A grouting device for water channel in coal seam roof fissure development area of coal mine

Abstract

This utility model discloses a grouting device for water-conducting channels in the fractured zone of a coal seam roof in a coal mine, belonging to the field of coal mine water control drilling construction. It includes a grouting steel pipe with a material replenishment assembly inside. The assembly includes an upper control valve, a lower control valve, and a closing valve plate. The upper and lower control valves are installed on the side wall of the grouting steel pipe, and the closing valve plate is located inside the pipe corresponding to the upper and lower control valves. The outer diameter of the closing valve plate is matched to the inner diameter of the grouting steel pipe. In use, the upper and lower control valves control the closing valve plate, effectively controlling the addition of grouting material and preventing cement slurry from spraying out. This allows for adjustment of the grout mix ratio during grouting operations, greatly reducing material waste and effectively improving the grouting sealing effect.

Description

Technical Field

[0001] This utility model relates to the field of drilling construction for water control in coal mines, specifically a grouting device for water-conducting channels in the fractured area of ​​the coal seam roof. Background Technology

[0002] The mining of coal mine working faces often leads to the destruction and deformation of the overlying strata, resulting in the local development of water-conducting fissures in the roof that penetrate into the aquifer. Water from the aquifer has seeped into the working face of the mining area and, as the mining face continues to advance, gradually becomes the main source of mine water inflow.

[0003] Currently, when grouting cracks, the mixing ratio of the grouting material cannot be effectively adjusted due to the influence of grouting equipment and grouting pressure. This leads to material waste and poor grouting sealing effect. Therefore, this utility model provides a grouting device for water guiding channels in the crack development zone of coal seam roof in coal mines to solve the above-mentioned problems. Utility Model Content

[0004] The purpose of this invention is to provide a grouting device for water-conducting channels in the fractured zone of the coal seam roof in coal mines, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A grouting device for a water-conducting channel in a fractured area of ​​a coal seam roof in a coal mine includes a grouting steel pipe. A feeding assembly is installed inside the grouting steel pipe. The feeding assembly includes an upper control valve, a lower control valve, and a closing valve plate. The upper and lower control valves are both installed on the side wall of the grouting steel pipe. The closing valve plate is located inside the grouting steel pipe corresponding to the positions of the upper and lower control valves. The outer diameter of the closing valve plate is adapted to the inner diameter of the grouting steel pipe, and the corresponding closing valve plate is connected to the control ends of the upper and lower control valves. Two sets of closing valve plates are spaced apart inside the grouting steel pipe, and the area between the two sets of closing valve plates is the feeding area.

[0007] As a further embodiment of this utility model, the feeding assembly also includes an adjusting component that can drive the upper control valve to adjust the height on the grouting steel pipe.

[0008] As a further embodiment of this utility model, the adjusting component includes an adjusting groove, a lifting plate, and a lifting groove. The adjusting groove is formed on the side wall of the grouting steel pipe and penetrates the corresponding position wall surface of the grouting steel pipe, communicating with the interior of the grouting steel pipe.

[0009] As a further embodiment of this utility model, the lifting groove is opened in the side wall of the grouting steel pipe at the position corresponding to the adjustment groove, the lifting groove passes through the corresponding wall surface of the grouting steel pipe and communicates with the interior of the adjustment groove, and the lifting plate is set inside the lifting groove.

[0010] As a further embodiment of this utility model, the feeding assembly also includes a blocking member capable of restricting the dynamic adjustment of the adjusting member, the blocking member being installed on the side wall of the grouting steel pipe at the position corresponding to the adjusting member.

[0011] As a further embodiment of this utility model, the blocking component includes a fixed ring, a rotary ring groove, a blocking ring, and a through port. The fixed ring is fixedly installed at intervals on the side wall of the grouting steel pipe. The through port is opened on the fixed ring at the position corresponding to the adjusting component. The rotary ring groove is opened on the outer side wall of the fixed ring. The blocking ring is movably installed inside the rotary ring groove.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. When this utility model is used, the upper and lower control valves are set up to adapt and control the closed valve plate, thereby effectively controlling the addition of grouting material and preventing cement grout from spraying out. This allows for the adjustment of the grouting material mix ratio during grouting operations, greatly reducing material waste and effectively improving the grouting and sealing effect.

[0014] 2. When this utility model is used, the adjusting component can drive the upper control valve to adjust the height of the grouting steel pipe, thereby changing the size of the material replenishment area and making the size of the material replenishment area in a suitable position. This can effectively avoid the occurrence of secondary material replenishment due to insufficient material replenishment and greatly reduce the occurrence of frequent operations.

