Analysis On Characteristics Of Non-repeated Temporary Support Equipment In Fully Mechanized Roadway

With the acceleration of the advancing speed of the fully mechanized coal face in China,the speed of the comprehensive mechanized coal roadway has become an important factor restricting the production capacity of the face.However,there are many problems in coal mine,such as slow speed of excavation and support,repeated support,poor safety and low efficiency,which seriously restrict the needs of coal mining.In order to solve the problem of rapid excavation and repeated support for temporary roadway support,this paper proposes a non-repetitive temporary support equipment for integrated roadway,and takes this equipment as the research object,proposes support ideas for the problem,introduces the working principle and structural design of non-repetitive temporary support,and uses ANSYS to carry out static and dynamic analysis on the unit.The modal analysis of the unit support and the lead part is carried out.The main work of this paper is as follows:1.This paper expounds the subject background of this paper and the practical problems and situations faced by the current construction of the integrated excavation working face,introduces in detail the research status of the equipment and technology of the advanced support of the integrated excavation roadway at home and abroad,as well as the research status of the development of the temporary support theory,analyzes and summarizes the existing research,and puts forward the research objectives and main contents of this paper.2.According to the actual situation,the working principle of the non-repetitive temporary support equipment and the design structure and ideas of each part of the equipment are elaborated.Aiming at the problem of roadway repeated support,the idea of temporary support is put forward,and the working principle of non-repeated temporary support and the structural design of key parts are introduced,including the stability design of the supporting hydraulic cylinder in the advance part of nonrepeated temporary support.3.The force analysis model of the main part of the temporary support is established,and the displacement and deformation of the longitudinal beam and beam of the support are respectively analyzed according to the singular function method,and then the mechanical analysis of the support is carried out through the software to analyze the stress of the longitudinal and beam in detail.The simplified dynamic model of the support was established,and the vertical motion differential equation of the support was derived.The differential equation was solved,and the velocity and acceleration curves of the vertical direction with damping and without damping were obtained.4.Establish the force analysis model of the advanced part of the temporary support,infer the longitudinal beam based on other deformation,analyze the detailed deformation and strain of each vertical and horizontal beam,and carry out modal analysis of the support,to ensure that the support will not occur resonance during work.5.The DM-YB180 B dynamic and static resistance strain gauge and software were used to measure the strain of the support beam and longitudinal beam.The experimental data showed that the beam strain of the support was significantly less than that of the longitudinal beam.Similarly,the strain values at the center of the support are also relatively large,and the values at the other monitoring points on the beam are basically consistent with the numerical analysis results.Fig.[73] Table[4] parameter[103]...