摘要
在矿井上行开采过程中,为了准确掌握下部煤层回采对其顶板含水层及上部煤层顶板含水层的影响,进而有针对性的采取防治水措施。在对矿井水文地质条件分析的基础上,利用FLAC3D软件建立了三维数值模型,对下部煤层回采的"两带"发育范围进行了预测,并分析了复合含水层对下部煤层回采的威胁程度。结果表明:下部煤层的"两带"发育最大高度小于2个煤层的间距,仅受到其顶板含水层的影响,上部煤层顶板含水层对其未构成水害威胁,进而确定了需要开展的防治水工作。通过分析,基于数值模拟的下部煤层"两带"发育范围预测可以作为上行开采条件下制定防治水措施的依据。
In the process of ascending mining, in order to research the influence of lower coal mining on its roof aquifer and the upper coal roof aquifer, and taking targeted water prevention and control, based on the analyzing of mine hydrogeological conditions, we established three - dimensional numerical model by FLAC3D, forecasted the scope of ＂ two belts＂ by lower coal mining, and analyzed threat level of the lower coal mining for compound aquifer. Results showed that the scope of ＂two belts＂ by lower coal mining was less than the distance between two coal seams, only under the influence of its roof aquifer; there was no threat of the upper coal roof aquifer; and then the work of water hazard prevention was determined. Through the analysis, the scope of ＂two belts＂ by lower coal mining based on numerical simulation forecasting can be taken as water prevention and control measures under the condition of ascending mining.
出处
《煤矿安全》
CAS
北大核心
2014年第10期58-61,共4页
Safety in Coal Mines
基金
国家科技支撑计划资助项目(2012BAC10B03)
中煤科工集团西安研究院面上资助项目(2014MS010)
关键词
数值模拟
上行开采
防治水
复合含水层
砂岩
numerical simulation
ascending mining
water prevention and control
compound aquifer
sandstone
