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<p>The effective disposal and stabilization of iron ore tailings (IOTs) are crucial for sustainable mining waste management, particularly in dry stacking. This study examines the hydromechanical properties of natural and cement-stabilized IOTs, focusing on molding conditions and moisture content. UCS, UPV, and permeability tests assessed their suitability for dry stacking. UCS tests showed that specimens compacted at optimum moisture content (OMC) with higher energy reached up to 2195&#xa0;kPa. UPV results indicated superior stiffness for dry-side compaction, with shear modulus (G<sub>0</sub>) exceeding 3000&#xa0;MPa. Permeability tests revealed reductions as low as 1.51 × 10⁻⁶ m/s for wet-side compaction with 3% cement, confirming its effectiveness for seepage control. While OMC compaction maximizes strength, wet-side compaction significantly reduces permeability, essential for fluid seepage control. This study underscores the need to balance strength and permeability in dry stacking design. When fluid migration control is critical, wetter compaction enhances performance by reducing voids and improving particle packing, leading to safer and more sustainable designs.</p>

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Hydromechanical Behavior of Cement-Stabilized Iron Ore Tailings

  • 期刊论文

  • 发表日期：

    2025年7月9日

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  • Giovani Jordi Bruschi,
  • Carolina Pereira dos Santos,
  • Aghileh Khajeh,
  • Camila da Silva Martinatto,
  • Luana Rutz Schulz,
  • Joao Paulo Sousa Silva,
  • Nilo Cesar Consoli

摘要

The effective disposal and stabilization of iron ore tailings (IOTs) are crucial for sustainable mining waste management, particularly in dry stacking. This study examines the hydromechanical properties of natural and cement-stabilized IOTs, focusing on molding conditions and moisture content. UCS, UPV, and permeability tests assessed their suitability for dry stacking. UCS tests showed that specimens compacted at optimum moisture content (OMC) with higher energy reached up to 2195 kPa. UPV results indicated superior stiffness for dry-side compaction, with shear modulus (G0) exceeding 3000 MPa. Permeability tests revealed reductions as low as 1.51 × 10⁻⁶ m/s for wet-side compaction with 3% cement, confirming its effectiveness for seepage control. While OMC compaction maximizes strength, wet-side compaction significantly reduces permeability, essential for fluid seepage control. This study underscores the need to balance strength and permeability in dry stacking design. When fluid migration control is critical, wetter compaction enhances performance by reducing voids and improving particle packing, leading to safer and more sustainable designs.