Grouting reinforcement device for thick unconsolidated formation of underground coal mine
By designing a grouting reinforcement device that includes a crushing roller and a screen plate, the problem of grouting pipe blockage caused by lumpy debris in the grout was solved, thereby improving grouting efficiency and ensuring the safety of coal mine production.
Patent Information
- Application Number
- CN202520844960.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-29
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-04-29
AI Technical Summary
Existing coal seam grouting reinforcement devices are prone to clogging of grouting pipes due to excessively large particle size or insufficiently mixed grout, which affects grouting efficiency and consequently impacts coal mine production safety.
A grouting reinforcement device including a trolley, storage tank, suction pump and grouting pipe was designed. The device pre-treats lumpy impurities in the grout through structures such as crushing rollers and screen plates to reduce the risk of clogging, and realizes intelligent control through a controller.
It effectively reduces grouting pipe blockage, improves grouting efficiency, ensures coal mine production safety, reduces labor intensity, and meets the requirements of modern mining development.
Smart Images
Figure CN223894154U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of coal mine grouting reinforcement technology, specifically to a grouting reinforcement device for thick loose layers in underground coal mines. Background Technology
[0002] During coal mining, underground excavation causes stress redistribution in the surrounding rock strata, potentially leading to surface subsidence, roof collapse, or spalling. Thick, loose layers, due to their loose structure and poor load-bearing capacity, are prone to collapse during mining, affecting mine stability and threatening the lives and safety of miners. Grouting reinforcement of thick, loose layers is a key technical measure to ensure underground safety and control environmental damage in coal mining. It involves injecting materials and grout to fill and seal underground pores and cracks, thereby preventing the leakage and diffusion of mine water, gas, and coal seam gas. By improving the mechanical properties and hydrological conditions of the formation, it provides necessary geological guarantees for efficient and safe mining.
[0003] However, existing coal seam grouting reinforcement devices have certain drawbacks in use. If the grouting material (such as cement, fly ash, aggregate, etc.) has too large a particle size, or if the grout is not fully mixed, large particles of debris will accumulate at bends and diameter changes in the grouting pipe, causing physical blockages. Alternatively, if an excessive amount of quick-setting agent is added, the grout will solidify prematurely. At the same time, solid particles in the grout will settle due to gravity during transportation, forming large-particle lumps such as "mud cakes." All of these can lead to blockages at the grouting port of the grouting pipe, ultimately preventing the grout from being injected smoothly, affecting grouting efficiency, and ultimately impacting coal mine production operations.
[0004] Therefore, this utility model proposes a grouting reinforcement device for thick loose layers in underground coal mines. Utility Model Content
[0005] The purpose of this invention is to provide a grouting reinforcement device for thick loose layers in coal mines. This grouting reinforcement device can reduce the occurrence of grouting pipe blockage and effectively improve grouting efficiency.
[0006] To achieve the above objectives, this utility model adopts the following technical solution:
[0007] A grouting reinforcement device for thick loose layers in underground coal mines includes a trolley, a storage tank, a suction pump, and a grouting pipe;
[0008] The trolley is equipped with a storage box and a suction pump on its top.
[0009] The storage box includes an upper shell, a middle shell, and a lower shell arranged from top to bottom. The upper shell has a feed inlet at the top, and the middle shell has a crushing roller inside. The end of the crushing roller is equipped with a drive motor.
[0010] A discharge port is provided on one side wall of the lower shell, and the discharge port is connected to the inlet end of the suction pump. The outlet end of the suction pump is connected to the grouting pipe, and the grouting pipe has multiple grouting holes.
[0011] Preferably, the upper shell has multiple straight rods horizontally arranged inside, and two sets of crushing blades are arranged above the straight rods. The two sets of crushing blades are arranged opposite each other, and each set of crushing blades is equipped with an electric push rod, which can drive the crushing blades to move laterally.
[0012] Preferably, the lower housing is provided with a sieve plate, which is arranged at an angle and has multiple sieve holes evenly distributed on it.
[0013] Preferably, a guide plate is provided inside the lower housing and below the sieve plate, and the guide plate is inclined.
[0014] Preferably, the trolley is also equipped with a controller, wherein the control terminals of the drive motor, electric push rod and suction pump are all connected to the controller via signal cables.
[0015] Preferably, the blade of the crusher is serrated.
[0016] Preferably, a waste outlet is provided on the other side wall of the lower housing.
[0017] Preferably, two converging plates are provided inside the middle shell and above the crushing roller, and the two converging plates are arranged in an inclined and symmetrical manner.
[0018] Preferably, the corners of the bottom of the trolley are equipped with rollers.
[0019] Preferably, the trolley is provided with a handle on the top.
