Shahrood University of Technology Journal of Mining and Environment 2251-8592 15 1 2024 01 01 Investigating Effect of Soil Grading Parameters on Tool Wear in Mechanized Tunneling using EPB-TBM Machine 301 321 2932 10.22044/jme.2023.13319.2447 EN Taha Ansari Faculty of mining engineering, Sahand University of Technology, Tabriz, Iran Hamid Chakeri Faculty of mining engineering, Sahand University of Technology, Tabriz, Iran Mohammad Darbor Faculty of mining engineering, Sahand University of Technology, Tabriz, Iran 0000-0001-7854-9077 Sadegh Amoun Faculty of mining engineering, Sahand University of Technology, Tabriz, Iran Hadi Shakeri Faculty of mining engineering, Sahand University of Technology, Tabriz, Iran Journal Article 2023 07 02 There is no acceptable method for investigating the tool wear phenomenon in soft grounds. In this article, first, a new equipment made at Sahand University of Technology is introduced, which is used for simulation of TBM tunneling mechanism. Next, the effect of various soil grading parameters such as D₁₀, D₃₀, and D₆₀ (which indicate the corresponding diameters on the soil grading diagram where 10, 30, and 60% of the grains are smaller than these values, respectively), coefficient of gradation, uniformity coefficient, sorting coefficient and effective size on the cutting tools wear. The initial studies show that in soils with fine grains greater than 10%, by increase in the values of D₁₀, D₃₀, D₆₀, and effective size, the tool wear increases. However, in soils with fine grains less than 10%, by increase in the above-mentioned parameters, the soil abrasiveness reduces. Also in soils with more than 10% fine grains, by increase in the coefficient of gradation value, the soil abrasiveness reduces. But in soils with fine grains less than 10%, by increase in the value of this parameter, the tool wear increases. The results of experiments show that sorting coefficient could be a good criterion for investigating the soil abrasiveness. https://jme.shahroodut.ac.ir/article_2932_cb32047ebe66a755efd92dd9dbb66d9c.pdf