摘要
采煤工作面回采巷道受采动影响矿压显现剧烈,复杂采动影响不利于回采巷道围岩稳定控制,致使支护工程问题日益凸显。本文以平沟煤矿020903工作面回风巷为研究对象,运用FLAC3D数值模拟技术,对多次采动影响下的回采巷道围岩应力环境变化、围岩变形破坏特征、承载结构进行数值模拟分析,分析得知:903回风巷处于邻近902采空区的围岩应力环境,同时存在来自903工作面回采影响,多重采场围岩应力叠加,围岩应力环境复杂变化造成巷道变形速率快、变形量大且支护较为困难,为此提出903回风巷采动巷道"锚索+锚杆+钢筋梯子梁+网"联合支护方案,实现对巷道的帮顶围岩的保护,进而充分发挥围岩本身的自承能力实现采动巷道的围岩控制。
Mining of coal face had a severe effect on strata behaviors, which went against adjoining rock stability and caused support engineering problems. Taking 020903 air return way in Pinggou Mine as example, FLAC3D numerical simulating technique was adapted to environmental change of surrounding rock stress, course deformation characteristics and bearing structure. The analysis showed that 902 air return way was close to surrounding rock stress goaf, at the same time, it was affected by stress superposition of surrounding rock in 903 working face. Complete changes of surrounding rock stress had bad influence on good deformation rate, high deformation value and support. As a result, combined supporting scheme ＂anchor cable＋ rock bolt＋ steel ladder beam＋ net was put forward in 903 air return way to protect help top of surrounding rock in roadway which using its self bearing capacity to realize surrounding rock control of mining influenced roadway.
出处
《煤炭与化工》
CAS
2017年第1期5-8,共4页
Coal and Chemical Industry
基金
内蒙古科技大学创新基金项目交错巷道巷间稳定性控制技术研究(2015QDL01)
关键词
煤岩回采巷道
采动影响
围岩稳定控制
联合支护设计
数值模拟
mining roadway of coal petrography
mining effect
control of adjoining reck stability
combined supporting design
numerical simulation
