Mine filling quality detection device

Abstract

The utility model provides a mine filling quality detection device, which comprises a mold, a water collection tank, a linear shrinkage detector and a curing box, and is characterized in that the curing box is used for simulating an underground filling environment, and the mold is used for filling mine filling slurry; the mold is placed on the water collecting tank and is used for collecting water separated out from the mine filling slurry in the mold; the linear shrinkage detector is arranged at the top of the mold, a detection hole is further formed in the top of the mold, the linear shrinkage detector detects the linear shrinkage of mine filling slurry in the mold through the detection hole, a mine filling test mold is prepared through the mold, and the underground filling environment is simulated through the curing box in the process of preparing the test mold. And the bleeding rate and the linear shrinkage of the mine filling slurry are simultaneously detected by using the water collecting tank and the linear shrinkage detector.

Description

A mine backfill quality testing device Technical Field

[0001] This application relates to the field of mine backfilling technology, specifically to a mine backfilling quality testing device. Background Technology

[0002] Currently, mine backfill quality testing primarily relies on laboratory backfill tests. Based on the backfill materials and mix proportions, backfill molds are prepared for various performance tests. While laboratory test results effectively guide safe backfilling operations in mines, some tests still utilize testing methods from the cement and concrete industries in construction engineering, failing to consider the actual underground backfilling environment and requirements. This leads to discrepancies between test results and on-site applications, causing mining companies to often incorporate significant margins in backfill design to ensure safe production. Therefore, designing a mine backfill quality testing device that ensures the laboratory-prepared molds closely match the on-site backfill material can reduce testing errors and guarantee backfill quality. Summary of the Invention

[0003] To address the technical challenge of providing a mine backfill quality testing device that ensures the consistency between laboratory-prepared molds and on-site backfill materials, thereby reducing testing errors and guaranteeing backfill quality, this application provides a mine backfill quality testing device. This device simulates the underground mine environment to cure backfill material molds and tests their solidification. Simultaneously with mold preparation, it also measures the bleeding rate and linear shrinkage rate of the molds, thus guiding the design of mine backfill processes and ensuring safe mine production.

[0004] This application provides a mine backfilling quality testing device, including:

[0005] Molds are used to fill mine backfill slurry.

[0006] A water collection tank, on which the mold is placed, is used to collect water that seeps out from the mine filling slurry inside the mold;

[0007] A linear shrinkage detector is provided on the top of the mold, and the top of the mold is also provided with a detection hole. The linear shrinkage detector detects the linear shrinkage of the mine filling slurry inside the mold through the detection hole.

[0008] A curing box is used to hold the mold and the water collection tank, and to simulate the underground filling environment.

[0009] Furthermore, in this embodiment, filter paper is also included. The bottom of the mold has an opening, the filter paper is disposed at the bottom of the mold, and the filter paper covers the opening.

[0010] Furthermore, in this embodiment, a partition is also provided inside the mold, the partition is disposed on the bottom plate of the mold, and the partition extends along the height direction of the mold.

[0011] Furthermore, in this embodiment, the mold includes a front plate, a rear plate, side plates, and a top cover plate. The front plate, the rear plate, and the two side plates are sequentially detachable and spliced ​​to form a semi-enclosed box. The detection hole is set on the top cover plate, and the top cover plate covers the top of the box.

[0012] Furthermore, in this embodiment, both the bottom sides of the front plate and the rear plate are provided with snap-fit ​​protrusions, and the bottom of the side plate is provided with a snap-fit ​​groove that is adapted to the snap-fit ​​protrusions. The front plate or the rear plate is snapped into the snap-fit ​​groove on the side plate through the snap-fit ​​protrusions.

[0013] Furthermore, in this embodiment, the snap-fit ​​protrusion extends toward the top of the front plate or the rear plate.

[0014] Furthermore, in this embodiment, the side plate includes multiple composite plates, and each of the two ends of the composite plate is provided with a snap-fit ​​component and a snap-fit ​​groove adapted to the snap-fit ​​component. The multiple composite plates are spliced ​​together end to end in sequence through the snap-fit ​​component and the snap-fit ​​groove.

