Similar material simulation test system

Abstract

The invention discloses a similar material simulation test system and relates to an apparatus for measuring or testing force, stress and displacement, in particular to a test system for laboratories to simulate and monitor support load and displacement changes by the aid of similar materials during coal bed excavation. The similar material simulation test system is capable of obtaining real-time pressure and displacement of a support when the support interacts with surrounding rocks. The similar material simulation test system comprises a model support 1, at least one movable column 2, pistons 21, vertical columns 3, a first measuring cylinder 5, a second measuring cylinder 6, a radio-frequency capacitive liquid level transmitter 8 and a radio-frequency capacitive liquid level transmitter 9. The insides of the vertical columns 3 are mutually communicated to form a liquid accommodating cavity 4, liquid is arranged in the liquid accommodating cavity, the first measuring cylinder and the second measuring cylinder are higher than the pistons, a connecting tube 7 is communicated between the first measuring cylinder and the second measuring cylinder through side walls of the first measuring cylinder and the second measuring cylinder, the lower end of the first measuring cylinder is communicated with the liquid accommodating cavity 4 through a hose 41, and the two radio-frequency capacitive liquid level transmitter 8 and 9 are used for measuring the liquid level inside the two measuring cylinders.

Description

technical field [0001] The invention relates to an instrument for measuring or testing force, stress and displacement, in particular to a test system for a laboratory which utilizes similar materials to simulate and monitor support load and displacement changes during coal seam excavation. Background technique [0002] At present, during coal seam excavation, supports are often used to support the roof and floor of the coal seam in order to provide a safe recovery space, and whether the support can adapt to the geological conditions becomes the key to the safe recovery of the working face. In order to use the similarity principle to simulate the loading situation of the actual support, there is a traditional similar material simulation test support used in the laboratory, and the adaptability and selection of the support are judged according to the results of the simulation test. For example, the application number is 00226585.0, the publication number is CN2430746, and the ...

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Problems solved by technology

For example, the application number is 00226585.0, the publication number is CN2430746, and the publication date is a Chinese utility model patent on May 16, 2001, which discloses a three-dimensional simulation experiment bracket of similar materials, but the test system constituted by this bracket, its measured The pressure value is a fixed value when the bracket is fixed, and it cannot fully reflect the interaction process between the bracket and the surrounding rock, because the actual bracket will be displaced when it is loaded, and the experimental bracket is fixed and inactive. The test system cannot Continuously obtain the real-time pressure and displacement of the support when the support interacts with the surrounding rock, so it is not convenient to provide a reliable reference for the adaptability and selection of the support

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