Based on the basic geology this paper determines the development history of kailu basin , and comprehensively analyses hydrogeologic conditions and hydrogeochemical characteristics , as well as the uranium concentration in groundwater , determines the prospecting significance of regional confined aquifers in yaojia and sifangtai formations formed during the subsidence stage of the basin 本文从基础地质条件出发，界定了开鲁盆地的发展历史，全面分析了研究区的水文地质条件、水文地球化学特征及地下水的含铀性，确定了在整体坳陷期形成的姚家组和四方台组区域承压含水层的找矿意义。
The paper makes out comprehensive evaluation of under pressure mining of mining area through the below aspects : analysising water - resisting layer ' s occurrence geologic features , physical and mechanical property and stability of duancun - leigou bauxite deposit ; researching of confined aquifer ' s hydrogeology features , fault fracture zone and its transmissivity of cambrian - ordovician limestone ; combining calculation of thickness quantitative index of safe water - resisting layer and etc 摘要通过对段村雷沟铝土矿隔水层赋存地质特点、物理力学性质及其稳定性分析和寒武奥陶系灰岩承压含水层水文地质特征、断层破碎带及其导水性的研究，结合安全隔水层厚度量化指标的计算等，对矿区带压开采做出综合评价。
The results show that ( 1 ) the unconsolidated confined aquifer plays a crucial role in load transfer because of its fluidity and replenishment in time , making the loads of overburden soil evenly transfer into the bedrock through the unconsolidated confined aquifer and the load keep constant during the excavation process ; ( 2 ) under the condition without unconsolidated confined aquifer , the load on the bedrock will be reduced sharply during the excavation 研究结果表明：松散承压含水层条件下，由于承压水的流动性和补给作用，上覆表土层的载荷通过松散承压含水层均匀地作用于下部基岩上，开挖过程中基岩顶界面上的载荷基本保持恒定，松散承压含水层起到均匀传递载荷的作用；无松散承压含水层时，作用在基岩顶界面上的表土层载荷随煤层开挖而显著降低。
As a whole , the research work of this dissertation can be summarized as follows : ( 1 ) based on the porous media elastic unstable theory , the interfering well flow model of soft soil two - layer structure underground confined water is inferred , and consequently , the basic dewatering calculation method of soft - soil two - layer deep excavation dewatering is inferred 具体研究内容如下： (一)从弹性多孔介质渗流理论出发，推导出二元结构承压含水层群井干扰稳定流模型，进而导出软土地区二元结构地层深基坑降水的基本计算方法。
The water level of changjiang river under the dam will change from present condition in different seasons after the three gorge project is finished , which will affect dynamic change of groundwater in the middle and lower reaches district because changjiang river has cut in the confined water layer everywhere , however , it will have a great influence to the whole ecologic environmental condition , especially to the soil ' s evolvement in sihu district , jianghan plain , due to dynamic change of groundwater 三峡工程建成后坝下江段流量、水位的季节分布将发生改变，由于长江在中下游多处切穿了承压含水层，长江干流水位的季节改变必然会造成地下水动态的变化，地下水动态变化又会影响到整个中下游流域的生态环境状况，特别是长江中游平原湖区的涝渍土壤的发展演化。
In this thesis the geological and hydrogeological conditions of the area are systematically analyzed , and , from top to bottom the primary exploitation layers are divided into five layers in order : the second confined aquifer , the second aquitard , the third confined aquifer , the third aquitard , and the forth confined aquifer 本论文在系统分析该地区水文地质条件的基础上，将研究区主要开采层划分为五层，由上到下依次为：第一层为第承压含水层，第二层为第承压弱含水层，第三层为第承压含水层，第四层为第承压弱含水层，第五层为第承压含水层。
