煤层开采所引起的覆岩冒裂带的发育高度是判断其上覆含水层地下水、采空区积水和地表水能否涌入工作面的重要标志，准确预测冒裂带的发育高度对于预测和防治矿井水害具有重要的意义。陕北侏罗纪煤田多为浅埋煤层，具有基岩薄、松散层厚、开采规模大的特点，现有的冒裂带高度预计公式已不能很好的预测该区冒裂带的发育高度。本文以陕北侏罗纪煤田神南矿区张家峁煤矿、柠条塔煤矿、红柳林煤矿2-2、3-1、5-2主要可采煤层为研究对象，开展神南矿区煤层开采冒裂带发育高度预测方法研究，为浅埋煤层开采矿井水害预测防治提供依据。 在对研究区钻孔资料分析的基础上，根据各岩土层的空间分布特征，编制了矿区主要可采煤层2-2、3-1、5-2煤层厚度等值线图、煤层上覆基岩厚度等值线图、松散层厚度等值线图。将基岩按其物理力学性质与厚度分为坚硬型基岩、中硬型基岩和软塑型基岩三种类型，归纳总结了各主要可采煤层上覆基岩层的组合类型。应用FLAC3D数值模拟软件建立了30组210个神南矿区各主采煤层开采时冒裂带发育高度的数值模拟模型，并进行了煤层开采冒裂带高度的数值模拟。模拟结果分析表明：煤层采厚越大冒裂带发育越高，基岩硬度越大冒裂带发育越高，松散层越厚冒裂带发育越高；煤层采厚对冒裂带高度的影响最大，基岩硬度次之，松散层厚度最小，基岩组合类型影响程度随各基岩层厚度变化而不同。通过对冒裂带高度数值模拟结果的分析，拟合得到了薄、中厚、厚松散层及中硬为主覆岩和坚硬为主覆岩六种条件下以煤层采厚和基岩厚度为自变量的6个冒裂带高度预计公式，用于计算不同松散层厚度、不同基岩硬度及其组合条件下的冒裂带发育高度，为浅埋煤层区冒裂带发育高度预计提供了方法。

The height of the caving zone and fractured zone is an important symbol to determine if the water in bedrock, gob and the earth’s surface can flow into the mining area in coal mining, so there is significance to accurate calculate it to predict and prevent the mine water disaster. The mine in most part of Jurassic coalfield of the Northern Shaanxi is buried very shallow, which has the characteristics of thin bedrock ,thick soil and large scale mining, so the existing formulas for the caving zone and fractured zone are nor very suitable to this region. In this paper, the main coal seam 2-2, 3-1 and 5-2 in Zhang Jiamao minefield, Ning Tiaota minefield and Hong Liulin minefield of Southern Shenmu are chosen to be the object to study the method for the height of the caving zone and fractured zone, and provide a new basis for prediction and prevention of the mine water disaster in shallow buried coal mining. On the basis of analyzing the boreholes data in the study area and the spatial distribution characteristics of each layers, the seam thickness distribution contour map of the coal seams 2-2, 3-1 and 5-2, the bedrock thickness contour map and the soil thickness distribution contour map are made in the pepper. Each layer of the bedrock is differentiated into the brittle-type bedrock, the middle hard type bedrock and the soft hard type by the physical and mechanical properties and the thickness. Then the combination types of the bedrock over the main coal seams are inducted. The FLAC3D is used to build up the models to calculate the height of the caving zone and fractured zone, at last there are 30 groups and 210 models are build in this paper. The simulation results show that the height of the caving zone and fractured zone heightens with the chickening of the thickness of the coal seams, the bedrock and the soil. Among the types of factors, the mining height has the biggest affect, then the hardness of the bedrock, and the most least is the thickness of the soil. The impact of the bedrock assemblages is different with changing of the thickness of the bedrock. By analyzing the numerical results, 6 formulas are fitted to calculate the height of the caving zone and fractured zone under different thickness of soil, bedrock hardness and assemblages with the argument of the mining height and the thickness of bedrock. As a result, a new method is made to forecast the height of the caving zone and fractured zone for the shallow buried coal seams.