顶板隔水层关键层耦合作用规律研究  

Coupling Action of Water-Resisting Roof Layer and Key Strata

作　　者：刘卫群[1] 顾正虎[1] 王波[1] 缪协兴[1] 

机构地区：[1]中国矿业大学理学院,江苏徐州221008

出　　处：《中国矿业大学学报》2006年第4期427-430,共4页Journal of China University of Mining & Technology

基　　金：国家杰出青年基金项目(50225414);国家自然科学基金重大项目(50490270);教育部科技重点项目(105024);中国博士后科学基金项目(20040350222);江苏省自然科学基金项目(BK2004033);江苏省博士后科研资助计划项目(2004071)

摘　　要：在煤矿开采过程中,如果覆岩裂隙扩展至贯穿隔水层,则会诱发地下水或地表水大量涌向采场,导致煤矿淹井事故.利用RFPA2D-Flow软件建立了隔水层关键层耦合的采场推进模型,计算并分析了裂隙场的发育和分布,绘制了顶板水渗流量曲线.讨论了与裂隙发育密切相关的覆岩支承压力与中间岩层厚度、关键层厚度及破断间的关系.结果表明:关键层未破断时,中间岩层厚度对隔水层裂隙发育作用不明显;厚关键层对隔水层能起较好的保护作用.In coal mining, groundwater or surface water rushes into the mining field eventually to cause the mine flooding if some fractures in surrounding rock strata extend and run through a water-resisting layer. The coupling models of water-resisting layer and key strata were proposed using the software RFPA^2D-Flow. The development and distributing of the fracture fields were calculated and the roof seepages curves were drawn. The relations between the bearing pressure and the mid-stratum thickness, the key-stratum thickness, and the key-stratum breaking which were closely relative to fracture were particularly discussed. The results show that the midstratum thickness slightly influences the fracture extension of a water-resisting layer before the key-stratum breaking, and a thicker key-stratum can protect the water-resisting layer well.

关 键 词：顶板隔水层 关键层 耦合作用 裂隙场 突水 

分 类 号：TD742[矿业工程—矿井通风与安全]