[0015] 3. When this utility model is used, the adjusting component can drive the upper control valve to dynamically adjust the lifting and lowering of the grouting steel pipe, so that the spatial position and volume of the material replenishment area change. This dynamically expands the activity path and contact area of ​​the grouting material as it enters the cement slurry, increasing the mixing opportunity between the material and the cement slurry, thereby improving the mixing effect of the grouting material and the cement slurry.

[0016] 4. When this utility model is in use, the blocking component can selectively block the adjustment of the adjusting component, so that the appropriate adjustment method can be selected according to the usage requirements, which greatly improves the applicability of the device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a grouting device for a water-conducting channel in a coal seam roof fissure development zone.

[0018] Figure 2This is a partial cross-sectional schematic diagram of the grouting steel pipe in a grouting device for a water-conducting channel in a coal seam roof fissure development zone in a coal mine.

[0019] Figure 3 This is a schematic diagram of the overall structure of a grouting device for a water channel in a coal seam roof fissure development zone, according to Embodiment 2.

[0020] Figure 4 This is a partial cross-sectional schematic diagram of the adjusting component in Embodiment 2 of a grouting device for a water-conducting channel in a coal seam roof fracture development zone in a coal mine.

[0021] Figure 5 This is a schematic diagram of the overall structure of a grouting device for a water-conducting channel in a coal seam roof fissure development zone, according to Embodiment 3.

[0022] Figure 6 This is a partial cross-sectional view of the blocking component in a third embodiment of a grouting device for a water-conducting channel in a coal seam roof fissure development zone.

[0023] In the diagram: 1. Grouting steel pipe; 2. Upper control valve; 3. Lower control valve; 4. Sealing valve plate; 5. Adjusting groove; 6. Lifting plate; 7. Lifting groove; 8. Fixing ring; 9. Rotary ring groove; 10. Blocking ring; 11. Through port; 12. Auxiliary push block. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1:

[0026] Please see Figures 1-2 In this embodiment of the utility model, a grouting device for a water channel in the fractured area of ​​a coal seam roof in a coal mine includes a grouting steel pipe 1. The pressure resistance of the grouting steel pipe 1 is required to be no less than the design pressure resistance. The material of the grouting steel pipe 1 includes, but is not limited to, stainless steel. The inner diameter of the grouting steel pipe 1 is determined by the particle diameter of the grouting material to be added. A feeding component is provided inside the grouting steel pipe 1. The grouting steel pipe 1 is installed on the gate valve used at the borehole opening by welding.

[0027] The material replenishment assembly includes an upper control valve 2, a lower control valve 3, and a closing valve plate 4. The upper control valve 2 and the lower control valve 3 are both installed on the side wall of the grouting steel pipe 1. The closing valve plate 4 is set inside the grouting steel pipe 1 at the position corresponding to the upper control valve 2 and the lower control valve 3. The outer diameter of the closing valve plate 4 is adapted to the inner diameter of the grouting steel pipe 1, and the closing valve plate 4 at the corresponding position is connected to the control end of the upper control valve 2 and the lower control valve 3. The rotation of the upper control valve 2 and the lower control valve 3 can drive the closing valve plate 4 at the corresponding position to rotate inside the grouting steel pipe 1, so that the closing valve plate 4 can adjust the grouting steel pipe 1 to close and open inside the grouting steel pipe 1. The two sets of closing valve plates 4 are arranged alternately inside the grouting steel pipe 1, and the area between the two sets of closing valve plates 4 is the material replenishment area.

[0028] By adjusting the upper control valve 2, the upper control valve 2 drives the sealing valve plate 4 above it to open. At the same time, the lower control valve 3 is not adjusted, so the sealing valve plate 4 above it is closed. After the grouting material is mixed, it is placed in the feeding area. The upper control valve 2 is adjusted again, so that the upper control valve 2 drives the sealing valve plate 4 above it to close. At the same time, the lower control valve 3 is adjusted, so that the lower control valve 3 drives the sealing valve plate 4 above it to open. This allows the grouting material and cement slurry in the feeding area to mix. The upper control valve 2 and the lower control valve 3, which are set up at the top and bottom respectively, can effectively control the addition of grouting material and prevent cement slurry from spraying out.

