摘要
针对深井高应力软岩巷道围岩大变形、强流变性、强烈底鼓等非线性大变形围岩控制难题,以邢东矿-980m大巷为工程背景,现场调研-980m大巷围岩变形破坏特征,阐明了高地应力、强烈地质构造、高渗透压环境下深部巷道围岩变形机制机理,以库伦-莫尔应力圆分析了-980m大巷围岩开挖造成的高主应力差对围岩破坏作用。在上述研究的基础上,针对性地提出了"高性能锚网喷+高强锚索+可缩性环形支架+注浆加固"的联合支护技术,并进行工业性实践。工程实践表明,该技术可有效解决-980m大巷围岩控制难题,对类似巷道围岩控制具有借鉴意义。
In order to solve the difficult problem of controlling surrounding rock including large deformation, strong rheological proper- ty, strong floor heave in soft-rock roadway with high stress in deep mine, by surveying deformation and failure characteristic of main roadway at -980m level in Xingdong Colliery, its deformation mechanism under the environment of high geo-stress, strong tectonic and high seepage pressure was discussed. Applying Coulomb-Mohr stress circle, failure action of high principal stress difference on sur- rounding rock induced by excavation of main roadway was analyzed. On the basis of this, combined supporting projection of ＂anchored mesh injecting ＋ high-strength anchored cable ＋ grouting reinforcement＂ was put forward. Engineering practice showed that this tech- nology could effectively solve the supporting problem of -980m main roadway and had reference value for similar condition.
出处
《煤矿开采》
北大核心
2015年第2期35-38,62,共5页
Coal Mining Technology
基金
国家自然科学基金项目(51234005)
中央高校基本科研业务费专项资金资助(2010YZ02)
关键词
千米深井
围岩变形
破坏机理
高应力
联合支护
lO00m deep mine
surrounding rock deformation
failure mechanism
high stress
combined supporting
