Study On The Design And Dynamic Characteristics Of Hydraulic Combination Support In Fully Mechanized Roadway

At present,the advanced supporting equipment of integrated excavation roadway in China is mostly the stepping self-moving hydraulic support.Due to the poor geological conditions of most coal mines in Huaibei Bureau,such as easily broken roof,the driving speed is slow,the traditional stepping self-moving hydraulic support is no longer suitable for this type of roadway.Therefore,this thesis innovates hydraulic combination support in order to solve the above problems.The main research content of this thesis is as follows:(1)According to the conditions of the roadway,and the advance support needs of the roof of the integrated excavation roadway,the support structure was designed.The overall structure and main parameters were determined through analysis and calculation,and a hydraulic combination support was modeled by SOLIDWORKS.(2)The dynamic model of hydraulic unit support is established and the differential equation and energy expression of each component are obtained.The dynamic model of coupling state between hydraulic unit support and roof is established and the differential equation of roof beam of support is obtained.Using ANSYS Workbench software,the transient dynamics simulation was carried out by selecting different positions of the unit support.The simulation results show that the structural strength of the top beam conforms to the specification of the hydraulic support.(3)By establishing the mechanical model of the support of hydraulic unit and analyzing the force,the moment balance equation and equations were obtained.The critical states of the support tipping and sliding along the working face strike and inclination direction were analyzed theoretically.The critical instability simulation model of hydraulic unit support was established by ADAMS/View,the numerical solution of critical instability Angle of support was obtained by simulation.(4)The mechanical test platform of hydraulic unit support prototype was built.According to different working conditions,and the dynamic characteristics of the unit support and the roof were studied and analyzed.The experimental results were compared with the theoretical research results,and the theoretical research results were finally improved.There are 66 figures,17 tables and 93 references in this thesis.