[0015] Furthermore, in this embodiment, the mold further includes a release layer, and the release layer is provided on the surfaces of the front plate, the rear plate, and the side plate.

[0016] Furthermore, in this embodiment, a float plate is also included, which is placed inside the mold to assist the linear shrinkage detector.

[0017] Furthermore, in this embodiment, the maintenance box is also provided with a diffusion trough and a water-retaining cotton. The diffusion trough is disposed on the inner side wall of the maintenance box, and the water-retaining cotton is placed in the diffusion trough.

[0018] Beneficial Effects: This application provides a mine backfill quality testing device, including a mold, a water collection tank, a linear shrinkage detector, and a curing box. The curing box is used to simulate the underground backfill environment, and the mold is used to fill the mine backfill slurry. The mold is placed on the water collection tank to collect the water that seeps out of the mine backfill slurry inside the mold. The linear shrinkage detector is set on the top of the mold, and the top of the mold is also provided with a detection hole. The linear shrinkage detector detects the linear shrinkage of the mine backfill slurry inside the mold through the detection hole. The mold is used to prepare a mine backfill test mold, and during the preparation of the test mold, the curing box simulates the underground backfill environment. The water collection tank and the linear shrinkage detector are used to simultaneously detect the bleeding rate and linear shrinkage of the mine backfill slurry.

[0019] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of this application, the accompanying drawings used in this application will be briefly described below. Obviously, the drawings described below are merely some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0021] Figure 1 is a structural schematic diagram of a mine backfilling quality detection device provided in an embodiment of this application;

[0022] Figure 2 is a diagram showing the usage status of the mine backfilling quality detection device in the embodiment of this application;

[0023] Figure 3 is a cross-sectional view of the mold in an embodiment of this application;

[0024] Figure 4 is a top view of the front or rear panel in an embodiment of this application.

[0025] Explanation of reference numerals in the attached figures:

[0026] 10. Molds;

[0027] 110. Filter paper; 120. Partition; 130. Front plate; 140. Back plate; 150. Side plate;

[0028] 151. Combination plate; 152. Snap-fit ​​component; 153. Snap-fit ​​groove; 160. Top cover plate; 170. Inspection hole;

[0029] 181. Snap-fit ​​protrusion; 182. Snap-fit ​​slot;

[0030] 20. Water collection tank;

[0031] 30. Linearity detector;

[0032] 40. Maintenance box;

[0033] 410. Dispensing trough; 420. Water-retaining cotton. Detailed Implementation

[0034] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0035] 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 application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0036] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0037] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0038] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0039] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0040] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0041] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0042] As national policies increasingly require mines to adopt green development as a core principle, and promote the inclusion of backfill mining technology in the green mine construction evaluation system, gradually achieving goals such as "recycling of solid waste resources and safe and efficient recovery of minerals," backfill quality has become a core guarantee for the safety, resource utilization, environmental protection, and economic benefits of green mines. Substandard quality may lead to the failure of backfill support, resulting in roof collapse, rock bursts, or water seepage accidents, affecting the normal and safe production of the mine.

[0043] Currently, mine backfill quality testing primarily relies on laboratory backfill tests. Based on the backfill materials and mix proportions, backfill molds are prepared for various performance tests. While laboratory test results effectively guide safe backfilling operations in mines, some tests still utilize testing methods from the cement and concrete industries in construction engineering, failing to consider the actual underground backfilling environment and requirements. This leads to discrepancies between test results and on-site applications, causing mining companies to often incorporate significant margins in backfill design to ensure safe production. Therefore, designing a mine backfill quality testing device that ensures the laboratory-prepared molds closely match the on-site backfill material can reduce testing errors and guarantee backfill quality.

[0044] To address the technical challenge of providing a mine backfill quality testing device that ensures the consistency between laboratory-prepared molds and on-site backfill materials, thereby reducing testing errors and guaranteeing backfill quality, this application provides a mine backfill quality testing device. This device simulates the underground mine environment to cure backfill material molds and tests their solidification. Simultaneously with mold preparation, it also measures the bleeding rate and linear shrinkage rate of the molds, thus guiding the design of mine backfill processes and ensuring safe mine production.

