RMR法在露采矿山边坡设计中的应用  

Application of RMR Method in Open-pit Mine Slope Design

作　　者：周林松 许宝田[1] 刘正明 刘开斌 朱凌昊 郑鹤 ZHOU Linsong;XU Baotian;LIU Zhengming;LIU Kaibin;ZHU Linghao;ZHENG He(School of Earth Sciences and Engineering,Nanjing University,Nanjing 210023,China;Second Geological Brigade of Jiangsu Provincial Bureau of Geology and Mineral Resources,Changzhou 213300,China)

机构地区：[1]南京大学地球科学与工程学院,南京210023 [2]江苏省地质矿产局第二地质大队,常州213300

出　　处：《高校地质学报》2025年第2期165-173,共9页Geological Journal of China Universities

基　　金：江苏省地质矿产勘查局科技创新项目(2022KY04;2024KJ03);国家重点研发计划课题(2018YFC1802401)联合资助。

摘　　要：露采矿山边坡稳定性分析和坡角取值是矿山边坡设计的关键问题。在矿山工程中,随着开采的逐渐推进,坡高逐渐增大,边坡稳定性会发生变化,坡角需要不断地进行调整。文章结合具体矿山边坡,现场布置地质调查点,对岩体工程地质特性进行调查,结合室内试验得到岩体质量指标RMR值。根据RMR值和矿山地形,确定本次研究的RMR值和坡高范围。在矿山边坡稳定性分析时,首先通过RMR值确定的地质强度指标(GSI)和坡高估算岩体的强度参数,最后通过简化毕肖普法计算边坡稳定性,得到给定安全系数条件下的平均坡角。通过分析RMR值和坡高对坡角的影响,提出平均坡角的理论计算公式,绘制了岩质边坡稳定性判断图。结合苏南地区某石灰岩矿山边坡工程实例,将研究结果与其他方法进行对比,验证研究结论的可靠性。文章研究结论可为矿山开采边坡设计和露采矿山稳定性评价提供理论依据。The stability analysis and average slope angle value of open-pit mining slopes are key issues that are in mine slope design.In mining engineering,with mining progresses,the slope height gradually increases will lead to a change of the slope stability,and the average slope angle needs to be continuously adjusted.This paper combines specific mine slopes,and geological survey points on site that were arranged to investigate the engineering geological characteristics of the rock mass,and obtain the rock mass classification(RMR)values of the rock mass quality indices combined with indoor testing.According to the rock mass classification values and the terrain of the mine,the rock mass classification values range and slope height range of this study are determined.During analyzing the stability of mine slopes,the geological strength index(GSI)determined by the rock mass classification value,and the strength parameters of the rock mass were estimated by the slope height are determined firstly.Then the slope stability was calculated by simplifying the bishop method to obtain the average slope angle under the conditions of the given safety factor.By analyzing the influence of rock mass classification value and slope height on the average slope angle,a theoretical calculation formula for the average slope angle was proposed,and a stability assessment diagram for rock slopes has been drawn.The calculation results of the research conclusions are compared with the calculation results of other scholars‘methods to verify the reliability of the research conclusions by combining a slope engineering example of a limestone mine in the southern Jiangsu region. The research conclusion of this article can provide a theoretical basis for the design of mining slopes and the stability analysis of open-pit mining slopes.

关 键 词：RMR法 平均坡角 坡高 露采矿山 

分 类 号：TD804[矿业工程—矿山开采] TU452[建筑科学—岩土工程]