[0029] Example 2:

[0030] like Figures 3-4 As shown, based on Embodiment 1, the material replenishment assembly also includes an adjusting component. The adjusting component is set on the side wall of the grouting steel pipe 1 at the position corresponding to the upper control valve 2. The upper control valve 2 and the corresponding closed valve plate 4 are both installed on the adjusting component. The adjusting component can drive the upper control valve 2 to be raised and lowered on the grouting steel pipe 1, thereby changing the size of the material replenishment area. At the same time, the spatial position and volume of the material replenishment area can also be changed by means of dynamic adjustment, so that the activity path and contact area of ​​the grouting material are dynamically expanded during the process of entering the cement slurry, increasing the mixing opportunity between the material and the cement slurry, thereby improving the mixing effect of the grouting material and the cement slurry.

[0031] The adjusting component includes an adjusting groove 5, a lifting plate 6, and a lifting groove 7. The adjusting groove 5 is opened on the side wall of the grouting steel pipe 1. The adjusting groove 5 penetrates the corresponding position of the wall surface of the grouting steel pipe 1 and communicates with the interior of the grouting steel pipe 1. The lifting groove 7 is opened in the side wall of the grouting steel pipe 1 at the position corresponding to the adjusting groove 5. The lifting groove 7 penetrates the corresponding position of the wall surface of the grouting steel pipe 1 and communicates with the interior of the adjusting groove 5. The lifting plate 6 is set inside the lifting groove 7 and can be adjusted in height inside the lifting groove 7.

[0032] Specifically, the length of the adjusting groove 5 (i.e., the length from the bottom to the top of the inner side of the adjusting groove 5) is no more than one-third of the length of the lifting groove 7, and the length of the lifting plate 6 is no less than two-thirds of the length of the lifting groove 7. The adjusting groove 5 is located in the middle of the lifting groove 7, and the upper control valve 2 and the corresponding sealing valve plate 4 are installed in the middle of the lifting plate 6. The specific lengths of the adjusting groove 5, the lifting plate 6, and the lifting groove 7 are adapted to the usage requirements. By setting the length of the lifting plate 6, the lifting plate 6 can move inside the lifting groove 7, which can replace the original sealing effect of the side wall and avoid leakage in the filling area inside the grouting steel pipe 1 during lifting and adjustment.

[0033] Example 3:

[0034] like Figures 5-6 As shown, based on Embodiment 2, the feeding assembly also includes a blocking component that can limit the dynamic adjustment of the adjusting component. The blocking component is installed on the side wall of the grouting steel pipe 1 at the position corresponding to the adjusting component. The blocking component can limit the movement of the upper control valve 2 by snap-fit ​​limiting, thereby limiting the adjustment of the adjusting component.

[0035] The blocking component includes a fixed ring 8, a rotary ring groove 9, a blocking ring 10, and a through-hole 11. The fixed ring 8 is circular and is fixedly installed at intervals on the side wall of the grouting steel pipe 1. The through-hole 11 is opened on the fixed ring 8 corresponding to the position of the adjusting component, and the size of the through-hole 11 is adapted to the size of the adjusting component. The rotary ring groove 9 is opened on the outer side wall of the fixed ring 8, and the rotary ring groove 9 and the through-hole 11 are interconnected. The blocking ring 10 is installed inside the rotary ring groove 9, and the size of the blocking ring 10 is adapted to the size of the inner side of the rotary ring groove 9, so that the blocking ring 10 can rotate inside the rotary ring groove 9.

[0036] When the blocking ring 10 rotates inside the adjusting ring groove 9 until the middle of the blocking ring 10 corresponds to the adjusting member, the blocking member is in a blocking state, and the blocking ring 10 will block the upper control valve 2, thereby restricting the movement of the upper control valve 2.

[0037] When the blocking ring 10 rotates inside the rotary ring groove 9 until the blocking ring 10 is completely aligned with the rotary ring groove 9, the blocking component is in the open state. The blocking ring 10 will not block the upper control valve 2, and the upper control valve 2 can be adjusted up and down on the grouting steel pipe 1 by the adjusting component.

[0038] The blocking component also includes an auxiliary push block 12 installed on the blocking ring 10, which can assist in rotating and adjusting the blocking ring 10.

[0039] The working principle of this utility model is as follows:

[0040] When using this invention, after drilling is completed and before grouting begins, the device is welded and installed onto a large gate valve at the borehole opening. During grouting, when large-particle grouting material needs to be added, the upper control valve 2 is adjusted to open the corresponding closed valve plate 4, while the closed valve plate 4 on the lower control valve 3 remains closed. The grouting material is added to the replenishment area in proportion. The upper control valve 2 is then adjusted to close the corresponding closed valve plate 4, and the lower control valve 3 is adjusted to open the corresponding closed valve plate 4, allowing the large-particle grouting material to smoothly flow into the cement grout, thus completing the replenishment of grouting material during the grouting process.

