【摘要】 在利用井下仰孔探测技术探测了三个矿井放顶煤开采覆岩破坏高度的基础上， 总结分析了导水裂隙带的形态特征及其最大高度发育过程， 所得结论对于进一步研究放顶煤开采覆岩破坏规律及安全生产具有重要的参考与实用价值．更多还原

【Abstract】 Based on the destruction height of the cover rocks by sublevel caving method in three coal mines with overhead?hole surveying technique,the authors have analyzed the morphological characteristics in the water conducted zone and its maximum height development process.The conclusion is valuable and practical for further researches of the destruction laws of the cover rocks by sublevel caving method and its safty production in coal mines.更多还原