Scholarlink

<p>This study presents a comprehensive engineering-geological assessment of the Darrehzar copper concentration plant site, situated in southern Central Iran within the Urmia–Dokhtar volcanic belt. Fifteen exploratory boreholes of varying depths were drilled, and data from boreholes BH6, BH9, and BH10—supported by detailed field investigations and laboratory testing—were used to evaluate rock-mass characteristics and derive key geotechnical parameters. The site’s rock mass is primarily composed of moderately weathered andesitic units with discontinuities trending N020E and N020W. Rock Quality Designation (RQD), Rock Mass Rating (RMR), Q-system, and Geological Strength Index (GSI) analyses were employed to classify the rock masses. RMR and GSI values range from 43 to 67, corresponding to fair to good rock quality, consistent with Q-values indicating fair conditions. The derived shear-strength parameters (c = 0.15–0.46&#xa0;MPa; ϕ = 31°–35°) were used to calculate the allowable bearing capacity of shallow foundations. Results show that bearing capacity decreases with increasing foundation width and when transitioning from isolated to strip foundations. The strong agreement among classification systems confirms the reliability of the geotechnical evaluation. In general, the findings provide a validated engineering framework applicable to similar volcanic-rock foundation conditions in semi-arid environments.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Engineering Geological Assessment of the Darrehzar Copper Factory Site Using Rock Mass Classifications and Bearing Capacity Analysis

  • 期刊论文

  • 发表日期：

    2025年10月26日

查看全文
  • Hossein Naderi,
  • Davood Fereidooni

摘要

This study presents a comprehensive engineering-geological assessment of the Darrehzar copper concentration plant site, situated in southern Central Iran within the Urmia–Dokhtar volcanic belt. Fifteen exploratory boreholes of varying depths were drilled, and data from boreholes BH6, BH9, and BH10—supported by detailed field investigations and laboratory testing—were used to evaluate rock-mass characteristics and derive key geotechnical parameters. The site’s rock mass is primarily composed of moderately weathered andesitic units with discontinuities trending N020E and N020W. Rock Quality Designation (RQD), Rock Mass Rating (RMR), Q-system, and Geological Strength Index (GSI) analyses were employed to classify the rock masses. RMR and GSI values range from 43 to 67, corresponding to fair to good rock quality, consistent with Q-values indicating fair conditions. The derived shear-strength parameters (c = 0.15–0.46 MPa; ϕ = 31°–35°) were used to calculate the allowable bearing capacity of shallow foundations. Results show that bearing capacity decreases with increasing foundation width and when transitioning from isolated to strip foundations. The strong agreement among classification systems confirms the reliability of the geotechnical evaluation. In general, the findings provide a validated engineering framework applicable to similar volcanic-rock foundation conditions in semi-arid environments.