[0045] Please refer to Figure 1. Figure 1 is a structural schematic diagram of a mine backfilling quality testing device provided in an embodiment of this application. The mine backfilling quality testing device includes: a mold 10, a water collection tank 20, a linear shrinkage detector 30, and a curing box 40. The curing box 40 is used to simulate the underground backfilling environment, and the mold 10 is used to fill the mine backfilling slurry. The mold 10 is placed on the water collection tank 20 to collect the water that seeps out of the mine backfilling slurry in the mold 10. The linear shrinkage detector 30 is set on the top of the mold 10, and the top of the mold 10 is also provided with a detection hole 170. The linear shrinkage detector 30 detects the linear shrinkage of the mine backfilling slurry in the mold 10 through the detection hole 170. The mold 10 is used to prepare a mine backfilling test mold, and during the preparation of the test mold, the curing box 40 simulates the underground backfilling environment. The water collection tank 20 and the linear shrinkage detector 30 are used to simultaneously detect the bleeding rate and linear shrinkage of the mine backfilling slurry.

[0046] For example, as shown in Figures 1-2, in this embodiment, the mold 10 and the water collection tank 20 are weighed and their weight data are recorded. After the slurry is prepared according to the filling ratio, it is poured into the mold 10 with a ladle. The height of the mining filling slurry in the mold 10 is measured and recorded. After the mold is poured, the mold 10 is weighed again. The mold 10 is placed on top of the water collection tank 20. The mold 10 and the water collection tank 20 are placed in the curing box 40, and the curing box 40 is gently moved to the room. In a cool, flat area, after the preset time has elapsed, the mold 10 and water collection tank 20 are removed from the curing box 40. The solidification of the mine filling slurry in the mold 10 is then determined. Once the mold is confirmed to be basically solidified, the linear shrinkage detector 30 is installed on the top of the mold 10. The linear shrinkage detector 30 measures the change in the height of the mold through the detection hole 170 on the top of the mold 10 to determine the linear shrinkage of the mine filling slurry. The water content in the water collection tank 20 is weighed to calculate the bleeding rate of the mine filling slurry.

[0047] In some embodiments, as shown in FIG3, a filter paper 110 is also included. The bottom of the mold 10 is provided with an opening, and the filter paper 110 is disposed at the bottom of the mold 10 and covers the opening. By providing the filter paper 110 at the bottom of the mold 10, the leakage of the mold 10 is prevented while ensuring that the water of the mine filling slurry in the mold 10 can seep into the water collection tank 20.

[0048] For example, in this embodiment, the bottom of the mold 10 is provided with multiple layers of filter paper 110. The multiple layers of filter paper 110 increase the bearing capacity of the filter paper 110 at the bottom of the mold 10, thereby preventing the filter paper 110 from breaking.

[0049] In some embodiments, a partition 120 is also provided inside the mold 10. The partition 120 is disposed on the bottom plate of the mold 10 and extends along the height direction of the mold 10. In this embodiment, the partition 120 can serve as a reference for the final height of the sample to assist the operator in determining the height of the slurry inside the mold 10.

[0050] In some embodiments, as shown in FIG2, the mold 10 includes a front plate 130, a rear plate 140, a side plate 150, and a top cover plate 160. The front plate 130, the rear plate 140, and the two side plates 150 are sequentially detachably spliced ​​to form a box body with a semi-enclosed structure. The detection hole 170 is provided on the top cover plate 160, and the top cover plate 160 is fastened to the top of the box body. The detachable mold 10 makes it easy for the operator to demold the test mold from the mold 10.

[0051] In some embodiments, as shown in FIG4, the bottom sides of the front plate 130 and the rear plate 140 are provided with snap-fit ​​protrusions 181, and the bottom of the side plate 150 is provided with a snap-fit ​​groove 182 that is adapted to the snap-fit ​​protrusions 181. During use, the front plate 130 or the rear plate 140 is snapped into the snap-fit ​​protrusions 181 and the snap-fit ​​groove 182 on the side plate 150, thereby ensuring that the front plate 130 or the rear plate 140 can be securely snapped into the side plate 150, while making the mold 10 easier to load and unload.

