陕北侏罗纪煤田是一个正在大规模开发的地区。但该区地表为生态环境脆弱的毛乌素沙地，其下广泛分布着萨拉乌苏组含水层和侏罗纪煤炭资源，它们在垂向空间上构成了有机联系的生态环境—水资源—煤炭资源系统。目前的初步开采已经使该区域地层结构及生态环境遭到了严重的破坏，特别对开采区的水文地质条件产生了巨大的影响。鉴于陕北这一生态脆弱矿区特殊的突水溃砂灾害现象以及严重的缺水现状，必须系统地开展“保水采煤”技术方案的研究工作，实施“保水采煤”战略。 本文以榆神矿区榆树湾煤矿为研究对象，从井田的工程地质和水文地质资料入手，以实现水资源、生态环境保护与煤炭资源开发并举为目标，运用关键层理论、材料力学理论及变形分析方法从理论上对研究区煤炭开采造成的覆岩移动破坏规律进行了研究，并对导水裂隙带发育高度进行了预测；通过采煤方法的对比分析，得出研究区采用分层间歇式开采和限高开采相结合的方法可以达到“保水采煤”的目的；以煤矿的首采工作面为地质原型，建立数值模型，用RFPA-Flow数值模拟软件直观地模拟了首采面2-2煤在选取不同采高采动过程中覆岩垮落及导水裂隙带发育情况，得出研究区导水裂隙带最大发育高度约为25倍的采高，据此得到了研究区上分层不同开采厚度对应的潜水漏失程度分区图，为研究区分层开采合理采高的选取提供了依据；用FLAC3D数值模拟软件分析了首采面合理采高下布置不同工作面长度时，采动过程中覆岩导水裂隙带最大高度的变化情况，得出了工作面长度对导水裂隙带的影响，提出适合榆树湾煤矿首采工作面开采2-2煤科学的“保水采煤”方案应为采用分层限高开采的方法，开采高度为7m，工作面长度可为300m。 本文数值模拟方法和所选参数得到了实测结果和理论分析的验证，故所得结论具有一定的可靠性，并对研究区及相同地质条件下的其他区域“保水采煤”工作具有一定的指导意义，为陕北生态脆弱矿区实现水资源和生态环境保护与煤炭资源开采的“双赢”提供了理论和技术依据。

Jurassic coal field in Northern Shaanxi province is a region which is being developed on a large scale. But the surface is Mu Us Sandy Land with fragile ecological environment, the Salawusu aquifer and Jurassic coal resources are widely distributed below it. All of them constitute the organic connection system of ecological enviroment, water resources and coal resources in the vertical space. At present the preliminary mining has led to serious damage for strata structures and regional ecological environment, especially for hydrogeological conditions. In view of the disaster phenomena of water-sand inrush and serious water shortage situation in Northern Shanxi, technical scheme research of coal mining under water-containing condition must be carried out systematically. Taking YuShuwan coal mine in Yushen mining area as the research object, starting from engineering geological and hydrogeological data, in order to realize water resources, ecological environment protection and coal resources development, using the key strata theory, material mechanics theory and deformation analysis method, this paper studies the law of overburden movement and damage caused by coal mining, predicts the height of water flowing fractured zone. Through comparative analysis of mining method, the paper obtains using the method of combining batch-slice mining and limit-height mining method can reach the purpose of coal mining under water-containing condition. Taking the first face in coal mine for geological prototype, establishing numerical model, with RFPA-Flow visually simulating the process of overburden caving and the development of water flowing fractured zone coal in the different mining height of coal No.2-2, the maximum height of water flowing fractured zone is about 25 times of the mining height is obtained. In view of the above, the division graph of diving leakage corresponding to different mining thickness of high slice is got, it provides the basis for selecting the reasonable mining height of slice mining in study area. Using FLAC3D to analyze the maximum height variation of water flowing fractured zone under different length of working face, the effects to water flowing fractured zone is abtained. Limit-height slice mining method should be suitable for the coal No.2-2 of the frist face in order to realize coal mining under water-containing condition strategy, mining height is 7 meters and face length can be 300 meters. In this paper, numerical simulation method and selected parameters are verified by experimental results and theoretical analysis, therefore the conclusions has certain reliability and has certain guiding significance to coal mining under water-containing condition in the same geological conditions of other regions, it also provides theory and technical basis for water resource, ecological environment protection and coal mining in Northern Shaanxi with frague ecological environment.