【摘要】 对黄淮矿区古风化壳进行了详尽分析和简易分带，重点研究了开采煤上方风化带的工程地质特性，探讨了临界风化带开采缩小防水煤柱的机理。更多还原

【Abstract】 Through detailed research on the data of fossil weathered residuum in Huang and Huai coal mining area,the zone of highweathering has been divided simply.The author studies mainly on the characteristics of engineering geology about the zone of weathering overlying coal seam,the mechanism of cutting waterproof coal pillar and provides the reference for the coal mine with similar condition in cutting waterproof coal pillar.更多还原