Investigating the relationship between the chemical, physical, and mechanical properties of the iron blocks of Chagharat Mine, with the D50 value of the comminution resulting from blasting

Document Type : Research Article

Authors

1 Dept. of Mining Mechanical Engineering, Science and Research Branch, Islamic Azad University of Sirjan, Sirjan-Iran

2 Dept. of Mining Engineering, Shahid Bahonar University of Kerman, Iran

3 Dept. of Metallurgical and Materials Engineering, Yazd University, Yazd, Iran

Abstract

Blasting operation is one of the most important and costly operations in the mining process. Blasting is the beginning of the rock comminution system in the mine. The dimensions of the blasted product will play a significant role in the ability of stone crushing and grinding, for this reason, to produce a product with suitable dimensions, it is first necessary to obtain sufficient knowledge of the physical, mechanical, and chemical conditions of mineral blocks. In this research, by studying 26 iron ore blocks of the Chogharat mine, after the blasting operation, the physical, mechanical, and chemical characteristics of the ore blocks were taken. In the following, after blasting operation, by taking pictures from surface of the exploded block, an image analysis of the dimensions of blasting product was carried out. In the next step, stone samples were taken from the surface of the fired block to conduct geomechanical and chemical tests. After conducting the tests, the relationship between the physical, chemical, and mechanical characteristics of the tested stones with the dimensions of the Blast products (D50) was investigated. The characteristics examined in this study include uniaxial compressive strength, modulus of elasticity, Poisson's ratio, indirect tensile strength, cohesion, internal friction angle, and percentage of silica, iron, and iron oxide in the Blasted block. Finally, using univariate and multivariate linear regression statistical analysis, equations to estimate the dimensions of the product (D50) resulting from the blasting using the physical, mechanical, and chemical characteristics of the rock masses of the explosive product. With coefficients of determination (R2) 92.48% for D50 were predicted...

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References

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History

  • Receive Date: 30 June 2023
  • Revise Date: 29 February 2024
  • Accept Date: 05 May 2024

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