开采煤层底板“四带”划分理论与实践

Theory and Practice of Dividing Coal Mining Area Floor into Four-Zone

简述了国内外开采煤层底板突水机理的研究现状.基于损伤力学、断裂力学和矿山压力理论,在开采煤层底板"三带"划分理论基础上,提出了开采煤层底板"四带"划分理论,即开采煤层底板可以划分出 矿压破坏带; 新增损伤带; 原始损伤带; 原始导高带.对比分析了上述2种理论的共同点和不同点,推导出开采煤层底板"四带"理论中各带厚度的计算公式,给出了底板突水判别方法.结合肥城煤田开采煤层底板探测实例,说明开采煤层底板"四带"存在的客观性.

The present research situation of water-inrush from coal mining area floor was briefly introduced. A new theory of dividing coal mining area floor into four-zone is put forward, that is the mining area floor can be divided into broken zone caused by underground pressure; new damaged zone; original damaged zone and original water flowing zone. The formula to calculate the zone is induced and the method to judge whether the water-inrush from mining area floor happen or not is introduced. The validity to divide the mining area floor into four-zone is expressed with an example to survey the four-zone in mining area floor in Feicheng coalfield.