A shock wave excitation device and method that affect the load-bearing deformation of filling materials due to mining

Abstract

The invention, which is suitable for the underground detection of coal mine, discloses a vibration wave excitation device and method for studying the influence on bearing deformation of a filling material by mining. The device comprises an axial loading device, a loading box and a vibration wave generating device. The loading box is used for placing a filling machine and fixing the vibration wavegenerating device and is arranged on an electro-hydraulic servo universal testing machine. The axial loading device carries out axial loading by the electro-hydraulic servo universal testing machine.The vibration wave generating device is used for generating a vibration wave and changing the vibration frequency of the filling material by using a variable-frequency variable-speed motor. The devicehaving a simple structure is easy to operate and is capable of striking the filling machine continuously to generate stable vibration waves; the bearing performance evolution law of the filling material under the influence of vibration can be tested accurately to provide the theoretical foundation for the filling material design and the bearing performance optimization under the deep coal mine disturbance; and the design and production of the deep-filled coal mining face can be guided well. The device and method have high practicality.

Description

technical field [0001] The invention relates to a shock wave excitation device and method, belonging to a shock wave excitation device and method used in coal mine underground detection, which is used for mining to affect the bearing deformation of filling materials. Background technique [0002] With the long-term continuous and high-intensity mining of shallow coal resources in my country and the gradual depletion of coal resources in the eastern region, the depth of coal mining has gradually increased, and deep mining will become the new normal in the development of the coal industry and resources. In deep resource mining, facing the hazards of high in-situ stress, high ground temperature, high karst water pressure, high gas and high-intensity disturbance, the potential catastrophic process is concentrated in the significant increase in the frequency and intensity of mine earthquakes, and the especially strong mine pressure in the stope. Solid filling coal mining technolo...

AI Technical Summary

Problems solved by technology

However, due to the significant changes in the deep mining environment, under the influence of frequent mine earthquakes, the filling material block will rotate, break, slip, etc., which will have a great impact on its bearing capacity. Theoretical and technical systems pose challenges

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