Study On Stability Strategy And Control Technology Of Hydraulic Support With Large Inclined Angle

The situation of the hydraulic support of the fully mechanized coal mining face is affected by the reliability of the control system due to the coal seam condition and the structural part of the bracket itself. There are some problems such as dumping,slipping and skewing, which seriously affect the efficiency of coal mining face. In this paper, the stability of hydraulic support under heavy dip angle is studied from the aspects of strata behavior, top coal migration characteristics, support force state,support hydraulic control system reliability and working face layout, in order to improve the adaptability of the hydraulic support of the fully mechanized top coal caving face to the coal and rock, and realize the high yield and high efficiency of the fully mechanized top coal caving face, and has wide application prospect and popularization and application value.Firstly, according to the complicated working conditions of the large dip angle face, the paper established the coupling control model of the coal mining face and the coal-rock coupling control model, discussed the coupling characteristics and adaptability of the hydraulic support and the coal and rock in the fully mechanized top coal caving face and putted forward the coal-rock coupling stability control strategy of working face supporting equipment; then, according to the instability factors of the supporting equipment in the steeply inclined coal seam, the paper established the mechanism model of the hydraulic support dumping and falling,analyzed the pouring and falling mechanism of the fully mechanized top-coal caving face in the fully mechanized top-coal caving face, and putted forward the control strategy of the dumping stability of the fully mechanized top coal caving mining equipment in the inclined coal seam; meanwhile, the paper established the joint simulation model of the brackets using the ADAMS and EASY5 simulation platforms, verified the dynamic characteristics of the hydraulic control system of the hydraulic support in the various working cycles and the stability of the hydraulic control system, in order to put forward the stability control method based on the simulation of machine fluid integration; finally, the paper putted forward the horizontal and longitudinal stability control strategies of fully mechanized top coal caving mining face in inclined coal seam face from the two aspects of the overall structure of the supporting equipment and the working face, designed the anti-fall and anti-skid device for hydraulic support of fully mechanized top coal caving in inclined seam, at the same time, it is reasonable to optimize the coal mining technology in the fully mechanized top coal caving mining face in the inclined coal seam, arrange the roadway layout and the coal caving process in the large inclined working face reasonably,and comprehensively improve the stability of the hydraulic support in the fully mechanized top coal caving face.This study is applicable to the instability control strategy of the fully mechanized coal mining face in steeply inclined coal seam, which can solve the technical problems such as poor stability of the supporting equipment, slow moving frame, poor rock control and so on; In this paper, the stability of the coal-rock coupling system and the mechanical-liquid system is studied to improve the adaptability of the fully mechanized coal mining face to the coal and rock; The research results can reduce the hydraulic support due to the lack of working angle and the stability of the support structure Instability, and improve the supporting effect of the surrounding rock in the fully mechanized coal mining face.