秀水河铁矿露天采场边坡岩体质量评价  

Quality Evaluation of Rock Mass of Open Pit Slope of Xiushuihe Iron Mine

作　　者：张良喜 韩刚 ZHANG Liangxi;HAN Gang(The 4th Geological Brigade of Sichuan,Chengdu 611130)

机构地区：[1]四川省第四地质大队,成都611130

出　　处：《四川地质学报》2023年第4期674-682,共9页Acta Geologica Sichuan

摘　　要：矿山边坡岩体质量是边坡稳定性研究的基础。以秀水河铁矿露天采场边坡为例,采用工程地质测绘方法查明边坡地质环境条件,利用钻孔岩芯、岩石力学试验成果,基于RMR法开展岩芯岩体质量分级,并进一步与微动勘探成果对比分析,综合评价边坡岩体质量。研究表明:边坡岩体以II级、IV级为主;边坡表部发育厚度为10~20m松弛带,岩体质量为IV级,花岗岩、辉长岩岩体以II级为主,铁矿石受外部扰动较为强烈地段表现为IV级,其余为III级,局部可见少量II级岩体;肉眼难以分辨的爆破、松弛裂隙易于忽视,从而导致RMR分级结果偏离实际,可采用微动勘探方法进一步综合分析。The rock mass quality of mine slope is the basis of slope stability research.Taking the slope of Xiushuihe Iron mine as an example,the geological environment conditions of the slope were ascertained by engineering geological surveying and mapping method,and the quality of rock mass in the core was classified based on RMR method by using drilling core and rock mechanics test results,and the quality of rock mass in the slope was comprehensively evaluated by further comparison and analysis with the micromotion exploration results.The research shows that the slope rock mass is mainly grade II and grade IV.The surface of the slope is a relaxation zone with a thickness of 10~20m,and the quality of the rock mass is grade IV.The granite and gabbro rock mass are mainly Grade II,the iron ore is grade IV in the area with strong external disturbance.The rest are grade III,and a small amount of grade II rock mass can be seen locally.The blasting and relaxation cracks that are difficult to be distinguished by the naked eye are easy to be ignored,which leads to the deviation of RMR classification results from the reality.The micromotion exploration method can be used for further comprehensive analysis.

关 键 词：岩体质量 矿山边坡 RMR 微动勘探 秀水河铁矿 

分 类 号：P642[天文地球—工程地质学]