摘要
地下水渗流导致巷道掘进工作面突水或成巷段支护失效的灾害在煤矿时有发生。基于泥岩全应力–应变加载过程的渗透特性试验研究,分析掘巷影响区不同时空条件下巷道岩体裂隙的渐次发育过程,揭示巷道围岩渗透特性的动态演化规律以及轴向、径向和环向3个方向的渗流特征。该规律对注浆孔深、间排距、注浆时机等控制渗流灾害的注浆参数设计具有明确的指导作用。进一步分析防止渗流泥化灾害的最佳注浆时机和合理注浆孔布置等渗流灾害控制关键参数,提出控制泥质巷道围岩防止渗流灾害的注浆稳定技术。该技术可用于指导渗水威胁条件下的巷道围岩施工,实现减缓或消除渗流灾变。在一穿断层导通砂岩含水层的煤矿开拓巷道工程中应用该技术,有效地控制了渗流灾害。
Water inrush in working face and support failure of the driven roadway caused by underground seepage occur from time to time. Based on experimental study on permeability behaviors of argillaceous rock during the complete stress-strain loading process, an analysis of the gradual development process of rock fissure under spatiotemporal changes in the roadway constructing area is carried out. Dynamic permeability evolving laws and three-directional（i.e, axial, radial, and circular） distributing characteristics of the surrounding rock have been explored. The laws are of great importance to determine key parameters of grouting depth, layout of grouting holes and optimum grouting opportunity. Further studies are presented to get perfect grouting opportunity and rational layout of grouting holes to prevent seepage disasters. A whole set of grouting control technology is put forward. A successful engineering case of a roadway crossing fault zone lying in sandstone bed aquifer is presented to provide valuable guidance for surrounding rock mass of roadway constructed under the threat of seepage. Thus, the slowing-down and even elimination of seepage disasters can be expected.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2009年第2期330-335,共6页
Chinese Journal of Rock Mechanics and Engineering
基金
国家重点基础研究发展计划(973)项目(2007CB209408)
国家自然科学基金资助项目(50674085)
2006年教育部新世纪优秀人才支持计划(NCET–06–0478)
高等学校学科创新引智计划资助项目(B07028)
关键词
采矿工程
巷道
裂隙
渗流灾害
注浆
控制技术
mining engineering
roadway
fissure
permeability seepage disasters
grouting
control technology
