Creep test device for ultrahigh water filling material of coal mine

Abstract

The utility model discloses a coal mine ultrahigh water filling material creep test device which comprises a support, a sliding groove is formed in the side surface of the inner wall of the support, the coal mine ultrahigh water filling material creep test device further comprises a movable plate, the movable plate slides in the sliding groove of the support, and the movable plate is connected with a test structure. The test structure can carry out different-pressure detection experiments on the ultrahigh water filling materials in different material grooves through a pressing block, the test structure comprises a lead screw, the lead screw rotationally penetrates through the outer surface of a moving plate and is rotationally installed in a sliding groove in one side of a support, one end of the lead screw is connected with a motor, and the other end of the lead screw is connected with a rotating shaft. The motor is installed on the rear surface of the support. According to the coal mine ultrahigh water filling material creep test device, the test structure is arranged, different pressures are applied to the three troughs through the pressing blocks to simulate the long-term pressed state, a contrast test is facilitated, the observation structure is further arranged, and the troughs are freely observed at any time through the observation mirror.

Description

Technical Field

[0001] The utility model relates to the technical field of creep test of super-high water filling materials, in particular to a creep test device of super-high water filling materials in coal mines. Background Art

[0002] Compared with general concrete, ultra-high water filling materials have a larger water-cement ratio and there is more free water inside the cementing body. Under long-term pressure, how will the strength of this material change after the free water seeps out, especially in the confined and semi-confined areas of the underground space of mines? Observing the volume change and load damage plays a key role in the success of underground filling in the mining field.

[0003] However, due to the complexity of coal rock geological conditions, the concealment of filling projects, the difficulty of on-site observation requires a lot of financial and material resources. The existing creep test equipment uses the principle that ultra-high water filling materials will seep out free water when they feel pressure in coal rock geology. In the experiment, the ultra-high water filling material is pressurized through a mechanical cylinder structure. This structure can detect the changes in the pressure of the ultra-high water filling material. However, it is impossible to perform comparative tests on multiple materials at different pressures at the same time, which makes the test have certain limitations. Therefore, it is necessary to compare the ultra-high water filling materials under different pressures and the changes after the internal free water seeps out. Utility Model Content

[0004] The utility model aims to provide a creep test device for coal mine super-high water filling materials, so as to solve the problem of lack of effective indoor test devices and means to verify the filling theory of super-high water filling materials on site proposed in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a creep test device for ultra-high water filling materials in coal mines, comprising a bracket, a slide groove is provided on the inner wall side surface of the bracket, and also comprises a movable plate, the movable plate slides in the slide groove of the bracket, the movable plate is connected to a test structure, and the test structure can perform detection experiments of ultra-high water filling materials in different material troughs at different pressures through a pressing block.

[0006] Preferably, the test structure includes a screw rod, which rotates and penetrates the outer surface of the movable plate, and is rotatably installed in a slide groove on one side of the bracket, one end of the screw rod is connected to a motor, and the motor is installed on the upper surface of the bracket, and three cylinders are installed at equal intervals on the upper surface of the bracket, and a pressure block is installed at the lower end of the piston rod of the cylinder, and a material trough is installed on the upper surface of the movable plate, and a water outlet is provided on the lower surface of the material trough.

[0007] By adopting the above technical solution, the material in the trough can be extruded by the pressing block.

[0008] Preferably, the test structure further comprises a connecting plate, wherein the connecting plate is fixedly mounted on the lower surface of the movable plate, and three weight sensors are evenly spaced on the upper surface of the connecting plate, and a water receiving box is arranged on the upper surface of the weight sensor.

[0009] By adopting the above technical solution, the water discharge conditions of the material under different pressures can be detected through the weight sensor.

[0010] Preferably, the upper part of the water receiving box corresponds to the water outlet provided on the lower surface of the material trough.

[0011] The adoption of the technical solution facilitates water flow into the water receiving box.

[0012] Preferably, the lower side of the pressing block corresponds to the material trough.

[0013] By adopting the above technical solution, the pressed blocks can enter the material trough accurately.

[0014] Preferably, an observation structure is provided on the front surface of the movable plate, and the observation structure can rotate and stretch the telescopic plate to observe the ultra-high water filling material through an observation mirror.

[0015] The above technical solution is adopted to facilitate observation of the test situation.

