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平朔一号井工矿顶板水害评价方法与应用研究

Research Method and Its Application on Water Damage of Roof at Pingshuo No.1 Shaft

【作者】 徐连利

【导师】 武强;

【作者基本信息】 中国矿业大学(北京) , 地质工程, 2010, 博士

【摘要】 通过区域水文地质条件的理论分析,和矿井暴露的特征研究,确定了平朔一号井工矿在受担水沟断层对地下水阻拦下所处的径流-排泄区位置和矿井水文地质条件中等的情况。以平朔一号井工矿太西采区为例,运用顶板“三图双预测”理论,通过以GIS的AHP方法的叠加,生成了顶板富水性分区图,并结合充水水源判释、充水通道分析,与地面瞬变电磁和井下音频电透探测的结果互为验证;在划分三带的基础上,通过理论分析建立了工程地质模型,并运用FLAC3D进行数值模拟,得出了开采冒裂性分区图;顶板富水性分区图与开采冒裂性分区图叠加,生成了顶板涌突水条件综合分区图,以此圈定了顶板危险区以及较危险区域,为成功运用“双预测”法奠定了基础。在建立顶板水文地质模型基础上,应用MODFLOW地下水流模拟软件对顶板冒裂处理前后矿井涌水量进行了分区、时的预算评价。结合矿井生产地质条件和顶板涌突水条件综合分区,针对性的对一号井工矿五大水源的防治提出了综合措施。

【Abstract】 Through the theoretical analysis about regional hydrogeology condition, and the same conditions of mine to be exposed, the runoff and excretion position of Pingshuo No.1 Shaft under the condition that the Danshuigou fault discourages the groundwater and medium mine hydrogeological conditions was determined. Based on "three maps and two predictions" method, using Taixi mining area of No.1 Shaft as prototype, through method of GIS-AHP superposition, the zone map of roof water which is analyzed by sufficient water and full of water was accomplished. With the actual production issues in mine and the outcome of transient electromagnetic exploration, the map and the results are verified each other. Based on the triple-zone divided, the engineering geological model was established through the theoretical analysis. The range of caving zone and height was attained by using numerical stimulation of FLAC3D. Overlaid the zone map of roof water gushing condition and division graph of caving zone, the water-inrush condition was generated.As the way, the risk and the next level risk zoning of caving zone that has been base of "two predictions" method were divided. The hydrology model of roof was established, and we utilized MODFLOW the groundwater flow simulation software to budget and evaluate the water-bursting inflows of previous and following the caving. And combinning with productive geological conditions and the water-inrush condition, the comprehensive control measures of five water sources were put forward.

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