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

Lin, Junzhe; Yang, Tao; Ni, K.; Han, Chenyi; Ma, Hui; Gao, Ang; Xiao, Chunliang

doi:10.1177/16878140211001194

Cited by 7 publications

(5 citation statements)

References 22 publications

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“…This testing process is well reproduced in the numerical simulation [18]. Lin et al [19] conducted a static simulation and experiment on a hydraulic support, by changing the contact mode between the pin and shaft hole, the effects of the boundary conditions on the stress distribution are discussed. He concluded that the bonded contact mode is the best way to simulate the experiment results.…”

Section: Introductionmentioning

confidence: 74%

Investigation of Dynamic Behaviour of Four-Leg Hydraulic Support under Double-Impact Load

Xie¹,

Zeng²,

Jiang³

et al. 2022

sv-jme

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Hydraulic support is the key support equipment for underground coal mining. The frequent impact load during the mining process easily causes damage to the hinge joints and reduces the stability of the hydraulic support. To improve the stability of the hydraulic support, a rigid-flexible coupling numerical model of the support has been developed. The validity of the model is verified through the static loading test. Next, the impact loading test of the hydraulic support is carried out. The force response characteristics of the hinge joints and the vibration response characteristics of the leg system are discussed when both the canopy and goaf shield bear impact load. The results indicate that when only the canopy bears the impact load, the hinge joint of the front leg is the most sensitive (up to 139.4 %). When the impact load acts both on the canopy and goaf shield, the dynamic response of each hinge joint of the hydraulic support (except the rear leg) reaches the peak value. With the backward movement of the impact load on the goaf shield, the hinge joint force presents different pressure-relief characteristics.

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Section: Introductionmentioning

confidence: 74%

Investigation of Dynamic Behaviour of Four-Leg Hydraulic Support under Double-Impact Load

Xie¹,

Zeng²,

Jiang³

et al. 2022

sv-jme

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“…Meanwhile the mining height of the working face is also getting higher. These all cause the support to bear a large number of dynamic loads and reducing its reliability [8,12,22,27].…”

Section: Eksploatacja I Niezawodnosc -Maintenance and Reliabilitymentioning

confidence: 99%

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

Meng¹,

Ma²,

Xie³

2023

Eksploatacja i Niezawodność – Maintenance and Reliability

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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.

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“…When the basic roof breaks or gangue falls, the canopy will be affected by the impact load, resulting in the canopy being overloaded or unevenly loaded. In this case, the pin shaft at the canopy hinge often deforms, wears, and even breaks to varying degrees [5][6][7], which has a serious impact on the stable support of hydraulic support and underground safety operation.…”

Section: Introductionmentioning

confidence: 99%

Research on Dynamic Characteristics of Canopy and Column of Hydraulic Support under Impact Load

Zeng

Wan

et al. 2022

Energies

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In the process of coal mining, the canopy and column play an important role in the safety support of hydraulic support. However, due to the complex and changeable coal seam conditions, the hydraulic support is significantly affected by the impact load. This paper aims to reveal the dynamic characteristics of canopy and column under impact load. Firstly, the dynamic model of hydraulic support is established, and the impact response of each hinge point of the canopy is analyzed. Secondly, based on the fluid–structure interaction (FSI) theory, the two-way FSI model of the column is established, and the structural change of the column and the flow field characteristics in the cylinder under the impact load are analyzed. The results show that the front column hinge is more prone to impact failure under impact load. The impact load has a significant impact on the two-level cylinder, the pressure in the cylinder increases, and an eddy current occurs on both sides of the bottom of the cylinder. The research results can provide references for the structural optimization of the hydraulic support with anti-impact load and the strength design of the column.

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

Cited by 7 publications

References 22 publications

Investigation of Dynamic Behaviour of Four-Leg Hydraulic Support under Double-Impact Load

Investigation of Dynamic Behaviour of Four-Leg Hydraulic Support under Double-Impact Load

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

Research on Dynamic Characteristics of Canopy and Column of Hydraulic Support under Impact Load

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