摘要
基于安居煤矿煤巷复合顶板变形特征,以2305轨道顺槽为例,通过现场监测和FLAC^(3D)数值模拟,分析顶板岩层破坏范围和规律,确定优化支护方案。结果表明:原有支护参数不能有效地控制顶板岩层的变形,围岩塑性区的深度超过锚杆长度;优化后的支护参数有效地控制了顶板的变形移动。
Based on the deformation characteristics of compound roof in coal roadway of Anju mine,and combined with field monitoring and FLAC^(3 D)numerical simulation in 2305 tail entry, the damage extent and rules of roof strata were analyzed and the optimized supporting scheme was determined. The results showed that the existing support parameters could not effectively control the deformation of roof strata and the plastic zone of surrounding rock was over the length of bolts. After optimization,the support parameters can effectively control the roof deformation and movement.
出处
《煤炭技术》
CAS
北大核心
2015年第12期72-75,共4页
Coal Technology
关键词
复合顶板
现场监测
数值模拟
支护优化
compound roof
field monitoring
numerical simulation
support optimization