[0016] Preferably, the observation structure includes a connecting rod, which rotates through the front surface of the movable plate, the connecting rod is rotatably connected to the telescopic plate, and an observation mirror is installed at the other end of the telescopic plate, and a card slot is installed on the front surface of the movable plate.

[0017] By adopting the above technical solution, the observation mirror can be freely rotated to observe the material conditions of different material troughs.

[0018] Compared with the prior art, the utility model has the following beneficial effects: the creep test device for ultra-high water filling materials in coal mines:

[0019] 1. The creep test device for ultra-high water filling materials in coal mines is equipped with a test structure. First, the materials are placed in three material troughs respectively, and then different pressures are applied to the pressing blocks through the cylinder to pressurize the materials in the troughs, simulating the long-term pressure state of ultra-high water filling materials, and testing the strength changes of ultra-high water filling materials after free water seepage;

[0020] 2. Furthermore, the free water in the ultra-high water filling material seeps out under the action of different pressures and enters the water receiving box through the drain port, and then the water volume is detected by the weight sensor, which is convenient for comparative observation of different water volumes caused by different high-intensity pressures;

[0021] 3. Furthermore, an observation structure is provided. By rotating and picking up the observation mirror and then stretching the telescopic plate, the three material troughs can be observed separately through the observation mirror. When not in use, the observation mirror can be placed on the card slot, which can make observation more convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the shaft side surface structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the front section structure of the utility model;

[0024] Figure 3 This is a schematic diagram of the axial front sectional structure of the utility model;

[0025] Figure 4 It is a schematic diagram of the cross-sectional structure of the movable plate of the utility model.

[0026] In the figure: 1. bracket; 2. movable plate; 3. material trough; 4. connecting plate; 5. screw rod; 6. motor; 7. water collecting box; 8. weight sensor; 9. cylinder; 10. pressure block; 11. slot; 12. connecting rod; 13. telescopic plate; 14. observation mirror. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1-4 The utility model provides a technical solution: a creep test device for ultra-high water filling materials in coal mines, comprising a bracket 1, a movable plate 2, a material trough 3, a connecting plate 4, a screw 5, a motor 6, a water receiving box 7, a weight sensor 8, a cylinder 9, a pressure block 10, a card slot 11, a connecting rod 12, a telescopic plate 13, and an observation mirror 14.

[0029] Example 1

[0030] The creep test device for coal mine ultra-high water filling materials is provided with a test structure, which can conduct comparative tests on the strength of materials under different pressure conditions in different troughs 3, specifically:

[0031] A slide groove is provided on the inner wall side surface of the bracket 1, and the movable plate 2 slides in the slide groove of the bracket 1. The movable plate 2 is connected to a test structure, which includes a screw rod 5. The screw rod 5 rotates and penetrates the outer surface of the movable plate 2, and the screw rod 5 is rotatably installed in a slide groove on one side of the bracket 1. One end of the screw rod 5 is connected to a motor 6, and the motor 6 is installed on the rear surface of the bracket 1. Three cylinders 9 are evenly installed on the upper surface of the bracket 1, and a pressure block 10 is installed at the lower end of the piston rod of the cylinder 9. A material trough 3 is installed on the upper surface of the movable plate 2, and a water outlet is provided on the lower surface of the material trough 3. The test structure also includes a connecting plate 4, which is fixedly installed on the lower surface of the movable plate 2, and three weight sensors 8 are evenly arranged on the upper surface of the connecting plate 4. A water receiving box 7 is arranged on the upper surface of the weight sensor 8, and the upper part of the water receiving box 7 corresponds to the water outlet provided on the lower surface of the material trough 3, and the lower part of the pressure block 10 corresponds to the material trough 3.

[0032] When the creep test device for coal mine ultra-high water filling materials is used, Figure 1 As shown, first, the motor 6 is turned on, and then the motor 6 drives the screw rod 5 to rotate. Since the screw rod 5 rotates and penetrates the outer surface of the movable plate 2, the screw rod 5 causes the movable plate 2 to move forward in the slide groove opened on the inner wall side surface of the bracket 1, and then the ultra-high water filling material is placed in the three material troughs 3, and then the motor 6 is turned on to make the screw rod 5 reverse and drive the movable plate 2 to retract, and then the cylinder 9 on the upper surface of the bracket 1 is turned on, so that the cylinder 9 drives the pressure block 10 downward to squeeze the material inside the material trough 3, and then the three cylinders 9 are adjusted to different degrees of pressure, so that the materials in the three material troughs 3 are subjected to different pressures, simulating the long-term pressure state of the ultra-high water filling material under the geological conditions of coal rock mass. Different pressures can test the different strength changes of the ultra-high water filling material after the internal free water seeps out under the action of pressure. Further, the free water of the material in the material trough 3 will enter the interior of the water receiving box 7 through the drain port, and then the water volume is detected by the weight sensor 8, which can be detected and compared according to the water outlet conditions at different pressures.