[0041] When adding grouting material, the adjusting component can effectively drive the upper control valve 2 and the closing valve plate 4 on the upper control valve 2 to the designated position, thereby ensuring that the size of the replenishment area is appropriate. This effectively avoids the need for secondary replenishment due to insufficient replenishment. At the same time, the adjusting component can drive the upper control valve 2 and the closing valve plate 4 on the upper control valve 2 to adjust their height on the grouting steel pipe 1. When the upper control valve 2 drives the closing valve plate 4 to close, and the lower control valve 3 drives the closing valve plate 4 to open, the closing valve plate 4 on the upper control valve 2 will adjust its height according to the grouting pressure, thereby adjusting the size of the corresponding replenishment area. This effectively changes the activity area of ​​the grouting material, reducing the occurrence of grouting material agglomeration and effectively assisting the grouting material in mixing into the cement slurry.

[0042] By adjusting the blocking component, the upper control valve 2 and the upper closed valve plate 4 can be effectively limited, preventing the adjusting component from adjusting. At this time, after the upper control valve 2 and the upper closed valve plate 4 have been adjusted in the feeding area, they will not be adjusted to adapt to pressure changes, thereby improving their compressive strength. At the same time, the blocking component can also be left unadjusted, so that the upper control valve 2 and the upper closed valve plate 4 will not be limited, thus allowing dynamic adjustment with pressure changes. This improves the efficiency of mixing grouting materials and cement slurry at low pressures. According to actual usage requirements, the appropriate mode can be selected.

[0043] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A grouting device for a water-conducting channel in a fractured zone of a coal seam roof in a coal mine, comprising a grouting steel pipe (1), wherein a feeding assembly is provided inside the grouting steel pipe (1), characterized in that: The feeding assembly includes an upper control valve (2), a lower control valve (3), and a closing valve plate (4). The upper control valve (2) and the lower control valve (3) are both installed on the side wall of the grouting steel pipe (1). The closing valve plate (4) is set inside the grouting steel pipe (1) at the position corresponding to the upper control valve (2) and the lower control valve (3). The outer diameter of the closing valve plate (4) is adapted to the inner diameter of the grouting steel pipe (1), and the closing valve plate (4) at the corresponding position is connected to the control end of the upper control valve (2) and the lower control valve (3). The two sets of closing valve plates (4) inside the grouting steel pipe (1) are spaced apart from each other, and the area between the two sets of closing valve plates (4) is the feeding area.

2. The grouting device for water-conducting channels in the fractured zone of a coal seam roof as described in claim 1, characterized in that: The feeding assembly also includes an adjusting component that can drive the upper control valve (2) to adjust the height on the grouting steel pipe (1).

3. A grouting device for water-conducting channels in the fractured zone of a coal seam roof as described in claim 2, characterized in that: The adjusting component includes an adjusting groove (5), a lifting plate (6), and a lifting groove (7). The adjusting groove (5) is opened on the side wall of the grouting steel pipe (1). The adjusting groove (5) penetrates the corresponding wall surface of the grouting steel pipe (1) and communicates with the interior of the grouting steel pipe (1).

4. A grouting device for water-conducting channels in the fractured zone of a coal seam roof as described in claim 3, characterized in that: The lifting groove (7) is opened in the side wall of the grouting steel pipe (1) at the position corresponding to the adjustment groove (5). The lifting groove (7) penetrates the wall of the grouting steel pipe (1) at the corresponding position and communicates with the interior of the adjustment groove (5). The lifting plate (6) is set inside the lifting groove (7).

5. A grouting device for water-conducting channels in the fractured zone of a coal seam roof as described in claim 2, characterized in that: The feeding assembly also includes a blocking component that can limit the dynamic adjustment of the adjusting component. The blocking component is installed on the side wall of the grouting steel pipe (1) at the position corresponding to the adjusting component.

6. A grouting device for water-conducting channels in the fractured zone of a coal seam roof as described in claim 5, characterized in that: The blocking component includes a fixed ring (8), a rotary ring groove (9), a blocking ring (10), and a through-hole (11). The fixed ring (8) is fixedly installed at intervals on the side wall of the grouting steel pipe (1). The through-hole (11) is opened on the fixed ring (8) at the position corresponding to the adjusting component. The rotary ring groove (9) is opened on the outer side wall of the fixed ring (8). The blocking ring (10) is movably installed inside the rotary ring groove (9).

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