椭圆拱代替三心拱巷道断面的分析研究  

Analysis on Replacement of Three Centered Arch Roadway Section with Elliptical Arch

作　　者：周华龙[1] 

机构地区：[1]陇东学院能源工程学院,甘肃庆阳745000

出　　处：《煤炭工程》2015年第11期16-19,共4页Coal Engineering

摘　　要：为了研究椭圆拱代替三心拱巷道断面的可行性,采用理论计算和数值模拟方法,对椭圆拱与三心拱巷道断面的几何尺寸误差、位移特征和应力特征等进行分析,研究表明:三心拱与椭圆拱巷道断面尺寸误差远小于《煤矿安全质量标准化考核评级办法》中所规定的误差要求;两类巷道的位移特征基本相同;在巷道围岩浅部,椭圆拱断面巷道的垂直应力和水平应力均较三心拱巷道的小,随着向围岩深部发展,椭圆拱断面巷道应力增加幅度较三心拱巷道快,但对支护影响不大。To study the feasibility of replacement of three centered arch roadway section with elliptical arch,the paper analyzed the physical dimension error,displacement characteristics and stress distribution of roadway with elliptical arch section and three centered arch section,using theoretical calculation and numerical simulation. Research shows that,three centered arch and elliptical arch roadway section size is much smaller than the error required in＂the coal mine safety quality standardization assessment rating methods＂. The displacement characteristics of roadways with both kinds of section are basically the same. The vertical stress and horizontal stress of elliptical arch section roadway are smaller than three centered arch in the superficial roadway surrounding rock, while the stress of the elliptical arch section roadway is increased more greatly than three centered arch along the direction of deep surrounding rock,with little influence on the support.

关 键 词：三心拱 椭圆拱 巷道断面 位移特征 应力特征 

分 类 号：TD263[矿业工程—矿井建设]