Dimension and dip angle adjustable type coal mine stope similar model test system and method

Abstract

The invention relates to a dimension and dip angle adjustable type coal mine stope similar model test system and method. The system comprises a model bearing frame, a pressure loading device, a model frame rotating device, a centralized control device and a monitoring device, wherein the model bearing frame is used for laying a stope similar model; the centralized control device is used for sending a pressure application control instruction to the pressure loading device according to a pressure value set by the test and sending a rotation control instruction to the model frame rotating device according to a dip angle value set by the test; the pressure loading device is used for applying pressure to the model bearing frame according to the pressure application control instruction; the model frame rotating device is used for enabling the model bearing frame to rotate by the set dip angle according to the rotation control instruction; the monitoring device is used for monitoring the state of the stope similar model in an excavation process. With the adoption of the system provided by the invention, the pressure characteristics of a coal working face of different dip angles, different buried depths and different coal seam thicknesses of a coal mine site can be simulated in a laboratory.

Description

technical field [0001] The invention relates to the research field of stope mine pressure, in particular to a coal mine stope similarity model test system and method with adjustable size and inclination angle. Background technique [0002] Coal is China's main energy source and plays an important strategic role in the development of the national economy. At present, the mining depth of China's coal mines is increasing at a rate of 8m-12m per year, and the eastern mines are developing at a rate of 100m-250m every 10 years. With the gradual depletion of shallow coal resources, the mining depth of coal mines has gradually developed from the initial shallow part of 200m-300m to the deep part of 700m-800m, and the mining depth of some coal mines has reached more than 1000m. Depth, the problems faced by deep mining are becoming more and more prominent. Compared with shallow and middle-deep mining, the biggest difficulty in deep coal mine mining is the complex mechanical environm...

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Problems solved by technology

Furthermore, due to the small geometric scale, the test error will be amplified abnormally in the process of test result processing, reducing the similarity and credibility of the test results

In addition, the size of the existing stope rock pressure model test bench is relatively fixed, the model frame cannot be rotated or the rotation angle is insufficient, and it cannot simulate mining conditions such as high-inclination coal seam and pitched mining face

[0005] To sum up, the conventional stope model test bench lacks universal applicability to mining cases with different inclination angles, different thicknesses, and different buried depths. It is urgent to develop a universal, large-scale and high-precision stope model test system and test method with adjustable model size and inclination angle.

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