中国矿业
中國礦業
중국광업
CHINA MINING MAGAZINE
2015年
2期
106-109,113
,共5页
袁胜军%李二鹏%郑阳%龚爽%王金光%李世俊
袁勝軍%李二鵬%鄭暘%龔爽%王金光%李世俊
원성군%리이붕%정양%공상%왕금광%리세준
大断面%复合结构%锚固层厚度%软弱夹层%高强高预应力锚杆
大斷麵%複閤結構%錨固層厚度%軟弱夾層%高彊高預應力錨桿
대단면%복합결구%묘고층후도%연약협층%고강고예응력묘간
large section%composite structure%anchored layer thickness%weak interlayer%high strength and high pre-stress anchor
针对某矿辅助运输大巷变形严重、返修量大的支护难题，对巷道顶板复合结构变形机制进行了力学分析，揭示出巷道顶部锚固层厚度、顶板软弱夹层与锚固区相对位置及锚杆（索）预应力是影响此类巷道稳定的重要因素；运用FLAC3D数值模拟软件对不同支护参数的控制效果进行了研究，结合现场生产地质条件综合确定了“高强高预应力锚杆（索）＋金属网＋W型钢带＋喷射混凝土”联合支护方案。现场实践表明，巷道顶底板移近量以及两帮移近量明显减少，围岩变形得到了有效的控制。
針對某礦輔助運輸大巷變形嚴重、返脩量大的支護難題，對巷道頂闆複閤結構變形機製進行瞭力學分析，揭示齣巷道頂部錨固層厚度、頂闆軟弱夾層與錨固區相對位置及錨桿（索）預應力是影響此類巷道穩定的重要因素；運用FLAC3D數值模擬軟件對不同支護參數的控製效果進行瞭研究，結閤現場生產地質條件綜閤確定瞭“高彊高預應力錨桿（索）＋金屬網＋W型鋼帶＋噴射混凝土”聯閤支護方案。現場實踐錶明，巷道頂底闆移近量以及兩幫移近量明顯減少，圍巖變形得到瞭有效的控製。
침대모광보조운수대항변형엄중、반수량대적지호난제，대항도정판복합결구변형궤제진행료역학분석，게시출항도정부묘고층후도、정판연약협층여묘고구상대위치급묘간（색）예응력시영향차류항도은정적중요인소；운용FLAC3D수치모의연건대불동지호삼수적공제효과진행료연구，결합현장생산지질조건종합학정료“고강고예응력묘간（색）＋금속망＋W형강대＋분사혼응토”연합지호방안。현장실천표명，항도정저판이근량이급량방이근량명현감소，위암변형득도료유효적공제。
In order to solve the support problems of the auxiliary haulage roadway ,such as large deformation and frequent rework ,we revealed the roadway stability influence factors that are anchored thickness ,relative positional relation of weak interlayer and anchorage area and anchor cable pre‐stress by means of the mechanical stability analysis of deformation mechanism in the composite structure above roof . Furthermore ,we researched the control effect with different parameters aided by FLAC3D .In addition , combined with field production and geological conditions ,we finally proposed the collaborative support program consists of high strength and high pre‐stressed anchor (cable) ,metal mesh ,W steel trips and concrete injection .The field practice shows that deformation amount of roof ,floor and two sides in roadway obviously decreased ,which indicates the effective control of the roadway surrounding rock deformation .
