Grouting device for goaf of coal mine

Abstract

The utility model belongs to the technical field of goaf treatment, and provides a coal mine goaf grouting device which comprises a grouting pipe, the grouting pipe comprises a plurality of main pipes and a plurality of auxiliary pipes, every two adjacent main pipes are connected through the corresponding auxiliary pipe, grout outlet holes are formed in the pipe wall of each auxiliary pipe, and the grout outlet holes are communicated with the grouting pipe. Limiting sliding blocks convexly extend out of the two ends of the auxiliary pipe in the radial direction, a strip-shaped sliding way is arranged in the main pipe in the axial direction, the two ends of the strip-shaped sliding way communicate with annular sliding ways, the limiting sliding blocks slide between the strip-shaped sliding way and the annular sliding ways, and the length of the grouting pipe is changed by sliding the limiting sliding blocks in the strip-shaped sliding way. And the length of the grouting pipe is fixed by sliding the limiting slide block in the annular slide way and staggering the limiting slide block with the strip-shaped slide way. The multi-layer goaf grouting device can conduct grouting on multiple layers of goaf distributed in the vertical direction at the same time, construction efficiency is effectively improved, meanwhile, the length of the multi-layer goaf grouting device can be contracted, transportation and storage are convenient, and functionality is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of goaf management, and in particular relates to a grouting device for goaf in a coal mine. Background Art

[0002] Goafs are the goafs such as mining areas, chambers, and tunnels left behind after mining. The distribution of goafs is multi-layered in the vertical direction. When grouting is performed on the goafs, multiple drilling and grouting are required for multiple layers of goafs, and the construction efficiency is low.

[0003] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Utility Model Content

[0004] The utility model aims to overcome the problem that the grouting device in the prior art cannot simultaneously perform grouting filling on multi-layer goaf areas, and provides a grouting device for coal mine goaf areas.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A grouting device for coal mine goaf, comprising: a grouting pipe, the grouting pipe comprising: a main pipe and a sub-pipe, the main pipe and the sub-pipe are both provided with multiple sections, each two adjacent sections of the main pipe are connected by the sub-pipe, a slurry outlet hole is provided on the pipe wall of the sub-pipe, both ends of the sub-pipe are radially protruding with limiting sliders on the outside, a strip slide is axially provided inside the main pipe, both ends of the strip slide are connected with an annular slide, the limiting slider slides between the strip slide and the annular slide, the length of the grouting pipe is changed by sliding the limiting slider in the strip slide, the length of the grouting pipe is fixed by sliding the limiting slider in the annular slide and being misaligned with the strip slide, and when the limiting slider is inside the annular slide, the slurry outlet hole on the sub-pipe corresponds to the goaf.

[0007] In the coal mine goaf grouting device as described above, preferably, the upper end thread of the main pipe at the uppermost section is sleeved with a nut.

[0008] Preferably, a reinforcing plate is provided at the bottom of the nut, and the reinforcing plate is sleeved on the outside of the corresponding main pipe;

[0009] The reinforcing plate covers the opening of the grouting hole, and the reinforcing plate is squeezed by the nut.

[0010] Preferably, rubber protrusions are provided on both the upper and lower surfaces of the limit sliding block.

[0011] Preferably, the width of the strip slideway matches the width of the limit sliding block.

[0012] Preferably, the width of the annular slideway matches the thickness of the limiting sliding block.

[0013] Preferably, the diameter of the pipe opening of the main pipe matches the outer diameter of the secondary pipe.

[0014] Preferably, the lower end of the auxiliary pipe at the lowest position is tapered.

[0015] Beneficial effects: The utility model can simultaneously perform grouting on multiple layers of goaf areas distributed in the vertical direction, effectively accelerating the construction efficiency. At the same time, the utility model itself can be contracted in length, is convenient to transport and store, and has strong functionality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. Among them:

[0017] Figure 1 It is a practical application schematic diagram of the utility model;

[0018] Figure 2 It is an overall schematic diagram of the utility model;

[0019] Figure 3 It is a cross-sectional schematic diagram of the utility model;

[0020] Figure 4 It is a cross-sectional schematic diagram of the main pipe structure of the utility model;

[0021] Figure 5 It is an overall schematic diagram of the auxiliary pipe structure of the utility model.

