【摘要】 宝峰深埋隧道洞深附近地质情况复杂,需对岩体完整性进行评价。依据可控源音频大地电磁法(CSAMT)的带地形二维非线性共轭梯度(NLCG)反演结果,把电阻率异常分为Ⅴ类、Ⅳ类、Ⅲ类及Ⅱ类,分别对应极破碎岩体(Ⅴ级围岩)、破碎岩体(Ⅳ级围岩)、较破碎岩体(Ⅲ级围岩)和完整岩体(Ⅱ级围岩)。结合围岩分级结果,查明了宝峰深埋隧道洞深附近岩性、断层破碎带及岩溶位置,对岩体完整性进行了评估。经钻孔及地质资料验证,CSAMT勘探达到了预期效果。更多还原

【Abstract】 Based on the NLCG inversion results of CSAMT,resistivity anomaly of CSAMT data were divided into four types(type Ⅴ,type Ⅳ,type Ⅲ and type Ⅱ),four tunnels(route) in the lines were compared and one of them was recommended in the light of engineering geological condition-based extent of anomaly and hard rock.Ac-cording to the rock classification results,we identified the distribution of fault fracture zone and karst area,and we also assessed the integrity of the rock.Verified by drilling and geological data,CSAMT exploration reached the desired results.更多还原