为了实现鄂尔多斯盆地侏罗纪煤田受顶板水害威胁的煤炭资源安全开采，基于侏罗纪煤炭资源赋存条件、顶板含水层特征、顶板水害分布范围与防控难题，对离层水害、薄基岩溃水溃沙、厚层砂岩水害和烧变岩水害4种典型顶板水害的形成机理、判识方法、主控因素和防控技术进行了系统研究。侏罗纪煤田离层水害发生的地质条件为砂泥岩互层，泥岩隔水层厚度是控制离层水害发生的主控因素，研发了离层水体精准定位探放技术，实现了离层水害判别与防控技术的定量化;导水沙裂隙带是薄基岩溃水溃沙的主控因素，构建了基于导水沙裂隙带与基岩厚度对应关系的溃水溃沙危险性评价体系，发明了含水松散沙体高效注浆技术，有效避免了薄基岩溃水溃沙的发生;发现了厚层砂岩含水层在垂向上的非均质特性，揭示了递进渗流充水模式，提出了“适当波及，主动防控”的厚层砂岩水害防控新理念，解放了大量受厚层砂岩水害的煤炭资源;揭示了烧变岩的“边界富水”效应，将烧变岩完整断面分为直接露头区、中部埋藏区和火烧边界区，并构建了烧变岩不同断面注浆材料选择准则，提出了双位双向孔序优选引流注浆帷幕技术，显著减少了烧变岩对工作面的补给水量，同时实现了采煤保水。通过将典型顶板水害防控技术在鄂尔多斯盆地侏罗纪煤田的推广应用，有效遏制了顶板水害事故的发生。

In order to achieve a safe mining of coal resources under the threat of roof water disasters in Jurassic coal field of Ordos basin,based on the existence conditions of Jurassic coal resources,the characteristics of roof aquifers,the distritution range and prevention & control problem of water disaster from roof aquifer,the formation mechanism,iden- tification method,main control factors,prevention and control techniques of four typical roof water disasters (bed sepa- ration water disaster,water and sand inrush with thin bedrock,thick sandstone water disaster,and burnt stone water disaster) were studied systematically. In the Jurassic coal field,the geological condition for the bed separation water disaster is interlayer with sandstone and mudstone,the thickness of the water-proof mudstone is the main controlling factor. The precise positioning and drainage technology of bed separation water were researched and developed. The quantification of the identification and prevention & control technology of bed separation water disaster was developed. Water-sand fracture zone is the main controlling factor of water and sand inrush with thin bedrock. A risk evaluation system of water and sand inrush based on the relationship between water-sand fracture zone and bedrock thickness was constructed. The dfficient grouting technology of water-bearing loose sand body was invented,which effectively preven- ted the occurrence of water and sand inrush with thin bedrock. The haterogeneity of thick sandstone aquifer in vertical direction was discovered,and the progressive seepage water filling mode was revealed. A new concept of water disaster prevention and control of thick sandstone water disaster was put forward,which was “appropriately swept and actively controlled”. A large number of coal resources threatened by thick sandstone water disaster was liberated. The “bound- ary of burnt rock with abundant water” effect was revealed. The complete section of the burnt rock is divided into di- rect outcropping area,central burial area and burnting boundary area. The seletion criterion of grouting material for dif- ferent sections of burnt rock was constructed. The optimal drainage grouting curtain technique with double-positon bidi- rectional borehole sequence was put forward,which can significantly reduce the water supply to the working face from burnt rock and the water conservation can be realized with coal mining. Though the application of the prevention and control technology of roof water disaster to the Jurassic coal field in Ordos basin,the occurrence of roof water disaster has been restrained effectively,and the coal resources have been produced efficiently,safely and in a green way. At the same time,the theory and technology of mine water disaster prevetion and control have been greatly enriched.