[0033] Example 2

[0034] The creep test device for ultra-high water filling materials in coal mines is also provided with an observation structure, which can freely observe the material in the trough 3 by pulling the observation mirror 14, specifically:

[0035] An observation structure is provided on the front surface of the movable plate 2, and the observation structure includes a connecting rod 12, the connecting rod 12 rotates and penetrates the front surface of the movable plate 2, the connecting rod 12 is rotatably connected to a telescopic plate 13, and an observation mirror 14 is installed at the other end of the telescopic plate 13, and a card slot 11 is installed on the front surface of the movable plate 2;

[0036] On the front surface of the movable plate 2, the observation mirror 14 is rotated through the connecting rod 12 so that the observation mirror 14 leaves the card slot 11, and then the telescopic plate 13 is stretched, so that the observation mirror 14 can observe the three material troughs 3, which is more flexible to use. When not in use, the telescopic plate 13 can drive the observation mirror 14 to be placed above the card slot 11, which occupies a small area and does not affect other operations in the test.

[0037] Working principle: When using the creep test device for super-high water filling materials in coal mines, a test structure is provided, which can perform detection experiments of different pressures on the super-high water filling materials in different material troughs 3 through the pressing block 10. An observation structure is also provided, which can rotate the stretching telescopic plate 13 to observe the super-high water filling materials through the observation mirror 14, thereby increasing the overall practicality.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A creep test device for coal mine super-high water filling materials, comprising a bracket (1), wherein a slide groove is provided on the inner wall side surface of the bracket (1), characterized in that: It also comprises a movable plate (2), wherein the movable plate (2) slides in a slide groove of the bracket (1), and the movable plate (2) is connected to a test structure, and the test structure can perform different pressure detection experiments on ultra-high water filling materials in different material tanks (3) through a pressing block (10).

2. A creep test device for coal mine super-high water filling materials according to claim 1, characterized in that: The test structure comprises a screw (5), the screw (5) rotates and penetrates the outer surface of the movable plate (2), and the screw (5) is rotatably installed in a slide groove on one side of the bracket (1), one end of the screw (5) is connected to a motor (6), and the motor (6) is installed on the rear surface of the bracket (1), three cylinders (9) are installed at equal intervals on the upper surface of the bracket (1), and a pressure block (10) is installed at the lower end of the piston rod of the cylinder (9), and a material trough (3) is installed on the upper surface of the movable plate (2), and a water outlet is provided on the lower surface of the material trough (3).

3. A creep test device for coal mine super-high water filling materials according to claim 2, characterized in that: The test structure also includes a connecting plate (4), the connecting plate (4) is fixedly mounted on the lower surface of the movable plate (2), and three weight sensors (8) are arranged at equal intervals on the upper surface of the connecting plate (4), and a water receiving box (7) is arranged on the upper surface of the weight sensor (8).

4. A creep test device for coal mine super-high water filling materials according to claim 3, characterized in that: The upper part of the water receiving box (7) corresponds to the water outlet provided on the lower surface of the material trough (3).

5. A creep test device for coal mine super-high water filling materials according to claim 2, characterized in that: The lower side of the pressing block (10) corresponds to the material trough (3).

6. A creep test device for coal mine super-high water filling materials according to claim 1, characterized in that: The front surface of the movable plate (2) is provided with an observation structure, and the observation structure is capable of rotating the stretchable plate (13) to observe the ultra-high water filling material through the observation mirror (14).

7. A creep test device for coal mine super-high water filling materials according to claim 6, characterized in that: The observation structure comprises a connecting rod (12), wherein the connecting rod (12) is rotatably connected to the front surface of the movable plate (2), the connecting rod (12) is rotatably connected to a telescopic plate (13), and an observation mirror (14) is installed at the other end of the telescopic plate (13), and a card slot (11) is installed on the front surface of the movable plate (2).

Images