[0020] The beneficial effects of this utility model are as follows:
[0021] This utility model proposes a grouting reinforcement device for thick loose layers in coal mines. The device injects grout into the inlet of its storage tank. Larger lumpy debris in the grout is intercepted by a straight rod, then crushed by two sets of crushing blades before falling into the middle shell. Smaller lumpy debris is further crushed by crushing rollers and falls into the lower shell. Incompletely crushed lumpy debris is intercepted by a screen plate, which workers can clean up promptly through a waste outlet on one side. The grout falls through the screen holes onto an inclined guide plate below, and is then pumped by a suction pump to the grouting pipe for grouting operations. This grouting reinforcement device effectively reduces grouting pipe blockage, significantly improves grouting efficiency, and ensures safe production operations in coal mines.
[0022] This utility model grouting reinforcement device has a high degree of intelligence. By configuring a controller on the trolley, the staff can control the grouting reinforcement device as a whole, which not only effectively improves work efficiency but also reduces the workload of the staff and saves certain labor costs, which meets the development requirements of modern mining. Attached Figure Description
[0023] Figure 1 This is a perspective view of the present utility model;
[0024] Figure 2 This is the front view of the present invention;
[0025] Figure 3 This is a side view of the present invention;
[0026] Figure 4 This is a schematic diagram of the internal structure of the upper shell of the storage box of this utility model;
[0027] Figure 5 This is a schematic diagram of the internal structure of the middle shell of the storage box of this utility model;
[0028] Figure 6 This is a schematic diagram of the internal structure of the lower shell of the storage box of this utility model. Figure 1 ;
[0029] Figure 7 This is a schematic diagram of the internal structure of the lower shell of the storage box of this utility model. Figure 2 ;
[0030] Figure 8 This is a schematic diagram of the structure of the guide plate of this utility model;
[0031] Among them, 1-trolley; 11-roller; 12-handle; 13-controller;
[0032] 2-Storage box:
[0033] 21-Upper shell: 210-Feed inlet, 211-Straight rod, 212-Crushing blade, 213-Electric push rod;
[0034] 22-Middle layer box shell: 221-Converging plate, 222-Drive motor, 223-Crushing roller;
[0035] 23-Lower shell: 230-Discharge port, 231-Screen plate, 232-Guide plate;
[0036] 3-Suction pump, 4-Grouting pipe. Detailed Implementation
[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0038] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0039] Combination Figures 1 to 8 As shown, this utility model proposes a grouting reinforcement device for thick loose layers in coal mines. This grouting reinforcement device can effectively reduce the occurrence of blockage in the grouting pipe 4, effectively improve the grouting efficiency, and ensure safe production operations in coal mines. The grouting reinforcement device mainly includes structural components such as a trolley 1, a storage tank 2, a suction pump 3, and a grouting pipe 4.
[0040] Combination Figures 1 to 3 As shown, rollers 11 are provided at the corners of the bottom of the trolley 1, and a handle 12 is provided on one side of the top of the trolley 1 to facilitate the movement of the grouting reinforcement device by the staff, which effectively improves the work efficiency.
[0041] Combination Figures 1 to 3 As shown, the top of the trolley 1 is equipped with a storage tank 2 and a suction pump 3. The storage tank 2 is used to temporarily store the grout used for grouting, and the suction pump 3 provides power to draw the grout from the storage tank 2 into the grouting pipe 4.
[0042] Combination Figures 4 to 7 As shown, the storage box 2 has a three-layer structure, mainly consisting of an upper shell 21, a middle shell 22, and a lower shell 23 arranged sequentially from top to bottom. Among these, combined with... Figure 1 As shown, an inlet 210 is provided at the top of the upper shell 21, through which the slurry enters the interior of the storage tank 2.
[0043] Combination Figure 4As shown, multiple straight rods 211 are horizontally arranged inside the upper shell 21, with gaps between them to allow the slurry to flow smoothly into the middle shell 22. Two sets of crushing blades 212 are positioned above the straight rods 211, facing each other. Each set of crushing blades 212 is equipped with an electric push rod 213. The cylinder end of the electric push rod 213 is connected to the side wall of the upper shell 21, and the telescopic end is connected to the handle end of the crushing blade 212. The electric push rod 213 can drive the crushing blade 212 to move laterally, thus crushing lumpy impurities in the slurry.
[0044] Combination Figure 4 As shown, the blades of the crusher 212 are serrated, and the serrated blades of the two crushers 212 are staggered, which makes the crushing of large block polymers more efficient. When large debris is intercepted by the straight rod 211, power is provided by the electric push rod 213, and the large debris is crushed by the two sets of crushers 212, and then falls into the middle shell 22 through the gap between the adjacent straight rods 211.
[0045] Combination Figure 5 As shown, the middle shell 22 is equipped with two sets of crushing rollers 223. The ends of the two sets of crushing rollers 223 are equipped with drive motors 222. The drive motors 222 provide power to drive the crushing rollers 223 to rotate, and crush the blocky debris again to reduce the probability of clogging of the grouting pipe 4.
[0046] Combination Figure 5 As shown, two converging plates 221 are provided inside the middle shell 22 and above the crushing roller 223. The two converging plates 221 are arranged in an inclined and symmetrical manner. The slurry from the upper shell 21 falls along the converging plates 221 into the middle of the two sets of crushing rollers 223, which can further crush the blocky debris that has not been fully crushed, thereby further reducing the probability of clogging of the grouting pipe 4.
