Buffer system for impact ground pressure resisting of hydraulic support, and application thereof

Abstract

The invention relates to a buffer system for impact ground pressure resisting of a hydraulic support, and application thereof. The buffer system comprises a vertical column. The vertical column comprises a movable column, a middle oil cylinder, a bottom oil cylinder and an anti-impact buffer which are sequentially connected. The anti-impact buffer is provided with a pressure sensor and a controller which are connected. The controller is further electrically connected with a magnetorheological coil in the anti-impact buffer. Pressure information is collected by the pressure sensor, the currentof the magnetorheological coil is adjusted in real time and connected and disconnected by the controller, and thus the impact ground pressure applied to the vertical column is buffered by the anti-impact buffer in an assisted mode. The buffer system for impact ground pressure resisting can be conveniently integrated on an existing hydraulic support structure and is conveniently mounted to be matched with the existing hydraulic support for using; and the traditional single mode of pressure relieving through a large-flow safety valve is changed, after the buffer system is adopted, the buffer pressure relieving process of the vertical column can be effectively protected, meanwhile, reliability during impact ground pressure resisting of the hydraulic support is improved, and it is ensured thatthe hydraulic support works safely and effectively.

Description

technical field [0001] The invention relates to a shock-resistant rock pressure buffer system for a hydraulic support and an application thereof, belonging to the technical field of mine support. Background technique [0002] With the increase of mining depth and mining intensity of coal resources, dynamic disasters such as rock burst in mines are becoming more and more serious, which seriously threatens the safety of coal mining. Rockburst refers to the dynamic phenomenon of sudden and violent destruction due to the instantaneous release of elastic deformation energy of the rock mass around the shaft or working face, often accompanied by coal and rock throwing, loud noise and air waves. [0003] Statistical analysis shows that there are reports of rock bursts in various types of mines, and rock bursts have occurred in all types of coal seams. , sandstone, limestone, and kerogen shale roofs have all experienced rock bursts. Coal mine rock burst not only has a great degree ...

AI Technical Summary

Problems solved by technology

[0009] 1. The support cannot actively adjust and respond to the pressure intensity and strength of the rock burst

[0010] 2. The installation of a buffer structure on the column body has affected the original bracket and column structure, increasing the complexity of the manufacturing process and production costs;

Due to the short duration of the rock burst, the duration of the rock burst process is several seconds to tens of seconds, but the maximum impact load lasts only a few milliseconds to tens of milliseconds, which often leads to a large The flow safety valve could not respond in time, which caused problems such as column bending, breaking, and cylinder explosion, which seriously affected production safety

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