Simulation experiment device capable of removing boundary constraining force

Abstract

The utility model relates to the technical field of coal seam mining experiment simulation, and discloses a simulation experiment device capable of removing boundary constraining force, which comprises a base, a hollow box body is arranged on the base, a coal seam bottom plate, a coal seam and a plurality of rock stratums are sequentially arranged in the box body from bottom to top, demoulding plates are arranged on both sides in the box body, and the demoulding plates are arranged on the bottom of the box body. And the demolding plate is movably connected to the box body through an adjusting device. On the basis of similar material simulation experiments, a traditional model frame is modified, so that the constraint force generated by the frame of the experimental device on the rock stratum can be quickly and safely removed, and the problems that constraint removal of the traditional experimental device is tedious and potential safety hazards exist are effectively solved. And meanwhile, the device can be repeatedly used, is low in price, and is convenient to widely use and popularize in various rock-soil simulation laboratories.

Description

Technical Field

[0001] The utility model relates to the technical field of coal seam mining experimental simulation, in particular to a simulation experimental device capable of removing boundary constraints. Background Art

[0002] Coal resources are buried deep underground. During the mining process, the structure and movement of the overlying rock strata have a great impact on the mining process. At present, the research on coal mining mainly adopts the method of theoretical analysis and field measurement.

[0003] On-site measurement has a long cycle, high cost and great difficulty. The simulation experiment of similar materials can make up for this defect. Before mining, similar materials are used to simulate mining. Through the observation of experimental phenomena, the movement law of the overburden strata affected by mining can be grasped in advance, providing a theoretical basis for safe mining. And the simulation experiment of similar materials has the characteristics of low cost, short cycle and simple operation.

[0004] Similar material simulation experiments are used to simulate a series of overburden movement laws caused by coal mining, simplifying the large-scale stratum structure into a research model that can be completed in the laboratory. The model produces collapse zones, fracture zones, and curved subsidence zones during the simulated mining process, causing surface subsidence and horizontal movement.

[0005] The experimental materials and test models should meet the conditions of geometric similarity, physical similarity, motion similarity, and boundary similarity. In the paving process of the currently commonly used phase experimental device, the similar simulation materials are first stirred evenly and poured into the model. Then, the loose experimental materials are compacted using a loading device to give them a certain strength. After the model is dried, the simulation experiment can be carried out. Because the experimental materials are inevitably squeezed with the model frame during the compaction process, a large constraint force is formed between the model frame and the experimental body, which will seriously affect the accuracy of the experiment. In order to make the experiment consistent with the actual mining situation to the greatest extent, the constraint force generated between the material and the model frame must be removed. Due to design defects, the existing simulation device cannot meet the requirements for removing the constraint force. The currently commonly used method for removing the constraint force is to manually use a saw blade to remove the dried simulated rock layer along the model frame to achieve the purpose of removing the constraint force.

[0006] However, when using a saw blade to cut the rock layer, the saw blade's running trajectory is perpendicular to the surface of the laid two-dimensional similar material model. Under the huge force of the saw blade, the two-dimensional model is difficult to maintain stability and is prone to damage and collapse, causing experimenters to be injured or buried, posing a major safety hazard. Utility Model Content

[0007] The utility model aims to provide a simulation experiment device capable of removing boundary constraints, so as to solve the problems raised in the above-mentioned background technology.

[0008] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0009] A simulation experiment device capable of removing boundary constraints comprises a base, wherein a hollow box is arranged on the base, a coal seam floor, a coal seam and several rock layers are arranged in sequence from bottom to top inside the box, stripping plates are arranged on both sides of the box, and the stripping plates are movably connected to the box through an adjusting device.

[0010] The regulating device is a demoulding rotary valve.

[0011] One end of the demoulding rotary valve is fixedly connected to the demoulding plate.

[0012] There are a plurality of demoulding rotary valves, and the plurality of demoulding rotary valves are evenly fixed on the demoulding plate from top to bottom.

[0013] The two side walls of the box body are provided with threaded holes matched with the demoulding rotary valve.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0015] The utility model is based on the simulation experiment of similar materials. By modifying the traditional model frame, it can quickly and safely remove the additional constraint force generated by the frame of the experimental device on the rock layer. Compared with the existing research methods, the utility model can meet the conditions of geometric similarity, physical similarity, motion similarity, and boundary similarity required by the field test, and effectively solves the problem that the traditional experimental device is cumbersome to remove constraints and has safety hazards, and opens up a new experimental simulation method. At the same time, the utility model is reusable and low-cost, which is convenient for the wide use and promotion of various geotechnical simulation laboratories. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model before the constraints are removed;

[0017] Figure 2 It is a schematic diagram of the structure of the utility model after removing the constraints;

[0018] In the figure: base 1, coal seam bottom plate 2, coal seam 3, rock layer 4, demoulding rotary valve 5, gap 6, demoulding plate 7, box body 8. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Generally, the components of the embodiment of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] like Figure 1-2 As shown, the utility model provides a simulation experiment device capable of removing boundary constraints, comprising a base 1, a hollow box 8 being arranged on the base 1, a coal seam bottom plate 2, a coal seam 3 and a plurality of rock layers 4 being arranged in sequence from bottom to top inside the box 8, stripping plates 7 being arranged on both sides of the box 8, the stripping plates 7 being movably connected to the box 8 through an adjusting device, the adjusting device being a stripping rotary valve 5, the number of the stripping rotary valves 5 being several, and one end of the plurality of stripping rotary valves 5 being fixedly connected to the stripping plate 7, threaded holes matching the stripping rotary valves 5 being arranged on both side walls of the box 8, the distance of the gap 6 between the stripping plate 7 and the inner side wall of the box 8 being adjustable by rotating the stripping rotary valve 5.

[0022] Before laying, the utility model rotates the demoulding rotary valve 5 to generate a gap 6 of a certain distance between the demoulding plate 7 and the inner wall of the box body 8, such as Figure 1 After the model is paved, the demoulding rotary valve 5 is rotated in the opposite direction to separate the demoulding plate 7 from the rock formation. Figure 2 As shown, at this time, both sides of the rock formation can be separated from the inner wall of the box body 8, removing the restraining force of the inner wall of the box body 8 on the rock formation.

Claims

1. A simulation experimental device capable of removing boundary constraints, comprising a base (1), characterized in that: The base (1) is provided with a hollow box (8), the interior of which is provided with a coal seam floor (2), a coal seam (3) and a plurality of rock layers (4) in sequence from bottom to top, and stripping plates (7) are provided on both sides of the interior of the box (8), and the stripping plates (7) are movably connected to the box (8) via an adjusting device.

2. The simulation experiment device capable of removing boundary constraints according to claim 1, characterized in that: The regulating device is a demoulding rotary valve (5).

3. The simulation experiment device capable of removing boundary constraints according to claim 2, characterized in that: One end of the demoulding rotary valve (5) is fixedly connected to the demoulding plate (7).

4. The simulation experiment device capable of removing boundary constraints according to claim 3, characterized in that: The number of the demoulding rotary valves (5) is several, and the several demoulding rotary valves (5) are evenly fixed on the demoulding plate (7) from top to bottom.

5. The simulation experiment device capable of removing boundary constraints according to claim 4, characterized in that: Threaded holes matching the demoulding rotary valve (5) are arranged on both side walls of the box body (8).

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