Analysis on the Pose and Dynamic Response of Hydraulic Support under Dual Impact Loads

Abstract

Hydraulic support is significant in the mining process because it serves as the primary supporting equipment in a coal mine. The roof beam and shield beam of hydraulic support are easily damaged because of the dynamic impact loads it has to bear. To improve its working performance, this study investigated the movement trend, pose, and mechanical response of hydraulic support when its roof beam and shield beam were subjected to impact loads. First, the roof beam, shield beam, and bars were made flexible using Hypermesh software. Then, a numerical simulation model of the hydraulic support was constructed using Adams software. The working resistance of the support was provided by two active external load signals applied vertically to the roof beam and located above the upper column. The impact load was applied along the normal direction of the top beam and the shield beam toward the symmetrical centre. The pose and stress state variations of the support were obtained under different impact conditions through measuring the variations of the rotation angles of the roof beam, deflection angles of the columns, length of the columns and balanced jack, and force of the hinge points. Results indicate that various trends of the hydraulic support under different impact effects are different, and in general, the support is more easily damaged when the impact load acts both on the roof beam and the shield beam compared with the single impact condition. This study is helpful for the stability control and structural design of the hydraulic support.

Dynamic characteristics study on the two-stage safety valve used on hydraulic support under impact loading

“…The hydraulic support is often subjected to the impact loading caused by fracture and slump of the coal seam roof (Verma, 2013). There are two main types of impact loading: loading generated when immediate roof cracks and breaks, and impact loading generated by unbalanced pressure of the main roof occuring when the mining depth is increased (Zeng et al, 2018b). The transfer rule of the impact loading on the hydraulic support can be described as follows: the impact loading on the hydraulic support is transmitted from the coal seam roof (main roof or immediate roof) through the column circuit to the hydraulic support safety valve.…”

Force Transmission Analysis of Sliding Block-Type Hydraulic Support under Impact Loads

“…Meng et al established a mathematical model of load carrying performance of hydraulic support under various loads, and its distribution characteristics were analysed [7]. Zeng et al put up with a pose adjusting simulation model to monitor and control the pose of hydraulic support [8]. Zeng et al studied the load transfer characteristics of a two-legged support, and they analysed the impact effects of the hinge joints in hydraulic support under various impact loads [9].…”

Go-Kart Chassis Design Using Finite Element Analysis and Multibody Dynamic Simulation

“…Nowadays, vehicle dynamics simulations are combined with FEM analysis to include the effect of structural deformations during the dynamic simulation. Integrated multi-body / FEM analysis is also applied in fields as diverse as hydraulics [26,27] or measuring devices [28]. Zeng [26,27] analyses the effect of the bodies stiffness on the loads transmitted to the joints in a sliding block-type support implemented in ADAMS.…”