Three-dimensional physical model Mining settlement Adaptive mechanical environment Sealed uniform loading device

Abstract

The invention discloses a sealed and uniformly distributed mining settlement adaptive loading device for a mechanical environment of a three-dimensional physical model. The device comprises an electro-hydraulic servo hydraulic transmission system, a flexible combination type multi-stage loading system, a full-automatic program control system, a monitoring system and a data processing and feedback system, wherein the electro-hydraulic servo hydraulic transmission system, the full-automatic program control system, the monitoring system and the data processing and feedback system are connected through a power line; the electro-hydraulic servo hydraulic transmission system comprises an electro-hydraulic servo oil cylinder, a servo motor, a servo oil pump, an electro-hydraulic servo overflow valve and an electro-hydraulic servo reversing valve; the flexible combination type multi-stage loading system comprises a rigid connection force transmission push head, a multi-scale dense combination type spring, a high-ductility rubber plate and a retractable rubber enclosure. Through organic combination of the rigid push head, the combined spring and ultra-flexible rubber, uniform distribution of load in a contact surface is realized, meanwhile, the requirement for continuous loading at a settlement position of the model is met, and the mechanical environment of a three-dimensional physical analog simulation experiment is closer to reality.

Description

technical field [0001] The invention relates to a three-dimensional physical model mining settlement adaptive mechanical environment sealing and uniform loading device. Background technique [0002] At present, the three-dimensional physical similarity simulation experiment of coal seam mining overlying rock crack evolution is carried out in the laboratory, and most of the loading methods are rigid loading, that is, using a whole steel plate or iron brick to apply an axial load to the model. This loading method has the following disadvantages: [0003] (1) It is impossible to guarantee that exactly the same load is applied to each point of the contact surface; [0004] (2) There is no synchronous loading on the surface subsidence after the overlying rock collapses in coal seam mining. Due to the existence of these two problems, the mechanical environment of the experimental model is quite different from the actual one. Contents of the invention [0005] In order to solv...

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Problems solved by technology

[0003] (1) It is impossible to guarantee that exactly the same load is applied to each point of the contact surface;

[0004] (2) There is no synchronous loading on the surface settlement after the overlying rock collapses in coal seam mining

Due to the existence of these two problems, the mechanical environment of the experimental model is quite different from the actual situation.

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