A similar simulation system with an automatic support measuring roof pressure device

Abstract

The invention discloses a similar simulation system with an automatic supporting roof pressure measuring device. The similar simulation system comprises a coal mining simulation device and a hydraulic support simulation device which is arranged at the rear side of the coal mining simulation device. The hydraulic support simulation device comprises a floor (1), a roof (2), stress meters, a driving device and a damper (3). The top parts and the bottom parts of the stress meters are respectively connected with the roof (2) and the floor (1). The upper end of the damper (3) is connected with the rear end of the roof (2). The angle between the damper (3) and the roof (2) is an obtuse angle. The driving device drives the hydraulic support simulation device to move. According to the similar simulation system with the automatic supporting roof pressure measuring device, experiment accuracy can be enhanced so that work intensity can be greatly reduced and the experiment is enabled to be more intelligent.

Description

technical field [0001] The invention relates to the field of mining machinery, in particular to a similar simulation system with an automatic support measuring roof pressure device for simulating on-site coal mining. 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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