Automatic coal-cutting stimulation system for analog simulation experiment

Abstract

The invention discloses an automatic coal-cutting stimulation system for an analog simulation experiment, which comprises a coal-cutting simulation device and a hydraulic support simulation device arranged at the rear side of the coal-cutting simulation device, wherein the hydraulic support simulation device comprises a bottom plate (1), a top plate (2), a stress meter, a drive device and a baffle (3), wherein the top part and the bottom part of the stress meter are respectively connected with the top plate (2) and the bottom plate (1); the upper end of the baffle (3) is connected with the rear end of the top plate (2), and the angle between the baffle (3) and the top plate (2) is an obtuse angle; the drive device is used for driving the hydraulic support simulation device to move; the angle between the top plate (2) and the horizontal plane is 3 degrees; the rear end of the top plate (2) is higher than the front end of the top plate (2); and the angle between the baffle (3) and the top plate (2) is 150 degrees. The automatic coal-cutting stimulation system for an analog simulation experiment disclosed by the invention can improve the experiment accuracy and enable the experiment to be more intelligentized.

Description

technical field [0001] The invention relates to the field of mining machinery, in particular to an automatic coal cutting simulation system for simulating field coal mining and used for similar simulation experiments. Background technique [0002] Similar simulation models and devices are used to simulate the excavation process of underground coal seams. By simulating the changes of the coal seam and the rock above the coal seam manually excavated, the changes of the coal seam roof strata during the actual excavation process are estimated, so it is called the similar model. [0003] But there is following defective in the similar model in the prior art: [0004] First of all, the excavation process is manual excavation with thin iron rods. Generally, a certain distance of coal seam (such as about 50mm) is excavated every two hours. Similarity ratio, which means that the coal is pushed forward 5m at a time, which is unscientific), that is, it is excavated at a certain speed,...

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Problems solved by technology

[0004] First of all, the excavation process is manual excavation with thin iron rods. Generally, a certain distance of coal seam (such as about 50mm) is excavated every two hours. Similarity ratio, which means that the coal is pushed forward 5m at a time, which is unscientific), that is, it is excavated at a certain speed, and generally a model needs more than three days and three nights of continuous excavation, which requires the experimenters At night, it needs to be excavated every two hours. An experiment generally requires 3-5 excavators. The workload is very heavy and it is very inconvenient.

[0005] Second, when excavating, because the similar model device is generally 300mm wide, the model in the middle part is relatively hard and cannot be seen clearly, and often digs the wrong roof or bottom plate, etc., which has a great impact on the results of the experiment

[0006] Third, sometimes the model is relatively hard, and it takes a lot of force to dig it out. In the middle part of the model, it even needs to be tapped to move it. This kind of vibration, knocking or unconscious contact with the top plate is equivalent to The impact of large rock burst, so it has a great influence on the results of some experiments on the roof structure

[0007] Finally, the similar simulation mainly studies the stress characteristics of the roof and floor, the collapse characteristics of the roof, etc., but there is no simulation device that can simulate the working face stope support simulation device and its migration and stress monitoring system and method. For the similar simulation experiment The results have a greater impact

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