Reusable underground goaf filling hole sleeve

Abstract

The utility model discloses a reusable underground goaf filling hole casing pipe which comprises a filling hole dug in an upper rock mass of an underground goaf and a casing pipe penetrating through the filling hole, a rubber sleeve is arranged outside the casing pipe, the two ends of the rubber sleeve are fixedly connected with the casing pipe, an air cavity is formed between the rubber sleeve and the casing pipe, and the air cavity is communicated with the filling hole. A ventilation component is arranged on the sleeve or the rubber sleeve in a penetrating mode, one end of the ventilation component is arranged in the air cavity, the other end of the ventilation component is arranged on the contactable outer portion, and the ventilation component is a valve core. The rubber sleeve is arranged outside the filling sleeve, the air cavity with the variable size is formed between the rubber sleeve and the sleeve, expansion and retraction of the rubber sleeve are driven by the air cavity, filling of a gap between the sleeve and a filling hole and rapid recovery of the sleeve are achieved, and the device has the advantages of being simple in structure, high in operation convenience, high in filling efficiency, capable of being repeatedly used, low in cost and the like. And the mining cost can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of underground goaf processing, and particularly relates to a reusable underground goaf filling hole casing. Background Art

[0002] In the mining industry, in order to improve the safety of the mining process, it is usually necessary to treat the goaf, especially the goaf formed during underground mineral mining. The filling process accounts for a large proportion of the existing goaf treatment methods. The filling process refers to the process of introducing the filling slurry into the goaf by laying a filling pipeline to achieve filling. Due to the complex conditions of the mining area and ore body, the laying and installation process of the filling pipeline will also encounter various problems, which often leads to the inability to effectively recycle the laid filling pipeline, especially the pipeline at the feed port when filling the underground goaf. There are generally two ways to lay out the feed port of the filling pipeline in the existing goaf: one is to directly throw the filling pipe to the upper edge area of ​​the goaf. This layout method usually requires the goaf to have an open edge area, which has low universality. The other is to install the filling casing after constructing the filling hole in the upper rock mass of the goaf. It is suitable for underground goafs that are at least closed at the top. This type of goaf accounts for a large proportion. At present, the installation of filling casing generally adopts seamless steel pipe directly inserted into the pre-opened filling hole, and then the external filling pipeline is connected to the filling casing for filling operation. During this process, cement slurry is needed to fill the gap between the two to avoid leakage of filling slurry from the gap. On the one hand, it is necessary to wait for the sealing cement of the hole to solidify before starting the filling operation, which restricts the filling efficiency. On the other hand, after the cement slurry solidifies, the filling casing and the filling hole are condensed into one. After the filling is completed, the filling casing is difficult to recover and the recycling cost is high. Usually, it can only be discarded and cannot be reused, which adds extra mining costs. Utility Model Content

[0003] The utility model aims to provide a reusable underground empty area filling hole casing to solve the problem that when the existing goaf is filled, the filling pipeline at the feed port is difficult to recover and cannot be reused, thereby increasing the mining cost.

[0004] The utility model is realized by the following technical solutions:

[0005] The utility model proposes a reusable underground empty area filling hole casing, comprising a filling hole excavated in the upper rock mass of the underground empty area, and a casing arranged through the filling hole, a rubber sleeve is arranged outside the casing, two ends of the rubber sleeve are fixedly connected to the casing, an air cavity is formed between the rubber sleeve and the casing, a ventilation component is arranged through the casing or the rubber sleeve, one end of the ventilation component is arranged in the air cavity, and the other end is arranged outside which can be contacted;

[0006] Based on the above technical features, when filling is required, the casing is placed in the filling hole, and after gas is injected into the air cavity from the ventilation component, the rubber sleeve expands outward and contacts the wall of the filling hole to complete the filling of the gap between the casing and the filling hole, thereby avoiding the overflow of the filling slurry during the filling process; after the filling is completed, the gas in the air cavity is released, the rubber sleeve shrinks and fits the casing, and the casing is taken out to complete the entire filling operation. The filling hole casing has a simple structure, is easy to operate, does not require waiting, and can be reused, and has the advantages of high operating convenience, high filling efficiency, and is conducive to reducing mining costs;

[0007] Furthermore, a concave groove is protruding from the outer wall of the sleeve, and the end of the rubber sleeve is fitted with the concave groove through a fastening ring. The fastening ring is nested with the concave groove and compresses the end of the rubber sleeve to form a sealing structure, so as to achieve fixation and sealing between the rubber sleeve and the sleeve;

