A coal mine goaf filling and plugging device
By designing an adjustable-length filling pipe structure, the problem of difficulty in grouting and filling multi-layer goaf areas in one go was solved, achieving a highly efficient goaf sealing effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIAOZUO SHENLONG HYDROGEOLOGICAL ENG CO LTD
- Filing Date
- 2025-09-24
- Publication Date
- 2026-07-21
Smart Images
Figure CN224532777U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of goaf technology, and in particular to a coal mine goaf filling and sealing device. Background Technology
[0002] Goaf areas are "cavities" created below the surface by human excavation or natural geological movements. The existence of goaf areas poses a significant safety hazard to mine production, as personnel and machinery may fall into the goaf area and be injured.
[0003] Currently, some goaf areas are distributed in multiple layers in the vertical direction. When grouting and filling goaf areas, it is necessary to drill and grout multiple times for multiple goaf areas, which cannot be completed in one go, resulting in low construction efficiency and increased construction period.
[0004] Therefore, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Utility Model Content
[0005] The purpose of this application is to provide a coal mine goaf filling and sealing device to solve or alleviate the problem that it is difficult to completely fill multi-layer goaf with grout in one go.
[0006] To achieve the above objectives, this application provides the following technical solution:
[0007] This application provides a coal mine goaf filling and sealing device, comprising: a filling pipe vertically inserted into a borehole above the goaf, the filling pipe comprising: a top pipe, an intermediate pipe and a bottom pipe, the top pipe and the intermediate pipe being formed by connecting a fixed section and an extension section, the extension section of the top pipe extending into the fixed pipe of the intermediate pipe, the extension section of the intermediate pipe extending into the bottom pipe, the surface of the extension section and the lower end of the bottom pipe being provided with slurry outlets, and the slurry outlets on the surface of the extension section being located near the fixed section above, the exposed length of the extension section being adjustable to change the overall length of the filling pipe.
[0008] Preferably, the upper end of the fixed section of the jacking pipe is provided with a threaded section, which protrudes outward from the ground so that a nut can be fitted onto the outside of the threaded section;
[0009] The fixed sections of both the top pipe and the intermediate pipe have the same diameter as the bottom pipe.
[0010] Preferably, a limiting plate is sleeved on the upper end of the fixed section of the jacking pipe, and the limiting plate is fixed to the ground surface;
[0011] The limiting plate is located below the nut.
[0012] Preferably, a sealing plug is also fitted onto the upper outer side of the fixed section of the jacking pipe;
[0013] The bottom of the sealing plug narrows to extend into the borehole.
[0014] Preferably, the lower end of the bottom pipe is conical, and a slurry outlet is provided on the conical surface of the lower end of the bottom pipe.
[0015] Preferably, a pair of guide plates are symmetrically provided on the outside of the fixed section, and the guide plates are offset from the slurry outlet;
[0016] The guide plate is arranged along the axial direction of the filling tube;
[0017] The lower end of the guide plate is flush with the lower end of the fixed section.
[0018] Preferably, both the upper end of the fixed section of the intermediate tube and the upper end of the bottom tube have enlarged plates extending radially.
[0019] The upper plate of the enlarged plate is symmetrically provided with a pair of extension arms, which are arranged along the axial direction of the filling tube.
[0020] The extension arm consists of a pair of spaced-apart extension plates.
[0021] Preferably, the guide plate corresponds to the extension arm, and the guide plate is located between the two extension plates corresponding to the extension arm;
[0022] The spacing between two adjacent extension plates is the same as the thickness of the guide plate.
[0023] Preferably, both the guide plate and the extension plate have adjustment holes on their surfaces;
[0024] The relative positions of the guide plate and the extension plate are fixed by arc-shaped stirrups.
[0025] Preferably, the arc-shaped stirrup is fitted onto the outside of the fixed section so that the end of the arc-shaped stirrup passes through the adjustment hole that coincides between the guide plate and the extension plate and is fastened.
[0026] Compared with the closest prior art, the technical solution of this application has the following beneficial effects:
[0027] This application, based on a unique design, enables one-time grouting and filling of multi-layer goaf areas. Furthermore, this application can adjust its length to ensure that the grout outlet is within the goaf area, thus ensuring effective grouting and filling of the goaf. Attached Figure Description
[0028] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. Wherein:
[0029] Figure 1 This is a schematic diagram of the front view of this application;
[0030] Figure 2 This is a schematic diagram of the overall structure of this application;
[0031] Figure 3 This is an overall schematic diagram of the application during its use;
[0032] Figure 4 This is a schematic diagram illustrating the usage status of this application.
