Modelling and Simulation of a Mining Machine Excavating Seabed Massive Sulfide Deposits

Dai, Yu; Chen, L. S.; Zhu, X.

doi:10.2507/ijsimm15(2)co10

Cited by 15 publications

(13 citation statements)

References 15 publications

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“…e three-dimensional discrete element method (3D DEM) was employed to study varieties of cutting force processes. It demonstrated that numerical results have a strong relevance with theoretical and experimental results [24,25]. However, crack propagation and chip separation were not obviously.…”

Section: Introductionmentioning

confidence: 85%

Experimental and Numerical Studies on Rock Cutting with Saw Blade and Conical Pick Combined Cutting Method

Zeng

Wang

et al. 2019

Mathematical Problems in Engineering

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In the rock cutting process, conical pick wear is often encountered. In order to restrain this condition, a saw blades and conical pick combined cutting method was put forward. Saw blades were employed to slit the rock for increasing the free surface, and then the conical pick was used to break the rock. To research the cutting performance of the new cutting method, the corresponding experimental device and a three-dimensional finite element model are established. In order to obtain crack propagation and fragment separation and to study the fracture process of the rock plate, a damage constative model and failure mechanism were combined in the numerical model. The mechanical tests were carried out to achieve the mechanical parameters of the rock. To investigate different parameters affecting rock plate cutting performance, experiments with different compressive strengths, physical parameters, and cutting depths were carried out. Moreover, the confining pressures affecting the cutting performance were adopted to simulate deep mining conditions. The experimental results demonstrated that the peak cutting force shows the exponential positive correlation with compressive strength, thickness of the rock plate, and cutting depth of the conical pick, and exhibits the exponential positive correlation with rock plate height and width. Besides, the numerical simulation results show that peak cutting force and confining pressure have a binomial relationship.

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Section: Introductionmentioning

confidence: 85%

Experimental and Numerical Studies on Rock Cutting with Saw Blade and Conical Pick Combined Cutting Method

Zeng

Wang

et al. 2019

Mathematical Problems in Engineering

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“…Table I lists the basic parameters of the gear pair, where the import power P is 10 kW, the driving gear rotate speed n 1 is 960 r/min, and the load factor K a is 1.526. 4 When the finite element model of the gear pair is established and transient analysis is performed, the stress distribution of the carburized gear pair in any position can be obtained at any moment [26,27]. The time-history (time-hist) curve of the maximum stress can be obtained by reading the maximum contact stress on the surface and the maximum equivalent stress on the tooth root of the carburized gear.…”

Section: Simulation Analysis and Discussionmentioning

confidence: 99%

Meshing Simulation and Strength Calculation of a Carburized Gear Pair

Li¹,

Zhang²,

Wnag³

2017

Int. j. simul. model.

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The material in the carburized layer of a carburized gear is nonlinear. However, no systematic theory and method is available to analyse the strength of nonlinear materials; thus, calculating the exact strength of carburized gears is difficult. The traditional method of calculating the strength of carburized gears considered the material as uniform, which is susceptible to make errors. To address this problem, a hierarchical simulation method was proposed to calculate the strength of carburized gears. The strength calculation principle of carburized gears was first analysed. Then, a solid modelling method of carburized gears was presented based on the extraction technology of the layered homogeneous material. Finally, the meshing process of carburized gears was simulated, and the distribution and variation laws of the root, contact, and shear stresses during the meshing process were determined accurately. Results show that the shear stress of carburized gears initially increases and then decreases along with depth direction, and the maximum value appears in the surface below. However, the shear stress of non-carburized gears decreases linearly. The equivalent stress of the two kinds of gears decreases linearly with depth direction, whereas the decreasing amplitude of the carburized gears is larger than that of the non-carburized gears. A significant error in the calculation of the strength of carburized gears can be clearly observed using the traditional method. By selecting the appropriate parameters, the method proposed in this study can be used to simulate the meshing process of the carburized gear pair and calculate its strength accurately.

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“…The numerical simulation method is used to simulate the bolt-shotcrete support structure of tunnel, and the maximum vertical displacement of the tunnel vault is calculated [14,15]. FLAC is the abbreviation of Fast Lagrangian Analysis of Continua, originated from fluid dynamics, and first applied in the field of solid mechanics by Willkins.…”

Section: Robustness Indexmentioning

confidence: 99%

Robust Optimization Design of Bolt-Shotcrete Support Structure in Tunnel

2018

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The uncertainty of rock and soil parameters is one of the key problems to limit the stability of tunnel support structure. Based on this, a robust optimization design method is proposed to reduce the sensitivity of support system to the uncertainty of rock and soil parameters. By defining the design parameters, noise factors and system response, a robust design system for bolt-shotcrete support structure is established. The non-dominant solutions of system robustness and support cost consist of the Pareto Front, then an knee point recognition method is designed to further filter all non-dominant solutions and determine the only optimal solution. The robust optimization design of the bolt-shotcrete support structure is carried out with a tunnel as the engineering background. The results show that the method can not only improve the stability and adaptability of the supporting structure, but also reduce the economic cost to the greatest extent, which provides a reference for the optimization design of other geotechnical engineering supporting structures.

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Modelling and Simulation of a Mining Machine Excavating Seabed Massive Sulfide Deposits

Cited by 15 publications

References 15 publications

Experimental and Numerical Studies on Rock Cutting with Saw Blade and Conical Pick Combined Cutting Method

Experimental and Numerical Studies on Rock Cutting with Saw Blade and Conical Pick Combined Cutting Method

Meshing Simulation and Strength Calculation of a Carburized Gear Pair

Robust Optimization Design of Bolt-Shotcrete Support Structure in Tunnel

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