[0022] In the figure: 1. main pipe; 2. auxiliary pipe; 3. slurry outlet hole; 4. limit slider; 5. strip slide; 6. ring slide; 7. nut; 8. reinforcement plate; 9. rubber protrusion. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the protection scope of the present invention.

[0024] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. The terms "connected" and "connection" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0025] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0026] Embodiment: This embodiment aims to provide a coal mine goaf grouting device, the main function of which is that it can simultaneously grout multiple layers of goaf distributed in the vertical direction, effectively improving the construction efficiency.

[0027] Reference Figure 2 , Figure 3 , Figure 4 and Figure 5 , including: a grouting pipe, which includes: a main pipe 1 and a sub-pipe 2, each of which is provided with three sections, and is mainly used for grouting operations in three layers of goaf areas distributed in the vertical direction. The staff should reasonably arrange the number of main pipes 1 and sub-pipes 2 according to the number of goaf areas, wherein each two adjacent sections of the main pipe 1 need to be connected by the sub-pipe 2, and a strip-shaped slurry outlet hole 3 is axially arranged on the pipe wall of the sub-pipe 2; two corresponding limit sliders 4 are radially protruded from the outside of both ends of the sub-pipe 2, and two corresponding strip-shaped slideways 5 are axially arranged inside the main pipe 1, and the strip-shaped slideways 5 matches the width of the limit slider 4, both ends of the strip slide 5 are connected with an annular slide 6, the annular slide 6 is adjacent to the end of the main pipe 1, the width of the annular slide 6 matches the thickness of the limit slider 4, the pipe mouth diameter of the main pipe 1 matches the outer diameter of the auxiliary pipe 2, thereby, the limit slider 4 can slide back and forth between the strip slide 5 and the annular slide 6, and the length of the grouting pipe can be changed by sliding the limit slider 4 in the strip slide 5, because in this way the auxiliary pipe 2 can be accommodated in the main pipe 1, so that the three main pipes 1 can be in end-to-end contact, thereby shortening the length of the grouting pipe as a whole.

[0028] When in use, slide the limit slider 4 from the strip slide 5 to the annular slide 6, and then rotate the main pipe 1 or the auxiliary pipe 2 to make the limit slider 4 slide along the annular slide 6. The limit slider 4 and the strip slide 5 are misaligned to fix the length of the grouting pipe. At this time, the limit slider 4 is in the annular slide 6, and the slurry outlet hole 3 on the auxiliary pipe 2 also corresponds to the goaf. It should be noted that during the production and processing of the main pipe 1 and the auxiliary pipe 2, the auxiliary pipe 2 of the same length can be processed according to the height of each layer of the goaf. In this way, the length of the slurry outlet hole 3 can be increased, thereby increasing the slurry outlet volume and improving the grouting efficiency. However, it is necessary to ensure that the main pipe 1 that is just in the soil layer or rock layer adjacent to the goaf can completely accommodate the auxiliary pipe 2.

[0029] Reference Figure 1 and Figure 2 The upper end of the uppermost section of the main pipe 1 is provided with an external thread to threadably fit a nut 7, and a reinforcing plate 8 is provided at the bottom of the nut 7. The reinforcing plate 8 is sleeved on the outside of the corresponding main pipe 1 so that the reinforcing plate 8 can cover the opening of the grouting hole. After the grouting is completed, the reinforcing plate can be tightened by screwing the nut 7 to make it in close contact with the ground surface, so as to ensure the stability of the grouting pipe through the reinforcing plate 8.