[0033] In the diagram: 1. Top pipe; 2. Intermediate pipe; 3. Bottom pipe; 4. Fixed section; 5. Extension section; 6. Grout outlet; 7. Nut; 8. Limiting plate; 9. Sealing plug; 10. Guide plate; 11. Enlarged plate; 12. Extension plate; 13. Adjustment hole; 14. Arc-shaped stirrup. Detailed Implementation
[0034] The present application will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation and not by way of limitation. In fact, those skilled in the art will recognize that modifications and variations can be made to the present application without departing from the scope or spirit thereof. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present application encompass such modifications and variations that fall within the scope of the appended claims and their equivalents.
[0035] In the following description, the terms "first / second / third" are used merely to distinguish similar objects and do not represent a specific order of objects. It is understood that "first / second / third" may be interchanged in a specific order or sequence where permitted, so that the embodiments of this application described herein can be implemented in an order other than that illustrated or described herein.
[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing embodiments of this disclosure only and is not intended to limit this disclosure.
[0037] In the description of this application, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and do not require that this application be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. The terms "connected," "linked," and "set up" used in this application should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; direct connections or indirect connections through intermediate components; wired connections, radio connections, or wireless communication signal connections. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.
[0038] This embodiment aims to provide a coal mine goaf filling and sealing device, whose main function is to achieve one-time grouting filling of multi-layer goaf areas, and to adjust its own length to change the position of the grout outlet, so as to ensure that the grouting outlet corresponds to the goaf area for effective grouting.
[0039] Reference Figures 1-4 A pre-drilled hole is made above the goaf to connect the three goaf layers. A filling pipe is vertically inserted into the hole. The filling pipe includes a top pipe 1, an intermediate pipe 2, and a bottom pipe 3. Both the top pipe 1 and the intermediate pipe 2 are welded together by fixed sections 4 and extension sections 5. The extension section 5 of the top pipe 1 extends into the fixed pipe of the intermediate pipe 2, and the extension section 5 of the intermediate pipe 2 extends into the bottom pipe 3. The fixed sections 4 of both the top pipe 1 and the intermediate pipe 2 have the same diameter as the bottom pipe 3. The upper outer surface of the fixed section 4 of the top pipe 1... A threaded section is provided, which protrudes outward from the ground. A nut 7 is threaded onto the outside of the threaded section to limit the descent of the entire filling tube. A limiting plate 8 is fitted on the upper end of the fixing section 4 of the jacking tube 1. The limiting plate 8 is fixed to the ground surface and can be fixed by screws (not shown in the figure). The limiting plate 8 is located below the nut 7. A sealing plug 9 is also fitted on the upper end of the fixing section 4 of the jacking tube 1. The bottom of the sealing plug 9 is narrowed to extend into the borehole opening to prevent slurry leakage.
[0040] In this embodiment, the lower end of the bottom pipe 3 is conical, and a slurry outlet 6 is provided on the conical surface of the lower end of the bottom pipe 3. Multiple slurry outlets 6 can be distributed around the bottom pipe 3.
[0041] Reference Figure 3 and Figure 4The exposed length of the extension section 5 can be adjusted to change the overall length of the filling tube. Specifically, a pair of guide plates 10 are symmetrically provided on the outside of the fixed section 4. The guide plates 10 are welded to the outside of the fixed section 4 along the axial direction of the filling tube, and the guide plates 10 are misaligned with the grout outlet 6 to avoid interference from the subsequent structures related to the guide plates 10 to the grout outlet 6 and affect its normal grouting. The lower end of the guide plate 10 is flush with the lower end of the fixed section 4 to ensure the effective guiding length of the guide plate 10.
[0042] Both the upper end of the fixed section 4 of the intermediate tube 2 and the upper end of the bottom tube 3 have annular enlarged plates 11 extending radially. The upper plate surface of the enlarged plate 11 is symmetrically provided with a pair of extension arms. The extension arms are arranged along the axial direction of the filling tube. The extension arms are composed of a pair of spaced extension plates 12. The extension plates 12 are welded to the enlarged plate 11. The guide plate 10 corresponds to the extension arm and is located between the two extension plates 12 of the corresponding extension arm, so that the extension arm is directionally displaced along the length direction of the guide plate 10. The spacing between two adjacent extension plates 12 is consistent with the thickness of the guide plate 10 to ensure stable displacement of the extension arm. The surfaces of the guide plate 10 and the extension plate 12 are evenly distributed with adjustment holes 13 along the length direction. The relative position of the guide plate 10 and the extension plate 12 is fixed by arc-shaped stirrups 14. The arc-shaped stirrups 14 are correspondingly sleeved on the outside of the fixed section 4 so that the end of the arc-shaped stirrups 14 passes through the adjustment holes 13 that coincide between the guide plate 10 and the extension plate 12, and then is fastened by screw sleeves.