[0047] Combination Figure 6 As shown, the lower shell 23 is equipped with a sieve plate 231. The sieve plate 231 is arranged at an angle and has multiple sieve holes evenly distributed on it. Uncrushed blocky debris will be intercepted by the sieve plate 231, while the slurry can pass smoothly through the sieve holes and fall below.
[0048] Combination Figure 3 As shown, a waste outlet is provided on the other side wall of the lower shell 23, through which staff can conveniently and efficiently clean up debris.
[0049] Combination Figure 7 and Figure 8As shown, a guide plate 232 is provided inside the lower shell 23 and below the screen plate 231. The guide plate 232 is inclined, and a discharge port 230 is opened on one side wall of the lower shell 23. The slurry that has been crushed and screened flows out smoothly from the discharge port 230.
[0050] Combination Figure 1 and Figure 2 As shown, the discharge port 210 is connected to the inlet end of the suction pump 3, and the discharge end of the suction pump 3 is connected to the grouting pipe 4. The grouting pipe 4 has multiple grouting holes. The suction pump provides power to draw the grout inside the storage tank 2 into the grouting pipe 4 for grouting operations.
[0051] Combination Figure 1 As shown, the trolley 1 is also equipped with a controller 13, in which the control terminals of the drive motor 222, electric push rod 213, and suction pump 3 are all connected to the controller 13 via signal cables. By configuring the controller 13, the staff can achieve overall control of the grouting reinforcement device, which effectively improves work efficiency, reduces the workload of the staff, saves certain labor costs, and meets the development requirements of modern mining.
[0052] Combination Figures 1 to 8 As shown, this utility model proposes a grouting reinforcement device for thick loose layers in coal mines. The device injects grout into the inlet 210 of its storage tank 2. Large lumpy debris in the grout is intercepted by a straight rod 211, then crushed by two sets of crushing blades 212 before falling into the middle shell 22. Smaller lumpy debris is further crushed by crushing rollers 223 before falling into the lower shell 23. Uncrushed debris is intercepted by a screen plate 231, which workers can clean up promptly through a waste outlet on one side. The grout falls through the screen holes onto an inclined guide plate 232 below, and is then pumped by a suction pump 3 to the grouting pipe 4 for grouting operations. This grouting reinforcement device crushes lumpy debris in the grout through multiple methods, effectively reducing the risk of blockage in the grouting pipe 4, improving grouting efficiency, and ensuring safe production operations in coal mines.
[0053] Of course, the above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model and should be protected by the present utility model.
Claims
1. A grouting reinforcement device for thick loose layers in underground coal mines, characterized in that, Includes a trolley, storage tank, suction pump, and grouting pipe; The trolley is equipped with a storage box and a suction pump on its top. The storage box includes an upper shell, a middle shell, and a lower shell arranged from top to bottom. The upper shell has a feed inlet at the top, and the middle shell has a crushing roller inside. The end of the crushing roller is equipped with a drive motor. A discharge port is provided on one side wall of the lower shell, and the discharge port is connected to the inlet end of the suction pump. The outlet end of the suction pump is connected to the grouting pipe, and the grouting pipe has multiple grouting holes.
2. The grouting reinforcement device for thick loose layers in underground coal mines according to claim 1, characterized in that, The upper shell has multiple straight rods horizontally arranged inside. Two sets of crushing blades are arranged above the straight rods. The two sets of crushing blades are arranged opposite each other, and each set of crushing blades is equipped with an electric push rod, which can drive the crushing blades to move laterally.
3. The grouting reinforcement device for thick loose layers in underground coal mines according to claim 1, characterized in that, The lower shell is equipped with a sieve plate, which is arranged at an angle and has multiple sieve holes evenly distributed on it.
4. The grouting reinforcement device for thick loose layers in underground coal mines according to claim 3, characterized in that, A guide plate is installed inside the lower casing and below the sieve plate, and the guide plate is inclined.
5. The grouting reinforcement device for thick loose layers in underground coal mines according to claim 2, characterized in that, The trolley is also equipped with a controller, wherein the control terminals of the drive motor, electric push rod and suction pump are all connected to the controller via signal cables.
6. The grouting reinforcement device for thick loose layers in underground coal mines according to claim 2, characterized in that, The blade of the crusher is serrated.
7. The grouting reinforcement device for thick loose layers in underground coal mines according to claim 1, characterized in that, The lower casing has a waste outlet on its other side wall.
8. The grouting reinforcement device for thick loose layers in underground coal mines according to claim 1, characterized in that, Inside the middle shell and above the crushing roller, there are two converging plates arranged in an inclined and symmetrical manner.
9. The grouting reinforcement device for thick loose layers in underground coal mines according to claim 1, characterized in that, The corners of the bottom of the trolley are all equipped with rollers.
10. The grouting reinforcement device for thick loose layers in underground coal mines according to claim 1, characterized in that, The trolley is equipped with a handle on top.