承压水上采煤的关键问题是煤层底板是否能有效地阻止底板高压水突出。底板突水与否取决于多方面影响,其中最重要的是煤层底板条件。本人以下三带理论为分析、评价底板抗突水能力提供了理论指导,依据“下三带”理论,以新集二矿1煤开采实例阐述了受承压水危胁煤层疏水降压措施及采煤方法,分析了其内在因素及处理方法,具有一定的实用性及经济性。 The key issue of confined water mining is whether the coal floor can effectively prevent the high pressure water from protruding from the floor. Whether the water inrush or not depends on many factors, the most important of which is the condition of coal floor. The following three-band theory provides the theoretical guidance for the analysis and evaluation of the water inrush capability of the floor. Based on the “three belts” theory, Measures and mining methods, analysis of its internal factors and treatment methods, with a certain degree of practicality and economy.