不同推进方向对近距离巷道围岩的影响  

Influence of Different Advancing Directions on Surrounding Rock of Short Distance Roadway

作　　者：杨自友 蔡永彬 程长清 赵春堂 YANG Ziyou;CAI Yongbin;CHENG Changqing;ZHAO Chuntang(College of Civil Engineering,Anhui Jianzhu University,Hefei 230601,China;The Third Construction Engineering Co.,Ltd.of China Construction Second Bureau,Beijing 100070,China)

机构地区：[1]安徽建筑大学土木工程学院,安徽合肥230601 [2]中建二局第三建筑工程有限公司,北京100070

出　　处：《安徽建筑大学学报》2023年第2期1-6,共6页Journal of Anhui Jianzhu University

基　　金：安徽省高校自然科学研究重点项目(KJ2021A0610)。

摘　　要：为了研究工作面沿倾向和走向推进对其下方巷道围岩稳定性的影响,利用数值模拟软件FLAC3D分析在不同推进方向下交叉巷道的应力、位移以及塑性区的分布规律。结果表明:推进相同距离时,倾向方向推进对下部巷道围岩应力场及塑性区变化的影响比走向方向的小,但位移变化无显著的规律性。其中,倾向比走向的垂直应力和水平应力最大分别减小了6%和26%。随着推进距离的增加,巷道的应力、走向方向位移、塑性区均增大,而倾向方向位移几乎不变。此工程环境下,巷道交叉部位以及煤层和巷道中间部位应力、位移和塑性区变化较大,正式开采时需要对该位置重点支护。To study the influence of the working face advancing direction along the dip and strike on the surrounding rock stability of the roadway below it,the numerical simulation software FLAC3D is used to analyze the stress,displacement and plastic zone distribution of the cross roadway in different advancing directions.The results show that with the same advancing distance,the influence of dip mining on the stress field and plastic zone of the surrounding rock of the roadway below is smaller than that of strike mining,and the displacement change has no significant regularity.The dip vertical stress and horizontal stress are smaller than the strike vertical stress and horizontal stress,and the minimum reduction is 6%and 26%,respectively.As the advancing distance increasing the stress,strike displacement and plastic zone of roadway increase,while the dip displacement is almost unchanged.In this project,the stress,the strike displacement and plastic zone at the intersection of roadway and the middle of coal seam and roadway change greatly,so it is necessary to provide support at this position in mining.

关 键 词：推进方向 交叉巷道 围岩稳定 FLAC3D模拟 

分 类 号：TD823[矿业工程—煤矿开采]