不同断面尺寸下三心拱巷道围岩稳定性分析  

Stability analysis of surrounding rock in three-core arch roadway under different section sizes

作　　者：张必昇 娄培杰[1] 方勇 ZHANG Bisheng;LOU Peijie;FANG Yong(School of Civil Engineering and Architecture,Anhui University of Science and Technology,Huainan 232001,China)

机构地区：[1]安徽理工大学土木建筑学院,安徽淮南232001

出　　处：《四川建材》2022年第8期76-77,90,共3页Sichuan Building Materials

摘　　要：以芦岭煤矿Ⅲ1024底板巷工作面地质条件为背景,运用FLAC^(3D)有限元差分软件,分析在无支护条件下,三心拱巷道开挖后,断面尺寸对巷道围岩稳定性的影响。分析结果表明:三心拱巷道跨度不易过大,高跨比为1/3左右时,三心拱巷道最为稳定;随断面尺寸的增大应力不断向围岩深部集中,三心拱的垂直应力也相应增大;塑性区的变化主要集中在巷道的顶底板;在距离巷道左帮4 m之后,中、小断面帮部位移较为接近,距帮部越远,中、小断面差异越不明显。Taking the geological conditions of the working face of theⅢ1024 floor roadway in Luling Coal Mine as the background,the FLAC^(3D)finite element difference software is used to analyze the influence of the section size on the stability of the surrounding rock of the roadway after the excavation of the three-core arch roadway under the condition of no support.The analysis results show that the span of the three-core arch roadway is not easy to be too large,and when the height-span ratio is about 1/3,the three-core arch roadway is the most stable;The change of the plastic zone is mainly concentrated on the roof and floor of the roadway;after 4 m from the left side of the roadway,the displacement of the middle and small sections is relatively close,and the farther from the side,the less obvious the difference between the middle and small sections.

关 键 词：FLAC^(3D) 无支护 三心拱 围岩稳定性 

分 类 号：TD322.4[矿业工程—矿井建设]