深部软岩硐室群施工相互影响及变形破坏分析  

Analysis of the Interaction and Deformation and Failure of the Construction of Deep Soft Rock Chamber Group

作　　者：董亚宁 金爱兵[2] 陈成 殷登才 陆通 DONG Yaning;JIN Aibing;CHEN Cheng;YIN Dengcai;LU Tong(Zhongjiu Mining Branch,Anhui Masteel Mining Resources Group,Maanshan 243111,China;School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]安徽马钢矿业资源集团钟九矿业分公司,安徽马鞍山243111 [2]北京科技大学土木与资源工程学院,北京100083

出　　处：《金属矿山》2024年第6期61-70,共10页Metal Mine

基　　金：国家自然科学基金项目(编号:52174106)。

摘　　要：地下矿山溜破系统服务年限长,其涉及卸载、破碎等多个大断面硐室。为解决硐室群施工过程中由于相互影响导致围岩变形破坏特征复杂的问题,以钟九铁矿-550~-590 m水平溜破系统硐室群为工程背景,基于弹塑性理论获取硐室围岩塑性区范围,并构建矿石和废石卸载硐室、下部溜井、破碎硐室和储矿仓8个大断面硐室数值模型,分析单硐室施工和硐室群顺序施工过程中的围岩应力和变形时空分布特征,开展硐室群施工相互影响研究,并据此提出了变形控制方案。结果表明:随着溜破系统硐室群的顺序施工,废石破碎硐室、卸载硐室、储矿仓帮部最大变形呈线性增大趋势,帮部塑性区呈先增加后基本不变的趋势;已建设完成的硐室群会使后续施工硐室区域岩体质量变差,相比于施工单硐室,顺序施工至废石卸载硐室和废石储矿仓,其帮部变形分别增加了21.7%和53.4%,塑性区范围分别增加了32%和92%。研究成果可为钟九铁矿后续硐室施工和支护设计提供指导,对于类似矿山硐室群施工相互影响研究也有一定的参考意义。The slip breaking system of underground mine has a long service life,which involves many large section chambers such as unloading and crushing.In order to solve the problem of complex deformation and failure characteristics of surrounding rock caused by mutual influence during the construction of chamber group,taking the chamber group of-550~-590 m horizontal slip breaking system in Zhongjiu Iron Mine as the engineering background,the extent of the plastic zone in a chamber was obtained based on elastic plasticity theory.The eight large-section chamber numerical models of ore and waste rock unloading chamber,lower chute,crushing chamber and ore storage chamber were constructed.The spatial and temporal distribution characteristics of surrounding rock stress and deformation during single chamber construction and sequential chamber group construction were analyzed.The mutual influence of chamber group construction was studied.The deformation control program was proposed based on this.The results show that with the sequential construction of the chamber group of the slip breaking system,the maximum deformation of the waste rock crushing chamber,the unloading ketone chamber and the side of the ore storage silo increases linearly,and the plastic zone of the side increases first and then remains basically unchanged.The completed chamber group makes the rock mass quality of the subsequent construction chamber area worse.Compared with the construction of a single chamber,the deformation of the side is increased by 21.7%and 53.4%respectively,and the plastic zone is increased by 32%and 92%respectively.The study results can provide guidance for the subsequent chamber construction and support design of Zhongjiu Iron Mine,and also have a certain reference significance for the study on the mutual influence of construction of similar mine chamber groups.

关 键 词：硐室群 相互影响 围岩稳定性 数值模拟 

分 类 号：TD853[矿业工程—金属矿开采]