金川矿区深部巷道支护效果评价及参数优化研究  

Study on Supporting Parametric Optimizing Design and Evaluate Supporting Effect of Deep Roadway in Jinchuan Mine

作　　者：李光 马凤山[1,2] 刘港[1,2,3] 郭捷[1,2] 郭慧高 寇永渊[4] LI Guang;MA Fengshan;LIU Gang;GUO Jie;GUO Huigao;KOU Yongyuan(Key Laboratory of Shale Gas and Geoengineering,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;Institutions of Earth Science,Chinese Academy of Sciences,Beijing 100029,China;University of Chinese Academy of Sciences,Beijing 100049,China;Jinchuan Group Co.,Ltd.,Jinchang 737100,Gansu,China)

机构地区：[1]中国科学院地质与地球物理研究所,中国科学院页岩气与地质工程重点实验室,北京100029 [2]中国科学院地球科学研究院,北京100029 [3]中国科学院大学,北京100049 [4]金川集团股份有限公司,甘肃金昌737100

出　　处：《黄金科学技术》2018年第5期605-614,共10页Gold Science and Technology

基　　金：国家自然科学基金项目“金属矿山地下采动引起的竖井变形破坏机理研究”(编号:41772341)和“陡倾矿体充填开采岩移规律与充填体稳定性研究”(编号:41372323)联合资助

摘　　要：巷道支护问题一直是矿业工程中的难题,特别是在深部软岩巷道中,能否提供持久、有效的支护直接影响着矿山的安全生产和可持续发展。"双层网锚喷+U型钢拱架"联合支护是目前金川矿区在深部巷道支护中较常用的支护方案,为了解该方案的支护效果,在二矿区814 m分斜坡道上设立试验段,采用现场监测与数值模拟计算相结合的方法,对该试验段巷道的支护效果进行评价,并针对支护的薄弱部分提出改进措施。研究结果表明:(1)在当前支护条件下,巷道顶板和两帮围岩得到了较好的控制,但底鼓问题严重,最大位移可达110 cm;(2)针对当前支护方案的薄弱环节,提出增加锚杆长度、提高锚杆强度和增加底板支护等补强措施;(3)设计了一组参数优化方案,并对其支护效果进行了数值模拟分析,认为该优化支护方案能够有效地控制巷道围岩变形,并弥补原支护方案的缺陷。The roadway support has always been a difficult problem in the mining engineering,especially in the deep soft rock roadway,whether it can provide endurable and effective support directly affects the safety production and sustainable development of the mine.The composite supporting scheme of double layer boltmesh-anchor and U-shaped steel is frequently used in the deep roadway in Jinchuan mining area.In order to evaluate the supporting effect of this scheme,a tentative roadway was setted up on the 814 m ramp in No.2 mine.Through the combination of field monitoring and numerical simulation calculation,the supporting effect was evaluated,and an improvement measure was put forward.The results show that:(1)Under the present supporting conditions,the surrounding rock in the roof and both sides of the roadway are well controlled,but the floor heave is serious with the maximum displacement reaching 110 cm.(2)In view of the defects of the current supporting scheme,reinforcement measures,ranging from increasing the length of bolt,improving the strength of anchor rod to supporting the floor,were put forward.(3)An optimization scheme was designed,and the numerical simulation results show that the optimized supporting method can control the deformation of roadway surrounding rock effectively and solve the problems of the previous scheme.

关 键 词：巷道支护 金川矿区 FLAC3D数值模拟 参数优化 软岩巷道 深井巷道 

分 类 号：TD353[矿业工程—矿井建设]