The High Mining Height Faces Hydraulic Support Structure Stress Analysis

With the development of China’s coal mining technology, higher fully mechanized mining technology has been widely used in large modern mine. Large Mining Height Support as mechanized mining face of the core equipment, due to the complexity of its force, Poor working conditions, frequent phenomenon in the underground damage, seriously affect the safety and effective mining, Restrict the improvement of china economic efficiency.This paper is a ZY11000/28/63type to Xutuan mine7229working face with large mining height by the use of two leg shield hydraulic support as the object of study, combining the7229working face of mine of pressure, stent the oretical Mechanical Analysis, draw the force balance area. According to general technical manual hydraulic support, respectively loading maximum height and the height of hydraulic support, The top beam subjected to eccentric load is proposed and the two ends of the base load, top beam under torsion load and both ends of the base load and roof beam subjected to eccentric load and the base under torsion load three combined conditions as the analysis conditions of its. Using Pro/E to establish the model into ANSYS-Workbench, set the material parameters, a fixing bracket base, on the pad support top beam on the loading of the finite element analysis, draw stress and strain variation law of different conditions, different height of hydraulic support. Analysis of the position and damage form of hydraulic support risk interface, to optimize the structure of parts, the finite element analysis to optimize, results show that the support stress improved. This paper also analyzes the factors that influence the stability of the hydraulic support, the anti-skid measures support, combined with large mining height working face harsh environment, provides the reference for the improvement of large mining height hydraulic support.