[0043] In this example, the surface of the extension section 5 and the lower end of the bottom pipe 3 are both provided with slurry outlets 6, and the slurry outlets 6 on the surface of the extension section 5 are located near the upper fixed section 4 to expand the adjustable length range of the filling pipe, thereby ensuring that the slurry outlets 6 can be located in the goaf area.
[0044] In actual use, first drill holes to connect the various goaf areas. The diameter of the drill holes should not be less than the diameter of the annular enlarged plate 11. Adjust the length of the filling pipe according to the location of each goaf area so that the grout outlet 6 of the top pipe 1 and the intermediate pipe 2 are located in the upper and middle goaf areas. As for the grout outlet 6 of the bottom pipe 3, it is only necessary for the lower end of the bottom pipe 3 to extend into the air above the bottom goaf area, without going deep, to ensure that the grout can be injected into the bottom goaf area. After the filling pipe is lowered into the drill hole, finally install the sealing plug 9 and the limiting plate 8 in sequence on the upper end of the top pipe 1, and seal the drill hole opening with the sealing plug 9. Then fix the limiting plate 8 to the ground surface with screws to carry out the grouting and filling operation. After the goaf area is sealed, the filling pipe can be removed and reused or left directly in the soil layer as an anchor to reinforce the soil layer, depending on the actual situation.
[0045] The sealing device provided in this embodiment is designed to perform a one-time grouting and filling operation on multi-layer goaf areas, and can also adjust its length to ensure that the grout outlet 6 is within the goaf area, thus ensuring effective grouting and filling of the goaf area.
[0046] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A device for filling and sealing coal mine goaf, characterized in that, include: A filling pipe is vertically inserted into a borehole above the goaf. The filling pipe includes a top pipe, an intermediate pipe, and a bottom pipe. The top pipe and the intermediate pipe are both formed by connecting a fixed section and an extension section. The extension section of the top pipe extends into the fixed pipe of the intermediate pipe, and the extension section of the intermediate pipe extends into the bottom pipe. The surface of the extension section and the lower end of the bottom pipe are provided with slurry outlets, and the slurry outlets on the surface of the extension section are located near the fixed section above. The exposed length of the extension section can be adjusted to change the overall length of the filling pipe.
2. The coal mine goaf filling and sealing device according to claim 1, characterized in that, The upper end of the fixed section of the jacking pipe is provided with a threaded section, which protrudes outward from the ground so that a nut can be fitted onto the outside of the threaded section. The fixed sections of both the top pipe and the intermediate pipe have the same diameter as the bottom pipe.
3. The coal mine goaf filling and sealing device according to claim 2, characterized in that, A limiting plate is sleeved on the upper part of the fixed section of the jacking pipe, and the limiting plate is fixed to the ground surface; The limiting plate is located below the nut.
4. The coal mine goaf filling and sealing device according to claim 3, characterized in that, A sealing plug is also fitted on the outside of the upper end of the fixed section of the jacking pipe; The bottom of the sealing plug narrows to extend into the borehole.
5. The coal mine goaf filling and sealing device according to claim 1, characterized in that, The lower end of the bottom pipe is conical, and a slurry outlet is provided on the conical surface of the lower end of the bottom pipe.
6. The coal mine goaf filling and sealing device according to claim 1, characterized in that, A pair of guide plates are symmetrically provided on the outside of the fixed section, and the guide plates are offset from the slurry outlet. The guide plate is arranged along the axial direction of the filling tube; The lower end of the guide plate is flush with the lower end of the fixed section.
7. The coal mine goaf filling and sealing device according to claim 6, characterized in that, Both the upper end of the fixed section of the intermediate tube and the upper end of the bottom tube have enlarged plates extending radially. The upper plate of the enlarged plate is symmetrically provided with a pair of extension arms, which are arranged along the axial direction of the filling tube. The extension arm consists of a pair of spaced-apart extension plates.
8. The coal mine goaf filling and sealing device according to claim 7, characterized in that, The guide plate corresponds to the extension arm, and the guide plate is located between the two extension plates corresponding to the extension arm; The spacing between two adjacent extension plates is the same as the thickness of the guide plate.
9. The coal mine goaf filling and sealing device according to claim 8, characterized in that, The surfaces of both the guide plate and the extension plate are provided with adjustment holes; The relative positions of the guide plate and the extension plate are fixed by arc-shaped stirrups.
10. The coal mine goaf filling and sealing device according to claim 9, characterized in that, The arc-shaped stirrups are fitted onto the outside of the fixed section so that the ends of the arc-shaped stirrups pass through the adjustment holes that coincide between the guide plate and the extension plate and are fastened.