Influence of impact load form on dynamic response of chock-shield support

Abstract

Chock-shield support is usually used in undergroud coal mining to protect the roof. However, as the mining depth gets deeper, impact load that came from the roof becomes stronger and more frequent. This causes the support to bear a large number of dynamic loads, and reducing its reliability. To improve the support performance of the chock-shield support, the mixed-kinetic model was established using the mechanical-hydraulic co-simulation method. The load distribution law of the support joint under impact load form different stability forces, impact load amplitude, and impact frequency is discussed. The mechanical-hydraulic cooperative response of the chock-shield support are obtained. The results show that different joints show typical non-uniformity characteristic during the loading process. The proposed mechanical-hydraulic co-simulation method can more accurately obtain the dangerous points of hydraulic support reliability. The results of this study will help to improve the reliability of the chock-shield support.

Study on Working Characteristics of 4-Column Hydraulic Support in Lifting–Lowering–Moving State Based on Microcontact Theory and Rigid–Flexible–Mechanical–Hydraulic Coupling Simulation Model

“…Meng et al studied the load distribution law of a hydraulic support bearing points under an impact load. The results show that different hinge points show typical non-uniformity characteristics in the loading process, and the proposed mechanical-hydraulic coupling collaborative simulation method can more accurately obtain the hinge risk points of a hydraulic support [18]. Meng et al established a dynamic simulation model of a hydraulic support based on rigid-flexible coupling, and obtained the force transmission law of support nodes by applying impact loads to different positions on the top beam.…”

Study on the influence of pin shaft clearance on the bearing performance of the hydraulic support

“…For the sake of optimizing and improving the bearing capacity of hydraulic support, a great deal of research has been done on the structure and working characteristics of the hydraulic support by many scholars. Meng [16] et al studied the coupling response of the support under impact load through the machine-liquid coupling co-simulation technology, and pointed out that the front column is more sensitive to the impact load…”