摘要
针对梅花井煤矿112102工作面回风巷顶板存在厚度变化的直罗组含水层,直接顶为粉砂质泥岩和存在泥质粉砂岩伪顶2种情况,通过顶板岩石的X-射线衍射、单轴抗压与烘干实验,掌握了围岩的微观组成结构、力学性能和水力影响因素,分析了复杂水环境下围岩失稳的机理,指出该条件下关键是减少对围岩的扰动和切断水源.据此,提出了堵水和隔水2种不同的支护技术理念,即在高性能的锚带网索的基础上,对巷道进行内部强化和表面封闭,阻隔或减弱水力通道,避免围岩因水运动和风化作用导致支护结构失效,确保巷道在服务期内的稳定,并在现场进行了成功应用.
Through the X-ray diffraction experiment,uniaxial compressive test,and drying experiment on roof rock,we get micro component structure,mechanical properties,and hydraulic influence factors of surrounding rocks;By analyzing the mechanism of instability of surrounding rocks under complicated water environment,we find that the key is to reduce the disturbance on surrounding rocks and to cut off the water source.On the basis of this,we put forward two support concepts of ＂water plugging＂ and ＂water insulation＂,including strengthening the internal and closing the surface of the roadway to plug or weaken the water channel.By doing so,we can prevent the strength of surrounding rocks from decreasing by water movement or weathering action,ensuring the stability of roadway in the service period.This technology has been successfully applied in a certain coal mine.
出处
《采矿与安全工程学报》
EI
北大核心
2011年第3期370-375,共6页
Journal of Mining & Safety Engineering
基金
国家自然科学基金项目(50974118)
教育部新世纪优秀人才支持计划项目(NCET-09-0727)
江苏高校优势学科建设工程资助项目
关键词
复杂水环境
煤层巷道
烘干试验
支护结构
complicated water environment
seam roadway
drying experiment
supporting structure
