<p>Designing and evaluating crown pillars are essential for safety, efficiency, and productivity in mining. Successfully integrating the crown pillar into the Wadi Saadah section is an important step that supports the mine’s success. This area is crucial because water can sometimes collect and seep into the rock, which improves the stability of the rocks below. To develop a stable and safe crown pillar, we must employ a combination of analytical, numerical, and empirical design methods. This approach enhances the reliability and performance of the crown pillar while ensuring its long-term safety. When checking the stability of a crown pillar, we should consider several key factors: the thickness and length of the ore body, the surrounding rock’s density, the ore body’s dip angle, the rock’s inherent strength, Poisson’s ratio, Young’s modulus, the friction angle, cohesion, and the existing in-situ stresses. Examining these factors helps us understand how to balance support provided by the crown pillar throughout the mine’s operational life. To ensure the mine’s safety and longevity, we should apply a safety factor of greater than 1.5 in the design concept. Moreover, numerical modeling has helped identify potential failure zones in the walls and roofs of excavated areas, leading to stronger, more reliable mining operations. An essential aspect of geotechnical considerations is the use of field measurements to validate and calibrate models. Numerical modeling results have been compared with field measurements, confirming that the convergence pins installed in the pillars result in minimal displacement.</p>

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Crown pillar design and stability at al Masane mine: Ensuring safety and excellence in Saudi Arabia’s mining industry

  • Daniel Mabeti

摘要

Designing and evaluating crown pillars are essential for safety, efficiency, and productivity in mining. Successfully integrating the crown pillar into the Wadi Saadah section is an important step that supports the mine’s success. This area is crucial because water can sometimes collect and seep into the rock, which improves the stability of the rocks below. To develop a stable and safe crown pillar, we must employ a combination of analytical, numerical, and empirical design methods. This approach enhances the reliability and performance of the crown pillar while ensuring its long-term safety. When checking the stability of a crown pillar, we should consider several key factors: the thickness and length of the ore body, the surrounding rock’s density, the ore body’s dip angle, the rock’s inherent strength, Poisson’s ratio, Young’s modulus, the friction angle, cohesion, and the existing in-situ stresses. Examining these factors helps us understand how to balance support provided by the crown pillar throughout the mine’s operational life. To ensure the mine’s safety and longevity, we should apply a safety factor of greater than 1.5 in the design concept. Moreover, numerical modeling has helped identify potential failure zones in the walls and roofs of excavated areas, leading to stronger, more reliable mining operations. An essential aspect of geotechnical considerations is the use of field measurements to validate and calibrate models. Numerical modeling results have been compared with field measurements, confirming that the convergence pins installed in the pillars result in minimal displacement.