The design and analysis of a new slipper-type hydraulic support

Optimization design for SHPS is investigated in this paper. Through finite element analysis, SHPS with torsional load on the upper beam and base together is determined as the optimization object. The distance between the cross-section of the live column and the top end of the outer cylinder of the adjustment jack P1, the horizontal distance between axis of lug and rear linkage P2, and the angle P3 of the inclined ramp are chosen as the variable quantity, and the maximum von-Mises stress and maximum total deformation are chosen as evaluation indexes, the size range of each variable is defined in ANSYS WORKBENCH (AW). AW implements force analysis and Solidworks reconstructs the optimization object within the variable range. Two pieces of software jointly implement the continuous modeling and simulation automatically to achieve the 3 factors and 2 levels central composite design experiment of the optimization object. The simulation results after each model reconstruction are recorded in AW. The effects of three selected variables on evaluation indexes are studied and the optimum structure of SHPS is determined. Compared with the original design, the two evaluation indexes decreased by 2,37% and 2,40% respectively, which improves the supporting ability of SHPS efficiently.

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“…Hydraulic powered support is the main supporting equipment for underground mining [1]. As is shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Slider-Type Hydraulic Powered Support (SHPS) Using FEA and Response Surface Methodology

et al. 2020

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“…The hydraulic support is one of the important safety supporting equipment in the process of coal mining. [1][2][3] Its safety and reliability are very important for the safe mining of coal mines. In order to improve design quality, many researchers have carried out a lot of research on static strength [4][5][6][7] and dynamic behaviors [8][9][10] of hydraulic support.…”

Section: Introductionmentioning

confidence: 99%

Effects of boundary conditions on stress distribution of hydraulic support: A simulation and experimental study

Lin

Yang

et al. 2021

Advances in Mechanical Engineering

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This paper analyzed the effects of boundary conditions on the stress distribution of hydraulic support with the static finite element (FE) model. Five loading conditions are considered in this study, including: 1) canopy torsional loading, 2) canopy eccentric loading, 3) base torsional loading, 4) base diagonal loading, and 5) base symmetrical loading. In order to verify the simulation results obtained from the FE model, the corresponding experiments have also been performed. Based on the comparison between simulation and experimental results, the effects of pin-joint simplified methods and boundary conditions are evaluated in terms of accuracy and efficiency. Moreover, the new elastic-support boundary is also proposed to improve the simulation accuracy under conditions 2, 3, 4, and 5. The results show that bonded contact between the pin and shaft hole has high efficiency and accuracy compared with the frictional contact. The frictional contact boundary is reasonable under condition 1. However, the elastic-support boundary is suggested to be adopted to improve calculation accuracy for the stress distribution of the constraint components (canopy or base) under conditions 2, 3, 4, and 5.

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“…Most of the activities related to testing of powered roof supports concerns the selection of sections for mining and geological conditions [3,10,[18][19][20][31][32][33] and testing of the section operating parameters (mainly pressure in the legs) at static and dynamic load [3,16,34,35]. A number of publications also concern the study of section design [12,32,[36][37][38][39] and support control systems [12,36,40].…”

Section: Introductionmentioning

confidence: 99%

Tests of Geometry of the Powered Roof Support Section

Szurgacz¹,

Brodny

2019

Energies

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A powered roof support is a basic protection mean for longwall excavations in which highly efficient mining is carried out. The support operates properly when its individual sections are spragged correctly in a working and their operating parameters meet specific requirements. The geometry of the section, and in particular, the correct position of the floor base and the canopy, have a significant impact on the parameters and effectiveness of its work. Disturbances in this area, in many cases, are the cause of damage and improper operation of the support. Therefore, a new method of testing the position of the section in a longwall was developed based on an analysis of its geometry. The basis of this method are inclinometers (angle sensors) mounted on the main structural elements of the section. Recorded values of the angles of inclination of these elements and the developed analytical models are used to determine the positioning of the section in a longwall. The main purpose of the research was to develop a method that would allow, in the simplest possible way, the analysis of section geometry in real conditions. A simplified analytical model was used to determine the actual geometry of the section. It was used then as a basis of an analysis of possible states of the position of the section in the mining wall, including the surrounding rock mass. The results were applied during tests of the section carried out in a testing station and in real (underground) conditions. The developed measuring system helped to determine selected geometrical parameters of the section during these tests. The purpose of the research was to verify the developed model and demonstrate that the geometry of the section has a significant impact on its uneven loading. The obtained results, especially from underground tests, confirmed that during operation the support sections are twisted, which may cause overloading of their construction and disturbance of the operation process. The developed method of testing the geometry of the section is a new approach to analyzing the work of the powered roof support operating in variable mining and geological conditions. The developed method of testing the position of the section based on the angle of inclination of its individual elements is undoubtedly a new approach to this research area. The results obtained should be successfully used in practice to optimize the support section and when selecting support for specific working conditions.

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The design and analysis of a new slipper-type hydraulic support

Cited by 9 publications

References 25 publications

Optimization of Slider-Type Hydraulic Powered Support (SHPS) Using FEA and Response Surface Methodology

Optimization of Slider-Type Hydraulic Powered Support (SHPS) Using FEA and Response Surface Methodology

Effects of boundary conditions on stress distribution of hydraulic support: A simulation and experimental study

Tests of Geometry of the Powered Roof Support Section

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