深部巷道平顶稳定性分析及返修控制研究  

Analysis of flat roof stability in deep roadway and its repair control

作　　者：潘锐 王雷[3,4] 蔡毅[1,2] 王凤云 黄厚旭 许硕 张皓杰 张朋 PAN Rui;WANG Lei;CAI Yi;WANG Fengyun;HUANG Houxu;XU Shuo;ZHANG Haojie;ZHANG Peng(Anhui Province Key Laboratory of Building Structure and Underground Engineering,Anhui Jianzhu University,Hefei,Anhui 230601,China;School of Civil Engineering,Anhui Jianzhu University,Hefei,Anhui 230601,China;Research Center of Geotechnical and Structural Engineering,Shandong University,Jinan,Shandong 250061,China;School of Civil Engineering,Ludong University,Yantai,Shandong 264025,China)

机构地区：[1]安徽建筑大学建筑结构与地下工程安徽省重点实验室,安徽合肥230601 [2]安徽建筑大学土木工程学院,安徽合肥230601 [3]山东大学岩土与结构工程研究中心,山东济南250061 [4]鲁东大学土木工程学院,山东烟台264025

出　　处：《采矿与安全工程学报》2021年第4期756-765,共10页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(51904006,41941018,51927807);山东省重大科技专项(2019SDZY04);安徽建筑大学科研项目(2019QDZ03)。

摘　　要：针对圆弧平顶这类极少出现的特殊巷道断面力学特性不明,原支护方案及一般返修方案无法满足围岩稳定控制要求等问题,基于极限分析理论建立相应的巷道顶板力学模型,算例分析不同参数对顶板稳定性的影响规律;根据巷道不同地段现场变形破坏情况,针对性地提出"不同地段分区控制,关键部位加强支护,破碎围岩注浆加固,极端条件联合支护"的返修控制对策,设计相应的返修方案并进行现场应用。研究结果表明:采用注浆加固等措施提高岩体力学参数,改进主动支护构件强度或者采用高强高刚的被动支护构件提高支护阻力,均能有效提高巷道圆弧平顶的稳定性。基于现场巷道变形破坏情况,将返修地段划分为严重破坏区、一般破坏区、局部破坏区和潜在破坏区,对严重破坏区设计联合支护返修方案,巷道控制效果显著,最大变形量没有超过40 mm;其他返修区段采用注浆加固后,除个别地段变形稍大外,基本控制在50 mm以内,总体上满足使用要求。研究成果可为类似巷道支护设计及返修提供指导与参考。In view of such problems as unclear mechanical properties of special roadway section with arc-flat-roof,and incapability of original support and general repair scheme to meet requirements of surrounding rock stability control,the corresponding mechanical model of roadway roof was established based on limit analysis theory,and the influence law of different parameters on roof stability was derived through analysis of examples.According to on-site deformation and failure of different roadway sections,targeted repair control measures of"divisional control of different sections,strengthening support in key parts,grouting reinforcement of broken surrounding rock,and combined support under extreme conditions"were proposed,and corresponding repair scheme was designed and applied on site.The results have shown that stability of circular-arc-flat roof can be effectively improved by improving mechanical parameters of rock mass through grouting reinforcement and increasing support resistance through strengthened active support components or high strength and high rigidity passive support components.Based on on-site roadway deformation and failure,the repair section was divided into four types:seriously damaged zones,generally damaged zones,partially damaged zones and potential damage zones.Joint support and repair schemes were designed for the seriously damaged zone,which proved to be remarkable in roadway control,with maximum deformation less than 40 mm.After grouting reinforcement in the other repair zones,deformation was basically controlled within 50 mm except for larger deformation in some zones,which can basically meet the operation requirements.The research results can provide guidance and reference for similar roadway support design and repair.

关 键 词：深部巷道 圆弧平顶 极限分析 分区返修 围岩控制 

分 类 号：TD32[矿业工程—矿井建设]