眼前山铁矿露天转地下开采岩体破坏规律研究  

Failure Law of Rock Masses in Transition from Open-Pit to Underground Mining in Yanqianshan Iron Mine

作　　者：王钟钰 蒋永超 贾若彤 姜骜鹏 陈忠辉[1] WANG Zhongyu;JIANG Yongchao;JIA Ruotong;JIANG Aopeng;CHEN Zhonghui(School of Mechanics and Civil Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China)

机构地区：[1]中国矿业大学(北京)力学与土木工程学院,北京100083

出　　处：《矿冶工程》2025年第1期14-20,26,共8页Mining and Metallurgical Engineering

基　　金：国家自然科学基金(52074292)。

摘　　要：针对鞍钢眼前山铁矿东帮区域露天转地下开采引起边坡岩体破坏及塌陷的问题,采用数值模拟和基底摩擦模型试验分析其边坡破坏过程和破坏模式,探究不同开采阶段塌陷角变化情况,并从裂隙角度总结塌陷区形成过程。结果表明,随着矿体开采深度不断延深,受开采扰动塌陷角不断减小;塌陷区域的形成分为四个时期:裂隙富集时期、时效变形时期、滑移面贯穿时期和塌陷形成时期;眼前山铁矿东帮边坡的破坏机制为滑移-拉裂破坏。In the east side of Yanqianshan Iron Mine of Anshan Iron and Steel Company,the transition from open-pit to underground mining causes failure and collapse of rock slope.In order to solve this problem,tests were performed by adopting numerical simulation and the base friction model to analyze the failure process and failure mode.The different collapse angles at different mining stages were explored,and development process of collapse area was summarized in terms of fissures.It is found that as mining operation proceeds,the collapse angle is reducing due to disturbance of mining activity;the collapse area undergoes four stages,including progressive fissure enrichment,deformation during aging,growth of slip surface,and collapse formation;and the slope failure in the east side of Yanqianshan Iron Mine is predominantly attributed to the sliding crack model of deformation.

关 键 词：眼前山铁矿 露天转地下 岩体破坏 塌陷 裂隙发展 边坡失稳 基底摩擦模型试验 

分 类 号：TD852[矿业工程—金属矿开采] TD327[矿业工程—矿山开采]