金川矿区深部高地应力矿山巷道锚网支护技术  

Bolt-TECCO Net Supporting Technique in the Deep Mine Roadway with High Ground Stress in Jinchuan Mining Area

作　　者：李利峰 韩六平 张晓虎 邓慧琳 Li Lifeng;Han Liuping;Zhang Xiaohu;Deng Huilin(College of Civil and Architectural Engineering,Guizhou University of Engineering Science,Bijie 551700,China;College of Science,Guizhou University of Engineering Science,Bijie 551700,China)

机构地区：[1]贵州工程应用技术学院土木建筑工程学院,贵州毕节551700 [2]贵州工程应用技术学院理学院,贵州毕节551700

出　　处：《金属矿山》2020年第7期47-52,共6页Metal Mine

基　　金：贵州省科技厅联合基金项目(编号:黔科合LH字[2015]7589号);贵州省科学技术基金项目(编号:黔科合J字[2013]2011号);毕节市科技局联合基金项目(编号:毕科联合字G[2019]26号)。

摘　　要：金川矿区深部巷道地应力大、岩体破碎的特点凸显,矿山巷道原采用的锚喷支护方法在施工后具有围岩变形量大且持续时间长、喷射混凝土层掉块剥落及锚杆锚固力下降等问题,难以保证巷道安全可靠。通过对矿区巷道变形特征进行调查研究及理论分析,引入锚杆+TECCO网(无喷混凝土)支护技术来解决其支护难题。所研究的锚网支护具备两大特点:①支护过程中不采取喷射混凝土的方式;②结合巷道围岩变形实际情况,采用了通常应用于边坡防护工程中的高强度金属网(TECCO网)。研究表明:①具有高抗拉强度的TECCO网能够在巷道围岩产生变形后,使支护体逐渐与围岩形成一个紧密的整体结构,提高围岩自承能力;②试验巷道采取锚网支护40 d后,围岩变形速率小于0.1 mm/d,说明该支护方式可以有效控制巷道变形;③锚杆+TECCO网支护成本低、作业强度小,可对该矿高效及安全生产发挥积极作用。The obvious characteristics of deep roadway in Jinchuan Mining Area are large in-situ stress and brokenrock mass.The original bolting and shotcreting support method in mine roadway has many problems,such as large amount ofsurrounding rock deformation and long duration,falling off of shotcreting layer and falling of bolt anchoring force,which aredifficult to ensure the safety and reliability of roadway.Based on the investigation and theoretical analysis of the deformationcharacteristics of the roadway in the mining area,the Bolt+TECCO(no shotcrete)support technique is introduced to solvethe support problem.In this paper,the mesh supporting technique has two characteristics:(1)shotcrete is not used in the sup-port process;(2)the high-strength metal mesh(TECCO net)which is usually used in slope protection engineering is used incombination with the actual situation based on the deformation characteristics of surrounding rock of deep roadway.The studyresults show that:(1)TECCO network with high tensile strength can make the support and surrounding rock form a closewhole structure gradually after the deformation of surrounding rock,and improve the bearing capacity of surrounding rock;(2)the deformation rate of surrounding rock is less than 0.1 mm/d after 40 days of bolting and mesh supporting,which showsthat this support method can effectively control the deformation of roadway;(3)bolt+TECCO net support has the feature oflow cost and low operation intensity,which can plays a positive role in high efficiency and safety production of the mine.

关 键 词：深部开采 TECCO网 高应力巷道 支护 变形监测 

分 类 号：TD853[矿业工程—金属矿开采]