[0008] Furthermore, the ventilation component is a valve core, which can conveniently realize the sealing of air intake, exhaust and air cavity by only one component, has a simple structure, and the valve core is a standard part, which is conducive to reducing manufacturing costs;

[0009] Furthermore, a rubber airtight layer is attached to the inside of the rubber sleeve, and the rubber airtight layer is made of halogenated butyl rubber. The rubber airtight layer has good density and self-healing function, and can effectively deal with the deflation caused by the penetration of sharp protrusions on the wall of the filling hole. This design can improve the overall airtightness and durability of the rubber sleeve;

[0010] Preferably, there are several rubber sleeves, and the rubber sleeves are arranged in layers along the sleeve to better fit the filling hole, especially when the filling hole is a hole of non-uniform diameter, to improve the effectiveness of gap filling;

[0011] Preferably, the rubber sleeve is one, and the outer portion of the rubber sleeve is provided with limiting rings at intervals, and the limiting rings divide the rubber sleeve into several sections, and also divide the internal air cavity into several sections, so as to better fit the filling hole, especially when the filling hole is a hole of non-uniform diameter, to improve the effectiveness of gap filling;

[0012] Furthermore, the casing is a seamless steel pipe or a steel wire mesh skeleton polyethylene composite pipe;

[0013] Furthermore, a connector is provided at one end of the sleeve located outside the empty area, and the sleeve is connected to an external filling pipeline via the connector. The connector is a flange. This design facilitates the rapid laying of the filling pipeline and simplifies the operation process.

[0014] Beneficial Effects

[0015] One of the above technical solutions has the following advantages or beneficial effects:

[0016] In order to solve the problems of low efficiency in filling the gaps in the filling casing and the inability to be recycled, a rubber sleeve is arranged outside the filling casing to form an air cavity of variable size between the rubber sleeve and the casing. The air cavity drives the rubber sleeve to expand and contract, thereby achieving filling of the gap between the casing and the filling hole and rapid recovery of the casing. This method has the advantages of simple structure, high convenience in operation, high filling efficiency, reusability, and is conducive to reducing mining costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0018] Figure 1 The structure of the utility model is shown in FIG. Figure 1 ;

[0019] Figure 2 For this utility model Figure 1 Schematic diagram of the structure of part A;

[0020] Figure 5 For this utility model Figure 1 Schematic diagram of the structure of part B;

[0021] Figure 3 The structure of the utility model is shown in FIG. Figure 2 ;

[0022] Figure 4 The structure of the utility model is shown in FIG. Figure 3 ;

[0023] In the figure: filling hole 100; rock mass 200; casing 1; connecting piece 11; concave groove 12; rubber sleeve 2; rubber airtight layer 21; fastening ring 3; air cavity 4; ventilation component 5; hollow tube 51; core rod 52; convex ring 521; rubber tube 53; limit ring 6. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below in conjunction with the embodiments, but the implementation manner of the present invention is not limited thereto.

[0025] The utility model provides a reusable underground empty area filling hole casing, including a filling hole 100 excavated in the upper rock mass 200 of the underground empty area, and a casing 1 arranged through the filling hole 100, wherein the casing 1 is a seamless steel pipe or a wire mesh skeleton polyethylene composite pipe, and the end of the casing 1 located outside the empty area is provided with a connector 11, and the casing 1 is connected with an external filling pipeline through the connector 11, and the connector 11 is arranged higher than the orifice of the filling hole 100 to reserve sufficient installation space for the external filling pipeline and the external gas source, and the connector 11 is a flange; a rubber sleeve 2 is provided on the outside of the casing 1, and a rubber airtight layer 21 is attached to the inside of the rubber sleeve 2, and the rubber airtight layer 21 is made of halogenated butyl rubber; the two ends of the rubber sleeve 2 are fixedly connected to the casing 1, such as Figure 2 As shown, the fixed connection method is specifically as follows: a concave groove 12 is protruded from the outer wall of the sleeve 1, and the end of the rubber sleeve 2 is fitted with the concave groove 12 through a fastening ring 3, and the fastening ring 3 and the concave groove 12 are nested and matched to compress the end of the rubber sleeve 2 to form a sealing structure; an air cavity 4 is formed between the rubber sleeve 2 and the sleeve 1, and a ventilation component 5 is penetrated through the sleeve 1 or the rubber sleeve 2, and one end of the ventilation component 5 is arranged in the air cavity 4, and the other end is arranged on the accessible outside, as shown in FIG. Figure 3 As shown, the ventilation component 5 is arranged on the rubber sleeve 2, and the ventilation component 5 is a valve core. The valve core is a commonly used ventilation component for inflatable tires, footballs, basketballs, etc., and its basic structure is: it includes a hollow tube 51 and a core rod 52. The hollow tube 51 is provided with a rubber tube 53 on one side close to the inside of the sleeve 1, and an air nozzle is formed at the lower end of the rubber tube 53. The core rod 52 is provided with an external spring and embedded in the rubber tube 53. The lower end of the core rod 52 is provided with a convex ring 521 for closing the air nozzle; as a feasible implementation method, the ventilation component 5 can also be penetrated through the concave groove 12 of the sleeve 1, which can be more convenient to connect to an external air source.

