摘要
为研究深部开采时,岩性和位置关系对巷道围岩非对称变形的影响,运用FLAC3D对深部倾斜巷道进行不同岩性和位置关系下的位移变化特征、应力分布和塑性变形模拟分析。研究表明:巷道布置于偏硬岩层中时,岩性及位置关系对巷道围岩非对称变形影响较大;巷道布置于较软岩层中时,岩性及位置关系作用效果不明显;巷道布置于较硬岩层中时,位置关系影响较小,巷道所处层岩性对围岩变形、围岩应力分布起关键作用,岩性愈硬,应力集中愈严重,最大水平应力与最大垂直应力差值也随之变大。位置关系的改变对围岩塑性变形范围作用较小,但对围岩塑性破坏类型作用明显。
In order to study the influence of lithological characters and location on tunnel surrounding rock asymmetric deformation during deep mining,the displacement change characteristics,stress distribution and plastic deformation of deep inclined roadway under the relationship of different lithological characters and locations are simulated by FLAC3 D. Research showed that the relations of lithological characters and location had great influece on roadway surrounding rock asymmetric deformation when roadway placed in hard rock;when roadway placed in softer rock,the effect was less obviously; when roadway placed in harder rock,location relation affected gently; lithological character played a key role in surrounding rock deformation and the surrounding rock stress distribution,and the harder the lithological character of surrounding rock,the more serious of stress concentration,the bigger of maximum lateral stress and maximum vertical stress difference value. The change of location relationship had less effect on plastic deformation scale of surrounding rock,but had great effect on plastic damage pattern of surrounding rock.
出处
《煤矿安全》
CAS
北大核心
2017年第1期179-182,186,共5页
Safety in Coal Mines
关键词
岩性
位置关系
非对称变形
应力分布
巷道围岩
lithological character
positional relationship
asymmetric deformation
stress distribution
tunnel surrounding rock