[0052] In some embodiments, the snap-fit ​​protrusion 181 extends towards the top of the front plate 130 or the rear plate 140, increasing the contact area between the snap-fit ​​protrusion 181 and the test plate, thereby improving the stability of the front plate 130 or the rear plate 140 when spliced ​​with the test plate.

[0053] In some embodiments, as shown in FIG3, the side plate 150 includes a plurality of combined plates 151. The two ends of the combined plates 151 are respectively provided with snap-fit ​​members 152 and snap-fit ​​grooves 153 adapted to the snap-fit ​​members 152. The plurality of combined plates 151 are spliced ​​together end to end by the snap-fit ​​members 152 and the snap-fit ​​grooves 153. In this embodiment, the side plate 150 formed by splicing together a plurality of combined plates 151 makes it easier for the operator to demold the trial mold from the mold 10.

[0054] In some embodiments, the mold 10 also includes a release layer. The surfaces of the front plate 130, the rear plate 140 and the side plate 150 are all provided with a release layer. The release layer reduces the adhesion between the test mold and the mold 10, thereby allowing the operator to easily demold the test mold from the mold 10.

[0055] For example, in this embodiment, lubricating oil is applied to the surfaces of the front plate 130, the rear plate 140, and the side plate 150, or the front plate 130, the rear plate 140, and the side plate 150 are immersed in lubricating oil, so that the lubricating oil forms a release layer on the surfaces of the front plate 130, the rear plate 140, and the side plate 150.

[0056] In some embodiments of this invention, a float is also included. The float is placed inside the mold 10 to assist the linear shrinkage detector 30. It is understood that in this embodiment, the float serves as a high-precision transmission medium for slurry deformation. Through its lightweight and stable physical properties, it transforms the slurry surface volume change, which is difficult to observe directly, into a quantifiable mechanical displacement. Finally, the linear shrinkage detector 30 is used to accurately measure the linear shrinkage during the solidification process.

[0057] In some embodiments, as shown in Figure 1, the curing box 40 is also provided with a dispersing groove 410 and a water-storing cotton 420. The dispersing groove 410 is located on the inner side wall of the curing box 40, and the water-storing cotton 420 is placed in the dispersing groove 410. During use, after the water-storing cotton 420 is filled with water, it is stuffed into the dispersing groove 410 of the curing box 40. Then, the water collection tank 20 together with the mold 10 on it is gently placed into the curing box 40, and the sealing cover is closed. Then, the curing box 40 is gently moved to a cool, flat place indoors to simulate the underground filling environment.

[0058] In summary, referring to Figures 1-4, in this embodiment, based on the underground filling requirements of a domestic mine, a filling ratio is prepared. Before molding, lubricating oil is evenly applied to the inner walls of the front plate 130, rear plate 140, and side plate 150 using an oil brush. After draining excess lubricating oil, the front plate 130, rear plate 140, and side plate 150 are spliced ​​together. The water collection tank 20 is placed on an electronic scale for weighing. Then, two layers of filter paper 110 are laid on the filter plate of the water collection tank 20. The assembled mold 10 is then placed on the water collection tank 20 for weighing. After preparing the slurry according to the filling ratio, the slurry is poured into the mold 10 with a ladle, with the pouring height exceeding the height of the partition plate 120 by 2-5 cm. The distance from the slurry surface to the top of the front plate 130 is measured with a ruler. After pouring the mold, the mold 10 is weighed again. Gently place the float on the slurry surface with tweezers, then fix the test mold testing platform above the mold 10, open the testing hole 170, and use the linear shrinkage detector 30 to test the initial height of the slurry inside the mold 10. After saturating the two water-retaining cottons 420 with water, insert them into the dispersing trough 410 of the curing box 40, then gently place the water collection trough 20 along with the mold 10 above it into the curing box 40, and cover it with the sealing cap. Then gently move the curing box 40 to a cool, flat place indoors.

[0059] After approximately 28 hours of curing, open the sealed cover of the curing box 40 and gently remove the water collection tank 20 and the mold 10.

[0060] The solidification of the mold was measured using an inertial ingressor. During the measurement, the height of the inertial ingressor was slowly lowered to the surface of the mold, and then the inertial ingressor was suddenly released. The needle tip did not sink into the mold, and the descent height was very small, which met the demolding conditions.