[0026] It is usually difficult to form a completely equal diameter hole in the filling hole 100. In order to better fit the filling hole 100, improve the effectiveness of gap filling, and avoid gap overflow, such as Figure 4 As shown, as a feasible implementation, there are several rubber sleeves 2, and the rubber sleeves 2 are arranged in layers along the sleeve 1, and each layer is evenly provided with a valve core. When inflating, the lowest layer of air cavity is inflated first, and then upwards. When exhausting, the reverse operation can be performed; Figure 5As shown, as another feasible implementation, the rubber sleeve 2 is one, and the outer portion of the rubber sleeve 2 is provided with spaced apart limiting rings 6, the limiting rings 6 divide the rubber sleeve 2 into several sections, the limiting rings 6 can be fixed to the sleeve 1 by a connecting bracket (not shown in the drawings), and the internal air cavity 4 is also divided into several sections. This design can reduce the fixing structure of the rubber sleeve 2 and the sleeve 1, simplify the inflation and exhaust structures, and simplify the structure of the sleeve 1;

[0027] In actual use, before the filling operation begins, the casing 1 is placed in the filling hole 100, the external air source interface presses the core rod 52 to move it downward, the air nozzle is opened, and the external air enters the air cavity 4, the air cavity 4 expands, and drives the rubber sleeve 2 to expand outward and contact the wall of the filling hole 100, completing the filling of the gap between the casing 1 and the filling hole 100; after the inflation is completed, the external air source is removed, the core rod 52 rebounds due to the spring, the convex ring 521 thereon closes the air nozzle, the external filling pipeline is connected, and the filling operation is started; after the filling is completed, the core rod 52 is pressed downward and the air nozzle is opened by an external tool to release the gas in the air cavity 4, the rubber sleeve 2 shrinks and fits the casing 1, and is separated from the filling hole 100, and the casing 1 is taken out to complete the entire filling operation; the casing 1 of the filling hole 100 has a simple overall structure, and has the advantages of high operational convenience, high filling efficiency, reusability, and conducive to reducing mining costs.

[0028] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the present invention.

Claims

1. A reusable underground empty area filling hole casing, comprising a filling hole excavated in the upper rock mass of the underground empty area, and a casing arranged through the filling hole, characterized in that: A rubber sleeve is provided outside the sleeve, and both ends of the rubber sleeve are fixedly connected to the sleeve, an air cavity is formed between the rubber sleeve and the sleeve, and a ventilation component is penetrated through the sleeve or the rubber sleeve, one end of the ventilation component is arranged in the air cavity, and the other end is arranged on the accessible outside.

2. A reusable underground void filling hole casing according to claim 1, characterized in that: The outer wall of the sleeve is protruding with a concave groove, and the end of the rubber sleeve is fitted with the concave groove through a fastening ring. The fastening ring is nested with the concave groove and compresses the end of the rubber sleeve to form a sealing structure.

3. A reusable underground empty space filling hole casing according to claim 1, characterized in that: The ventilation component is a valve core.

4. The reusable underground void filling hole casing according to claim 1, characterized in that: A rubber airtight layer is attached to the inside of the rubber sleeve, and the rubber airtight layer is made of halogenated butyl rubber.

5. A reusable underground void filling hole casing according to any one of claims 1 to 4, characterized in that: There are a plurality of rubber sleeves, which are arranged in layers along the sleeve.

6. A reusable underground void filling hole casing according to any one of claims 1 to 4, characterized in that: There is one rubber sleeve, and limiting rings are arranged at intervals on the outside of the rubber sleeve, and the limiting rings divide the rubber sleeve into several sections.

7. The reusable underground empty space filling hole casing according to claim 1, characterized in that: The casing is a seamless steel pipe or a steel wire mesh skeleton polyethylene composite pipe.

8. The reusable underground void filling hole casing according to claim 1, characterized in that: A connector is provided at one end of the sleeve located outside the empty area, and the sleeve is connected to an external filling pipeline through the connector, and the connector is a flange.

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