摘要
通过有限元计算,分析南京栖霞山矿巷道的稳定性以及巷道在不同的支护条件下的应力场和塑性区情况,得出不同埋深时主巷道和穿脉巷道较为合理的支护方式。对于主巷道和穿脉巷道中的矿岩巷道,采用喷射混凝土进行支护,支护后应力发生重分布,围岩中的应力集中明显减少并转移到混凝土喷层上。此外,部分围岩破碎、地下水较发育处应进行喷锚支护,而对于穿脉巷道的高丽山砂岩巷道,也需采用喷锚支护,部分巷道还应提前进行注浆加固。
The stress field and plastic zone of the main roadway and the branch roadway from 225 to 625 m depth below ground level of Qixiashan mining in Nanjing are studied by using finite element method(FEM).It is shown that the main roadway and the branch roadway in Qixiashan mining in Nanjing are instable.The stress field and plastic zone of the roadway are analyzed under different supporting methods.The reasonable support patterns are proposed for the main roadway and the branch roadway from 225 to 625 m depth below ground level.For the main roadway and the branch roadway constructed in the surrounding rock,the support of shotcrete is suggested.Reasonable thickness of concrete is established.In addition,anchor-gunited supporting should be applied to the branch roadway constructed in the sandstone rock.Length and pattern of anchor and thickness of concrete are determined.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2006年第z1期2656-2662,共7页
Chinese Journal of Rock Mechanics and Engineering
基金
国家科技攻关计划"西部开发科技行动"重大项目(2004BA901A02)
关键词
采矿工程
支护设计
应力场
塑性区
mining engineering
supporting design
stress field
plastic zone
