A top coal caving imitation coal flow gangue caving impact test system and its application

Abstract

The invention relates to a caving coal simulation coal flow coal gangue drop impact test system and application thereof. The system comprises a base, and a simulation coal flow drop device, a coal gangue conveying device, a coal shoveling device and multiple caving coal hydraulic support working groups arranged on the base, wherein the simulation coal flow drop device comprises a simulation mine pressure loading device, a coal flow withholding device and a hydraulic support adjusting and placing device arranged from top to bottom; the coal shoveling device is used for pushing coal gangue particles after the test to the coal gangue conveying device; the coal gangue conveying device is used for conveying the coal gangue particles to the simulation coal flow drop device, and sequentially, through the simulation mine pressure loading device and the coal flow withholding device, a simulation coal flow coal gangue drop impact test is carried out on the caving coal hydraulic support working groups. The caving coal simulation coal flow coal gangue drop impact test system can simulate the actual drop of the caving coal, in match with the real hydraulic support groups, real coal caving signals can be simulated in a small range, data for the caving coal drop test can be acquired effectively, and a scientific basis is provided for a caving coal gangue interface.

Description

technical field [0001] The invention relates to a top coal caving imitation coal flow coal gangue dropping impact test system and an application thereof, belonging to the technical field of coal gangue interface identification in top coal caving mining. Background technique [0002] Coal plays a dominant role in my country's energy resources, is related to the development of national industry and agriculture, and plays a pivotal role in the entire national economy. The development of coal mining technology is an important measure to increase the rate of coal mining and an important means to increase coal production. At the same time, the automation of coal mining is conducive to improving the working conditions of workers, reducing personal casualties and improving labor production efficiency. Thick coal seams account for about 44.8% of my country's total coal reserves, and a considerable part of the nearly 3 billion tons of coal each year is mined by top-coal caving. There...

AI Technical Summary

Problems solved by technology

In recent years, some domestic scholars have carried out the research on the identification method of coal-gangue interface based on the vibration signal of the tail beam, and achieved very effective results. Through signal processing and feature extraction, the coal-gangue interface can be more accurately identified in the laboratory. , but there is still a big gap from the actual engineering application, and the identification method is not perfect

At the same time, due to the lack of relevant theories, the theoretical development of coal gangue identification in caving mining based on data analysis and the practical application of coal gangue identification technology are seriously restricted.

In order to clearly understand the essential cause of signal generation and the real propagation law under various field conditions, it is necessary to conduct quantitative analysis on the vibration characteristics when rock and coal impact the tail beam during the research process, but there is a lack of reasonable experimental equipment at this stage. To verify and assist research

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