中文摘要：

针对我国华北东部煤矿井开采深度迅速增加，矿井岩溶水害日益加重的客观问题，文章分析讨论了深矿井开采的基本概念，通过统计分析，得出中国东部主要煤矿井目前开采深度达到600m左右且以12m／a左右的速度向深部延伸的变化趋势。从华北东部地区沉积古地理环境与地壳运动演化史方面分析了该地区厚层奥陶纪灰岩的形成及其后期岩溶发育过程。通过对研究区几个重点矿区揭露的奥陶系灰岩岩溶发育特征在穿层和顺层方向上随深度变化规律的分析，揭示出华北东部主要煤矿区奥陶系灰岩岩溶发育特征在垂向上具有弱-强-弱和顺层方向上随埋深具有由强到弱的变化规律。提出了华北东部煤矿深部开采将面临的岩溶水害问题及其防治水技术思路。

英文摘要：

Focused on the problems of karst water hazard with mining depth, the paper discusses the concept of deep coal mining. The present mining depth reaches about 600 m and increases 12 m per year in key coal mines of eastern North China on the basis of on statistical information. Karst process and karst results of Ordovieian lime- stone in eastern North China coal mine were analyzed from historical sedimentary environment and geological evaluation. The karst extent changed with the regularity of weak to strong to weak in vertical section and strong to weak along the same rock layer with depth in the coal mine region on the basis of observation and survey information. Some suggestions for deep coal mine water control are given,