Coal mine fully mechanized mining support and surrounding rock relationship experimental platform

Abstract

The invention discloses an experimental platform for a relation between a mining fully-mechanized support and surrounding rocks. The experimental platform is used for researching an interaction relation between a hydraulic support in a mining fully-mechanized operating surface and the surrounding rocks. The platform comprises a loading experimental platform, a two-column shielding hydraulic support, a hydraulic loading system, a signal acquisition system and a data processing system, wherein the loading experimental platform comprises two experimental platform box body vertical grooves and a carrying bearing beam which is connected between the two experimental platform box body vertical grooves and used for paving an experiment material; and strain gauges are respectively embedded in different layers of the experiment material and used for monitoring the stress change of an overburden layer in a mining process. The experimental platform can load the overburden layer for complementing a ground stress. The two-column shielding hydraulic support is arranged on the operating surface and can perform real-time and on-line monitoring on loads of a top plate in the propelling process of the operating surface. The two-column shielding hydraulic support can realize high-frequency acquisition of support pressure signals and can monitor and record impact loads.

Description

technical field [0001] The invention relates to an experimental platform for the relationship between a fully mechanized mining support and surrounding rock in a coal mine, which is used for studying the interaction relationship between a hydraulic support and surrounding rock in a coal mine fully mechanized mining working face. Background technique [0002] The pressure caused by the breakage and movement of the roof of the coal mining face is a complex process. The hydraulic support is generally used to control the deformation and movement of the surrounding rock in the stope. Therefore, the relationship between the support and the surrounding rock of the coal mine comprehensive mechanized mining The core content of rock control. However, in the field, the roof load and mine pressure can only be estimated by observing the working resistance of the hydraulic support, and it is difficult to go deep into the surrounding rock to observe the dynamic process of the roof structur...

AI Technical Summary

Problems solved by technology

However, in the field, the roof load and mine pressure can only be estimated by observing the working resistance of the hydraulic support, and it is difficult to go deep into the surrounding rock to observe the dynamic process of the roof structure and structural instability.

Although some scholars have carried out similar simulation experiments and numerical calculations in the laboratory, the simulation and numerical calculation results can only reflect the movement and stress distribution of the stope rock formation, and cannot simulate the effect of the support on the surrounding rock, let alone determine the relationship between the support and the surrounding rock. dynamic balance relationship

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