Jizhong Energy Group Corporation Limited Jizhong Energy Company Limited

为探讨大采深高承压水条件下煤层底板的突水机理,通过分析邯邢矿区底板突水的特征,从岩石结构及地下水动力及线弹性断裂力学等方面研究入手,首次提出了"分时段分带突破"的煤层底板突水机理。从空间上,将上组煤2号主采煤层至煤系基底奥灰强含水层之间,以薄层灰岩含水层为界划分4个隔水地质单元,按阻水能力将煤层底板岩体划分为11个阻水带,构建了6种底板突水模式,解释了高承压水从底往上逐带突破的物质基础条件;从时间上,将煤层底板渗水及突水通道形成进程划分为4个时段,确定了每个时段的界定条件。结合岩体力学分析,给出了底板突水综合判别式,为防控底板"分时段分带突破"突水进程提供决策。

in order to discuss the water inrush fmechanism of a seam foo under conditions of deep mining depth and igh prssurized water with an analysis on the foor water inush features of Hanxing Mining Area,from a study on the rock stouctre,underground water dynanic lin ar elatic frcturing and other mechanics,the paperfrity provided the water inush mechanism of the seanm for wih " time sections and divided zone breaking . From the space,there were four water isolated geological elements dtiviced the aquifer in the thin limestone betwee the No.2 seamo of the main mining seam in the top group seam and Oordovicianlimnestone aquifen of the :oal measure fcor.Based on the water resistance capactythe foor rocks of the seam were divided to 11 water resistance " subzones "t hre were ts foor water inrushmodels established and the material basic conditons to make the high pressuized water breaking through each zon e from bcoton to the to were interpreted. From a wew of the time,the process to form the sean foor seepage and water inrush channel was drided to four " ime-ecions" and thecertan condton of at time sectonwas defined. Incombination wth the mechanics analysis a comprehensive discriminant of the for water inush was provided in ovderto poide the decson to preventand control the water inrush process with " time section and subzone breaking through".

国家自然科学基金资助项目(41272276；51174289)；