Mining Technology: Transactions of the Institutions of Mining and Metallurgy最新文献

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Numerical investigation of temperature distribution on a tunnel boring machine disc cutter affected by geomechanically and excavation parameters 受地质力学和挖掘参数影响的隧道掘进机圆盘铣刀温度分布数值研究

Mining Technology: Transactions of the Institutions of Mining and Metallurgy Pub Date : 2024-01-22 DOI: 10.1177/25726668231222992

Mohammad-Hossein Motamedi, Mohsen Rahimi-Larki, Amir Arefian, Saeid Nikoosokhan

{"title":"Numerical investigation of temperature distribution on a tunnel boring machine disc cutter affected by geomechanically and excavation parameters","authors":"Mohammad-Hossein Motamedi, Mohsen Rahimi-Larki, Amir Arefian, Saeid Nikoosokhan","doi":"10.1177/25726668231222992","DOIUrl":"https://doi.org/10.1177/25726668231222992","url":null,"abstract":"This study focuses on the thermal behavior of tunnel boring machines (TBMs) through an in-depth investigation into the temperature distribution of their disc cutters. Utilizing the differential quadrature method (DQM), the research conducts a comprehensive numerical analysis to assess the impact of excavation and geological parameters on disc cutter temperature and wear. The accuracy of the DQM model is validated against the finite difference method (FDM), demonstrating comparative results with reduced computational requirements. The findings indicate a significant correlation between disc cutter temperature and various factors, such as rotational speed, spacing, geological conditions, and material strength. Notably, increased spacing or cutter speed leads to higher temperatures and accelerated cutter wear. Moreover, geological factors, particularly rock strength, influence friction coefficients, affecting disc cutter temperatures significantly. For instance, even a slight increase in cutter spacing results in a substantial 65% rise in cutter consumption, underscoring the relevance of these findings for life cycle assessment (LCA) evaluations across diverse geological and environmental conditions in TBM operations.","PeriodicalId":518351,"journal":{"name":"Mining Technology: Transactions of the Institutions of Mining and Metallurgy","volume":"30 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140531052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical analysis of dump slope stability using material properties obtained by parallel gradation method 利用平行分级法获得的材料特性对倾倒坡稳定性进行数值分析

Mining Technology: Transactions of the Institutions of Mining and Metallurgy Pub Date : 2024-01-22 DOI: 10.1177/25726668231222996

Eeswara Sai Chaitanya Kumar Rudra, Prudhvi Raju Gadepaka, Rajesh Rai, Ashok Jaiswal

{"title":"Numerical analysis of dump slope stability using material properties obtained by parallel gradation method","authors":"Eeswara Sai Chaitanya Kumar Rudra, Prudhvi Raju Gadepaka, Rajesh Rai, Ashok Jaiswal","doi":"10.1177/25726668231222996","DOIUrl":"https://doi.org/10.1177/25726668231222996","url":null,"abstract":"The stability of the dump slope depends on many parameters, mainly the shear strength of the dump material. Obtaining strength parameters of dump material is vital in dump stability analysis. Dump material consisting of particles of varying sizes, as large as 1000 mm, is typical. It is challenging to obtain the material strength properties of such large particles in the laboratory. Extrapolation of the material strength properties of the modelled samples prepared by parallel gradation technique is used to calculate the dump material strength properties in this study. A closer agreement is found between the predicted and calculated values of the angle of internal friction. Numerical modelling has been carried out with the obtained material properties using RS2 V9.0, a finite element package, to analyse the stability of a dump slope. It is observed from the results that FOS (factor of safety) increase with an increase in dmax (maximum particle size), keeping the shape of the PSD (particle size distribution) curve constant. The paper develops a slope stability analysis methodology considering particle size's effect on slope stability. The proposed method can be used for accuracy and reliable results for slope stability analysis.","PeriodicalId":518351,"journal":{"name":"Mining Technology: Transactions of the Institutions of Mining and Metallurgy","volume":"74 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140531045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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