高海拔破碎巷道支护参数优选  

Optimizing the parameters of support for broken high-altitude roadways in mines

作　　者：严体 孙进辉 田敏[2] YAN Ti;SUN Jinhui;TIAN Min(Research Institute of Mining,Yunnan Copper Co.,Ltd.,Kunming 650051,China;Kunming Engineering&Research Institute of Nonferrous Metallurgy Co.,Ltd.,Kunming 650231,China)

机构地区：[1]云南铜业矿山研究院,昆明650051 [2]昆明有色冶金设计研究院股份公司,昆明650231

出　　处：《有色金属（矿山部分）》2024年第2期80-87,共8页NONFERROUS METALS(Mining Section）

摘　　要：巷道支护参数选择的合理性是保障巷道稳定的关键。针对高海拔破碎围岩巷道变形严重的问题,以某矿山的运输平巷为工程背景,采取现场岩体结构调查,调查巷道的变形破坏状态,采用巷道松动圈声波测试,松动圈厚度在1.2~1.4 m,巷道支护松动圈分类为中松动圈Ⅱ类。基于上述研究,初步确定支护参数,最后用数值模拟软件对支护参数进行优化,采用喷锚网联合支护能满足要求,锚杆网度1.2 m×1.2 m,锚杆长度1.5 m,喷射混凝土厚度100 mm联合支护能满足安全要求。研究成果为该矿区巷道的支护设计提供了理论依据,也为类似工程的设计及施工提供借鉴思路。The secret to guaranteeing roadway stability is the logical choice of parameters that sustain the roadway.Using the transportation roadway of a particular mine as the engineering model,examine the deformation and failure status of the roadway based on the analysis of the rock mass structure in response to the issue of severe deformation in high altitude breaking rock mass.The loose circular of the roadway was subjected to acoustic testing;its thickness ranged from 1.2 to 1.4 m.The roadway support′s loose circle was categorized as a ClassⅡmedium loose circle.The aforementioned research served as the basis for the first estimation of the support parameters,which were then optimized using numerical simulation tools.When spray concrete is used with a thickness of 100 mm and an anchor mesh degree of 1.2 m×1.2 m along with an anchor rod length of 1.5 m,the combined support can satisfy safety regulations.The study′s findings offer a theoretical foundation for the roadway′s support design in the mining region as well as design and construction guidelines for related projects.

关 键 词：破碎围岩 巷道 松动圈 支护参数 数值模拟 

分 类 号：TD353[矿业工程—矿井建设]