[0030] In this embodiment, refer to Figure 3 , Figure 4 and Figure 5 The upper and lower surfaces of the limit slider 4 are provided with rubber protrusions 9, which can increase the friction between the limit slider 4 and the inner wall of the annular slide 6, ensuring that the limit slider 4 will not be easily moved in the annular slide 6 by external force. In actual operation, because the strip slide 5 and the annular slide 6 are connected, when the limit slider 4 just enters the annular slide 6, it is best to rotate the limit slider 4 about 90°, so that even if the limit slider 4 accidentally moves in the annular slide 6 during use, it will not directly enter the strip slide 5.

[0031] In this embodiment, the lower end of the auxiliary pipe 2 at the lowest position is tapered. The purpose is to make the tapered pipe end easier to insert into the drilled hole. The design of the traditional grouting pipe head is continued here.

[0032] During the actual construction period, refer to Figure 1, the staff drills holes at the correct position above the multi-layer vertically arranged goafs. The drilled holes match the main pipe 1, and the multi-layer goafs are connected through the holes. Then the grouting pipe is adjusted. After fixing the length of the grouting pipe, its lower end is inserted into the drilled hole until it reaches the lowest goaf. At this time, the two main pipes 1 below the grouting pipe must be in the soil layer or rock layer of the adjacent goafs, and the three auxiliary pipes 2 of the grouting pipe just correspond to the three vertically arranged goafs. Finally, a reinforcing plate 8 is sleeved on the outside of the top main pipe 1 and a nut 7 is threadedly installed. After the grouting is completed, the nut 7 is screwed to fasten the reinforcing plate 8 to the surface, and the grouting pipe is retained inside the grouting hole. The roadbed above the goaf can be further reinforced through the grouting pipe.

[0033] The grouting device provided in this embodiment can simultaneously grout multiple layers of goaf areas distributed in a vertical direction, effectively speeding up the construction efficiency. At the same time, it can adjust its own length, is convenient for transportation and storage, and has strong functionality. In particular, the grouting pipe used for grouting operations in multiple layers of vertically arranged goaf areas is longer than that of ordinary grouting pipes, making storage and transportation more difficult. Therefore, this problem can be avoided to the greatest extent by using this grouting device.

[0034] It should be understood that the above description is merely exemplary and the embodiments of the present application do not limit this.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. A grouting device for coal mine goaf, characterized in that: include: A grouting pipe comprises: a main pipe and a sub-pipe, wherein the main pipe and the sub-pipe are both provided with multiple sections, and each two adjacent sections of the main pipe are connected by the sub-pipe, and a slurry outlet hole is provided on the pipe wall of the sub-pipe, and limiting sliders are radially protruding outside at both ends of the sub-pipe, and a strip slide is axially provided inside the main pipe, and both ends of the strip slide are connected to an annular slide, and the limiting slider slides between the strip slide and the annular slide, and the length of the grouting pipe is changed by sliding the limiting slider in the strip slide, and the length of the grouting pipe is fixed by sliding the limiting slider in the annular slide and being misaligned with the strip slide, and when the limiting slider is in the annular slide, the slurry outlet hole on the sub-pipe corresponds to the goaf.

2. The coal mine goaf grouting device according to claim 1, characterized in that: The upper end thread of the main pipe described in the uppermost section is fitted with a nut.

3. The coal mine goaf grouting device according to claim 2, characterized in that: A reinforcing plate is provided at the bottom of the nut, and the reinforcing plate is sleeved on the outside of the corresponding main pipe; The reinforcing plate covers the opening of the grouting hole, and the reinforcing plate is squeezed by the nut.

4. The coal mine goaf grouting device according to claim 1, characterized in that: The upper and lower surfaces of the limit sliding block are both provided with rubber protrusions.

5. The coal mine goaf grouting device according to claim 1, characterized in that: The width of the strip slideway matches the width of the limit sliding block.

6. The coal mine goaf grouting device according to claim 1, characterized in that: The width of the annular slideway matches the thickness of the limiting sliding block.

7. The coal mine goaf grouting device according to claim 1, characterized in that: The diameter of the pipe opening of the main pipe matches the outer diameter of the secondary pipe.

8. The coal mine goaf grouting device according to claim 1, characterized in that: The lower end of the auxiliary pipe at the lowest section is tapered.

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