2 is arranged flush with the protective pipe surface 33 and will not extend beyond the protective pipe surface 33. The vertical projection of the protective pipe surface 33 and the vertical projection of the output end of the grouting pipe 2 are both located on the vertical projection of the material guide slope 32. In this way, the material guide slope 32 can cover the protective pipe surface 33 and the grouting pipe 2. After the gangue 4 slides out from the material guide slope 32, it falls along a parabolic trajectory and will not contact the grouting pipe 2, thereby preventing the gangue 4 from damaging the grouting pipe 2.

[0031] In a preferred embodiment, to improve the grouting effect, refer to Figure 1 and Figure 2The rock dividing edge 31 is arranged on the central symmetric plane of the rock dividing pipe protection device 3, and the output end of the grouting pipe 2 is located directly below the rock dividing edge 31. The center of the grouting pipe 2 is also located on the central symmetric plane of the rock dividing pipe protection device 3, so that the grouting pipe 2 can evenly transport the slurry to the goaf.

[0032] In a preferred embodiment, to facilitate installation of the grouting pipe 2, refer to Figure 1 The input end of the grouting pipe 2 is set to pass through the shielding beam 11 downward, and then communicated with the slurry conveying pipeline of the underground filling pump station. The shielding beam 11 can also protect the grouting pipe 2. The grouting direction of the output end of the grouting pipe 2 is inclined downward, which can facilitate the delivery of slurry to the goaf.

[0033] In a preferred embodiment, to ensure the stability of the gangue separation pipe device 3, please refer to Figure 1 and Figure 2 The gangue separation pipe protection device 3 is set to a solid structure. The material of the gangue separation pipe protection device 3 can be cast iron or alloy steel. The gangue separation pipe protection device 3 has excellent structural strength and durability, ensuring that it has sufficient durability and impact resistance in a complex mining environment, and can effectively separate the top gangue 4 when it slides down along the protective beam 11 during top cutting and collapse.

[0034] In a preferred embodiment, to improve the separation effect of the gangue, please refer to Figure 1 and Figure 2 , the gangue dividing edge 31 is provided to include a first edge 311 and a second edge 312 bordering the lower end of the first edge 311, and the material guiding slope 32 includes a first slope 321 and a second slope 322 bordering the lower end of the first slope 321; the first slope 321 of this embodiment is symmetrically arranged on both sides of the first edge 311, and the second slope 322 is symmetrically arranged on both sides of the second edge 312, and the slope of the second edge 312 is greater than the slope of the first edge 311. The width of the first slope 321 is smaller than the width of the second slope 322, and the length of the first edge 311 is greater than the length of the second edge 312. In other embodiments, the gangue dividing edge 31 may also be straight-line, and the material guiding slope 32 may also be a whole plane.

[0035] The design of the first inclined surface 321 and the second inclined surface 322 is conducive to the uniform flow of the gangue 4. The design of the first edge 311 and the second edge 312 forms a tip at the junction of the first edge 311 and the second edge 312, which is conducive to breaking the gangue 4 falling on the tip into two or more pieces, thereby separating a large piece of gangue 4 into a plurality of small pieces of gangue 4, and improving the uniformity of the distribution of the gangue 4.

[0036] When the top is cut and collapsed, the waste rock 4 falling on the first inclined surface 321 is guided by gravity and the first inclined surface 321, tilted downward in a direction with a certain angle to the first blade edge 311, and slides to the second inclined surface 322. The waste rock 4 on the second inclined surface 322 is guided by gravity and the second inclined surface 322, tilted downward in a direction with a certain angle to the second blade edge 312, and finally falls, thereby separating the collapsed waste rock 4 above the shield beam 11, and preventing the waste rock 4 from falling in the center behind the shield beam 11. The width of the second inclined surface 322 is greater than the width of the first inclined surface 321, and the waste rock 4 can be guided to a position farther away from the center plane of the shield beam 11, so that the goaf at the gap between the shield beams 11 of the two comprehensive mining frames 1 can also fall into the waste rock 4, so that the waste rock 4 is evenly distributed, and the filling body 5 is more uniform, stable and dense.

[0037] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A post-filling grouting device for a fully mechanized mining frame, comprising a fully mechanized mining frame (1) and a grouting pipe (2), wherein the fully mechanized mining frame (1) comprises a shielding beam (11), characterized in that: It also comprises an eagle-beak-shaped gangue separation pipe protection device (3), the gangue separation pipe protection device (3) being fixedly mounted on the upper end surface of the shielding beam (11), the gangue separation pipe protection device (3) comprising a gangue separation blade edge (31) located at the top thereof, material guide slopes (32) symmetrically arranged on both sides of the gangue separation blade edge (31), and a pipe protection surface (33) bordering the lower end of the material guide slope (32); the gangue separation blade edge (31) can separate the gangue (4) released from the top when the top is cut and collapsed, and the material guide slope (32) guides the gangue (4) released from the top in a direction away from the gangue separation blade edge (31); the grouting pipe (2) is embedded in the gangue separation pipe protection device (3), and the output end of the grouting pipe (2) passes through the pipe protection surface (33).

2. The post-filling grouting device of the fully mechanized mining frame according to claim 1 is characterized in that: The output end of the grouting pipe (2) is located directly below the rock dividing edge (31).

3. The post-filling grouting device of the fully mechanized mining frame according to claim 1 is characterized in that: The vertical projection of the pipe protection surface (33) and the vertical projection of the output end of the grouting pipe (2) are both located on the vertical projection of the material guiding inclined surface (32).

4. The post-filling grouting device of the fully mechanized mining frame according to claim 1 is characterized in that: The input end of the grouting pipe (2) passes downward through the shielding beam (11).

5. The post-filling grouting device of the fully mechanized mining frame according to claim 1 is characterized in that: The grouting direction of the output end of the grouting pipe (2) is inclined downward.

6. The rear filling grouting device of the fully mechanized mining frame according to claim 1 is characterized in that: The output end of the grouting pipe (2) is arranged flush with the pipe protection surface (33).

7. The rear filling grouting device of the fully mechanized mining frame according to claim 1 is characterized in that: The gangue separation pipe protection device (3) is a solid structure.

8. The post-filling grouting device of the fully mechanized mining frame according to any one of claims 1 to 7, characterized in that: The gangue-separating edge (31) comprises a first edge (311) and a second edge (312) bordering the lower end of the first edge (311); the material-guiding inclined surface (32) comprises a first inclined surface (321) and a second inclined surface (322) bordering the lower end of the first inclined surface (321); the first inclined surface (321) is symmetrically arranged on both sides of the first edge (311); the second inclined surface (322) is symmetrically arranged on both sides of the second edge (312); and the slope of the second edge (312) is greater than the slope of the first edge (311).

9. The rear filling grouting device of the fully mechanized mining frame according to claim 8 is characterized in that: The length of the first blade edge (311) is greater than the length of the second blade edge (312), and the width of the first inclined surface (321) is less than the width of the second inclined surface (322).

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