在现场对大柳行金矿奄口矿区进行了节理裂隙调查统计工作,采用Mathematica软件对调查区域内660条节理裂隙测量数据进行分析并绘制相应的裂隙等密图、倾向和走向玫瑰图及倾角直方图.经分析研究后得出如下结论:矿区矿体较为破碎,下盘围岩完整程度低于上盘围岩;各中段节理裂隙分布密度均约为2~3条/m;节理裂隙总体上有越往深部越不发育,岩体完整性变好的趋势.对矿区具有代表性的矿岩现场取样并进行物理力学试验,依据RMR岩体质量评价方法,得出上盘围岩RMR评分值68.3,岩体质量等级为Ⅱ级,为良好性岩体;下盘围岩RMR评分值65.7,岩体质量等级为Ⅱ级,也为良好性岩体;矿体RMR评分值55.8,岩体质量等级为Ⅲ级,为一般性岩体.研究成果对保证矿体的安全、高效、经济回采具有重要指导意义.
引用:
穆锡川,
李景波,
刘杰,
张翼凤,
尹旭岩
大柳行金矿床节理裂隙调查与岩体质量评价.
黄金,
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