Investigation and modernization of buckets of surface mining machines

Rusiński, E.; Cegiel, Lesław; Michalczyk, A.; Moczko, P.; Olejarz, J.; Pietrusiak, Damian

doi:10.1016/j.engstruct.2015.02.009

Cited by 21 publications

(11 citation statements)

References 7 publications

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“…Most papers which can be found in domestic and international research are about reconstruction and revitalization of mining equipment without taking the economic effects of the reconstruction and revitalization of equipment into account [9][10] [11]. Research on the economic effects of equipment maintenance on opencast coal mines, as well as the economic and financial effects of reconstruction and revitalization and the risk of investment are extremely rare [12]. There's mostly individual research in the field of investment risk, hence it's obvious that more research in this area is necessary [13] After this disaster, five continuous mining systems were flooded on Tamnava-West Field: systems for overburden, coal and interburden (Fig.…”

Section: Tamnava-west Field Flooded Equipment Risk Analysismentioning

confidence: 99%

Risk assessment of flooded equipment revitalization on opencast coal mine Tamnava-West Field

et al. 2022

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Unprecedented floods in 2014 caused huge consequences on Serbian lignite opencast mines, such as halt of coal production and damages of the mining equipment. Three equipment revitalization options were urgently assessed to continue with coal production on opencast mine Tamnava-West Field. This paper compares the economic risks of the three investment options for lignite mine Tamnava-West Field mining equipment revitalization, based on this experience and probable risk of a repeated event. The results of the detailed quantitative risk analysis should verify the urgent decision and ranked with a multiple-criteria decision analysis.

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Section: Tamnava-west Field Flooded Equipment Risk Analysismentioning

confidence: 99%

Risk assessment of flooded equipment revitalization on opencast coal mine Tamnava-West Field

et al. 2022

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“…The most widely utilised item of off-highway plant is the tracked hydraulic 360° excavator (as defined in ISO7135 (ISO, 2009)). This machine can operate across diverse working environments including demolition (Abudayyeh et al , 1998; Pun et al , 2006; Coelho and de Brito, 2011; Shaurette, 2015); quarrying, mining and minerals extraction (Chanda and Gardiner 2010; Tiwari et al , 2013; Rusinski et al , 2015; Kozan and Liu, 2016); forestry (Nakagawa et al , 2010); agriculture (Qin et al , 2015); and construction and highways (Hola and Schabowicz, 2010; Hajji and Lewis, 2013; Wang et al , 2016). The excavator’s widespread appeal stems from its inherent versatility which is achieved via hydraulic implementation lines that enable various types of attachment to be fitted to the machine’s dipper (or stick).…”

Section: Introductionmentioning

confidence: 99%

Risk of excavators overturning

Edwards

Pärn

Sing

et al. 2019

ECAM

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Tracked hydraulic excavators are versatile and ubiquitous items of off-highway plant and machinery that are utilised throughout the construction industry. Each year a significant number of excavators overturn whilst conducting a lifting operation, causing damage to property, personnel injury or even fatality. The reasons for the overturn are myriad, including: operational or environmental conditions; machine operator acts or omissions; and/ or inadequate site supervision. Furthermore, the safe working load (SWL) figure obtained from manufacturer guidance and utilised in lift plans is based upon undertaking a static load only. This research seeks to determine whether the SWL is still safe to be used in a lift plan when slewing a freely suspended (dynamic) load, and if not, whether this may be a further contributory factor to overturn incidents. Approach: Previous research has developed a number of machine stability test regimes but these were largely subjective, impractical to replicate and failed to accurately measure the 'dynamic' horizontal centrifugal force resulting from slewing the load. This research contributes towards resolving the stability problem by critically evaluating existing governing standards and legislation, investigating case studies of excavator overturn and simulating the dynamic effects of an excavator when slewing a freely suspended load at high rotations per minute (rpm). To achieve this, both the static load and horizontal centrifugal force from slewing this load were calculated for six randomly selected cases of an excavator, with different arm geometry configurations. Findings: The results from the six cases are presented and a worked example of one is detailed to demonstrate how the results were derived. The findings reveal that the SWL quoted on an excavator's lift rating chart considerably underestimates the extra forces experienced by the machine when an additional dynamic load is added to the static load whilst lifting and slewing a freely suspended load. Originality: This work presents the first attempt to accurately model excavator stability by taking consideration of the dynamic forces caused by slewing a freely suspended load and will lead to changes in the way that industry develops and manages lift plans. Future research proposes to: vary the weight of load, arm geometry and rpm to predict machine stability characteristics under various operational conditions; and exploit this modelling data to populate pre-programmed sensor based technology to monitor stability in real time and automatically restrict lift mode operations.

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“…e digging operation using an excavator bucket is a typical and complex soil-bucket interaction process, in which the loads acting on the bucket are uncertain and the stresses in the bucket material are variable due to a constantly changing environment. e traditional deterministic design method takes no account of these uncertainties in loading condition and calculates the design loads under limiting working condition according to the theoretical or empirical load model [1][2][3][4]. us, the highstrength structures are designed at the expense of increased structure weight.…”

Section: Introductionmentioning

confidence: 99%

“…e work of Qiu et al [2] still belongs to the field of ultimate strength design. Rusinski et al [3] conducted the research on the investigation and modernization of buckets of surface mining machines and presented an approach to consider the test results in real mining conditions as well as the numerical analysis results of modern numerical tools that support the bucket structure design in the process of bucket structure optimization. e existing researches on the bucket structure design mainly focus on ultimate strength design based on the deterministic limiting loads.…”

Section: Introductionmentioning

confidence: 99%

Lightweight and High‐Strength Design of an Excavator Bucket under Uncertain Loading

Pang

Zou

et al. 2019

Mathematical Problems in Engineering

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This paper presents a methodology for lightweight and high-strength design of an excavator bucket under uncertain loading. Uncertain loads are obtained by using the Monte Carlo simulation based on the existing soil-bucket interaction model in which the soil parameters are variable. And the well-known 3-sigma methodology is used for the quantification of the uncertain loads. Excavator bucket modelling is finished by using ANSYS Parameter Design Language (APDL). A multiobjective optimization model aiming to decrease the maximum von Mises stress and to reduce the weight of the bucket is established on the foundations of the uncertain load and the parametric geometry model. The structural shape and topology of the bucket are then designed by using the mixed variable genetic algorithm to solve the established optimization problem. The results show that the presented method can be effectively and efficiently applied for the optimization design of the excavator bucket and that the optimized bucket signifies obvious decreases in the weight and the stress compared with the initial reference model. The proposed methodology for structure optimization design considering uncertain loads not only provides the technical means for the design and development of high-performance bucket but also lays a preliminary theoretical foundation for the optimization design integrated machine-environment interaction.

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Investigation and modernization of buckets of surface mining machines

Cited by 21 publications

References 7 publications

Risk assessment of flooded equipment revitalization on opencast coal mine Tamnava-West Field

Risk assessment of flooded equipment revitalization on opencast coal mine Tamnava-West Field

Risk of excavators overturning

Lightweight and High‐Strength Design of an Excavator Bucket under Uncertain Loading

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