新城金矿深部斜坡道围岩稳定性分析与控制技术  

Stability Analysis and Control Technology of Deep Ramp Surrounding Rock in Xincheng Gold Mine

作　　者：蒋万飞 秦绍龙 赵兴东[2] 刘滨 张庆 鲁鑫 JIANG Wanfei;QIN Shaolong;ZHAO Xingdong;LIU Bin;ZHANG Qing;LU Xin(Xincheng Gold Mine,Shandong Gold Mining Co.,Ltd.,Laizhou 261438,China;Laboratory for Safe Mining in Deep Metal Mine,Northeastern University,Shenyang 110819,China)

机构地区：[1]山东黄金矿业股份有限公司新城金矿,山东莱州261438 [2]东北大学深部金属矿采动安全实验室,辽宁沈阳110819

出　　处：《金属矿山》2023年第10期31-36,共6页Metal Mine

基　　金：国家自然科学基金重点项目(编号:52130403);中央高校基本科研业务费项目(编号:N2001033)。

摘　　要：随着浅部资源的枯竭,我国金属矿石开采逐步进入深部阶段。为探索金属矿深部巷道围岩稳定性分析和控制技术,以新城金矿深部斜坡道围岩支护技术为研究背景,前期通过现场工程地质调查获取围岩的结构面信息,采用Dips对结构面信息进行统计分析。在现场进行岩石取样后,对样品进行室内岩石力学试验,最终获得了岩石的物理力学参数。采用Q分级、RMR分级及GSI对岩体进行质量分级,采用Roc Lab对岩体的物理力学参数进行估算。应用Unwedge对巷道的潜在楔形体进行了识别,发现巷道顶板存在大型楔形体,且存在极大冒落风险,并基于岩体质量分级结果和分级支护图表,确定采用“树脂锚杆+锚索+金属网+双筋条+钢筋梁+喷射混凝土”对该区域进行支护。最终应用Phase2和Unwedge对巷道支护效果进行分析。结果表明,采用该支护方式后围岩的塑性区范围和位移量都有所降低,顶板楔形体的安全系数也提高到了35.897,冒落风险得到了有效的控制。本研究证明该支护方式可有效保证巷道围岩的稳定,也可为类似矿山的巷道围岩支护提供指导。With the depletion of shallow resources,China′s metal ore mining has gradually entered the deep stage.In order to explore the stability analysis and control technology of the surrounding rock of the deep tunnel of the metal mine,taking the surrounding rock support technology of the deep ramp of Xincheng Gold Mine as the research background,the structural plane information of the surrounding rock was obtained through on-site engineering geological survey in the early stage,dips is used for statistical analysis of structural plane information,and it is finally determined that there are three groups of joints and some random joints in the survey plane.After rock sampling in the field,indoor rock mechanical tests were carried out on the samples,and the physical and mechanical parameters of the rock were finally obtained.The rock mass quality is graded by Q grading,RMR grading and GSI.The results show that the rock mass quality of the surrounding rock of the survey area is very poor,and the rock mass quality grade is IV.The physical and mechanical parameters of rock mass are estimated by using rock mass mechanical parameter calculation software RocLab.Based on the RMR and the tunnel self-stabilization time estimation chart,the tunnel self-stabilization time is estimated,and the results show that the self-stabilization time is only 10 h.The wedge analysis software Unwedge was used to identify the potential wedge of the tunnel,and it was found that there was a large wedge in the tunnel roof,with a safety factor of zero,indicating that there was a great risk of falling of the wedge,which required immediate support.Based on the rock mass quality grading results and grading support chart,it is determined to adopt"resin bolt+anchor cable+metal mesh+double reinforcement bar+reinforcement beam+shotcrete"to support the area.Finally,the numerical simulation software Phase2 and wedge recognition software Unwedge are applied to analyze the tunnel support effect.The results show that the range of plastic zone and displacement of

关 键 词：深部巷道 工程地质调查 岩体质量分级 支护方案设计 数值模拟 楔形体识别 

分 类 号：TD322[矿业工程—矿井建设]