[0061] After confirming that the mold has basically solidified, the change in mold height is measured again using a linear shrinkage detector 30. First, the telescopic rod is adjusted, and then the measuring rod is adjusted so that the measuring head contacts the surface of the mold. The dial gauge reading is then read. According to the formula, the linear shrinkage of the filling material with this ratio is: (5.23-4.88)×100% / (2×70.7-24)=0.298%.

[0062] After measuring the linear shrinkage rate of the mold, remove the mold testing table, put on gloves and disassemble the side plates 150 and the rear plate 140 on both sides of the mold 10. Then, gently press the bottom of the mold with your hand and push the mold out of the front plate 130 to complete the demolding. Place the removed mold in a standard curing box for curing.

[0063] After removing the filter paper 110 from the water collection tank 20, the water collection tank 20 is weighed. According to the formula, the water bleeding rate of the filling material with this ratio is: (234.4-223.6)×100% / [(2873.1-1746.4)×(1-0.7)]=3.2%.

[0064] Then, the oozing water in the collection tank 20 is poured into an empty bottle for pollutant testing or harmless treatment.

[0065] Finally, the mold 10 was cleaned to complete the preparation of the filling body test mold, and the measurement of the bleeding rate and linear shrinkage rate.

[0066] It should be noted that this application is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments with the same structure and effect as the technical concept within the scope of this application are included in the technical scope of this application. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, without departing from the spirit of this application, are also included in the scope of this application.

Claims

1. A device for detecting the quality of mine backfilling, characterized in that, include: Molds are used to fill mine backfill slurry. A water collection tank, on which the mold is placed, is used to collect water that seeps out from the mine filling slurry inside the mold; A linear shrinkage detector is provided on the top of the mold, and the top of the mold is also provided with a detection hole. The linear shrinkage detector detects the linear shrinkage of the mine filling slurry inside the mold through the detection hole. A curing box is used to hold the mold and the water collection tank, and to simulate the underground filling environment.

2. The mine backfilling quality testing device according to claim 1, characterized in that, It also includes filter paper, the bottom of the mold has an opening, the filter paper is disposed at the bottom of the mold and covers the opening.

3. The mine backfilling quality testing device according to claim 1, characterized in that, The mold is also provided with a partition, which is disposed on the bottom plate of the mold and extends along the height direction of the mold.

4. The mine backfilling quality testing device according to claim 1, characterized in that, The mold includes a front plate, a rear plate, side plates, and a top cover plate. The front plate, the rear plate, and the two side plates are detachably assembled to form a semi-enclosed box. The detection hole is located on the top cover plate, which covers the top of the box.

5. The mine backfilling quality testing device according to claim 4, characterized in that, Both the bottom sides of the front plate and the rear plate are provided with snap-fit ​​protrusions, and the bottom of the side plate is provided with a snap-fit ​​groove that is adapted to the snap-fit ​​protrusions. The front plate or the rear plate is snapped into the snap-fit ​​groove on the side plate through the snap-fit ​​protrusions.

6. The mine backfilling quality testing device according to claim 5, characterized in that, The snap-fit ​​protrusion extends toward the top of the front plate or the rear plate.

7. The mine backfilling quality testing device according to claim 4, characterized in that, The side panel includes multiple composite panels. Each composite panel has a snap-fit ​​component and a snap-fit ​​groove adapted to the snap-fit ​​component at both ends. The multiple composite panels are spliced ​​together end to end through the snap-fit ​​component and the snap-fit ​​groove.

8. The mine backfilling quality testing device according to claim 4, characterized in that, The mold also includes a release layer, and the release layer is provided on the surfaces of the front plate, the rear plate and the side plate.

9. The mine backfilling quality testing device according to claim 1, characterized in that, It also includes a float plate, which is placed inside the mold to assist the linear shrinkage detector.

10. The mine backfilling quality testing device according to claim 1, characterized in that, The maintenance box is also equipped with a diffusion trough and a water storage cotton. The diffusion trough is located on the inner side wall of the maintenance box, and the water storage cotton is placed in the diffusion trough.

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