摘要
断层破碎带围岩具有松散、软弱等特征,强度低,易膨胀和发生塑性流变,增加了岩巷掘进与支护的困难。西峰仑煤矿-380m水平东大巷过地质破碎带时采用砌碹+拱形支架+底板捣制+壁后注浆联合支护技术,根据1年的观测,巷道帮部最大水平位移20mm,顶底板最大移近量4mm,有效地控制了破碎带巷道的变形。
The characteristic of loose,soft,low strength,easy expansion and plasticity rheology of fault fracture zone surrounding rock increased the difficulty of rock roadway driving and supporting.Combined supporting technology of arching＋support arch＋floor ram ＋ grouting behind segment was used while crossing geological fracture zone at-380 mlevel east roadway in Xifenglun Colliery,according to one year of observation,the biggest level displacement of roadway wall was 20 mm,the largest convergence of roof and floor was 4mm,which effectively controlled the roadway deformation of fracture zone.
出处
《江西煤炭科技》
2014年第4期52-54,共3页
Jiangxi Coal Science & Technology
关键词
岩巷
断层破碎带
联合支护
rock roadway
fault fracture zone
combined support
