摘要
采用RFPA2D模拟软件,采用应力加载方式,对不同侧压系数下的3 m×3 m矩形断面和3 m×5 m×5 m六角形断面进路进行数值模拟。研究云南彝良铅锌矿河东矿区毛坪矿760 m水平第五分层进路开挖时,3 m×3 m矩形断面进路和3 m×5 m×5 m六角形断面进路在不同的侧压系数下进路顶板及矿柱的破坏分析。两种巷围岩以剪切破坏为主,当侧压力系数为1.5时,进路顶板突变破坏相对缓和。而侧压力系数为1.3时,充填体突变破坏较剧烈、破坏程度最大。随着侧压系数的增大,水平方向的位移会逐渐增大,垂直方向的位移会逐渐减小。侧压系数相同时,六角形断面的进路垂直位移比矩形断面的位移小,故在限制顶板位移方面明显优于矩形进路。
This paper uses RFPA2D simulation software in a loading method to simulate under different lateral pressure coefficients of 3 m ×3 m rectangular and hexagonal section 3 m ×5 m ×5 m approach.The research on Yiliang Lead-zinc Mine with 760 m deep level in fifth slicing drift excavation shows that an analysis of 3 m ×3 m rectangular cross-section approach and 3 m ×5 m ×5 m hexagon drift is under different lateral pressure coefficients in the route the roof and pillar damage.Two kinds of roadway surrounding rock are mainly shear failure when the＆amp;nbsp;lateral pressure coefficient is 1.5 with drift roof mutations disrupt in relative ease.The lateral pressure coefficient is 1.3,with filling mutations disrupt in more severe damage.In the development of lateral pressure coefficient,the displacement in the horizontal direction will gradually increase.Meanwhile the vertical displacement will decrease gradually.Lateral pressure coefficient is the same,with the hexagonal section of the route vertical displacement more than the displacement of the rectangular section of small.So in limit the roof displacement,it was significantly better than that of the rectangular approach.
出处
《中国锰业》
2016年第4期47-52,共6页
China Manganese Industry
基金
国家自然科学基金项目(51164016)
甘肃省科技重大专项计划项目(1203GKDC003)
