【摘要】 覆岩中断层的存在提高了导水裂隙带的发育高度,因此采用间歇式采煤实现保水采煤时,覆岩中存在断层时工作面的推进距离要小于无断层时的情况.在以前研究的覆岩中无断层时不同覆岩厚度保水采煤工作面合理推进距离的基础上,应用相似模拟实验和数值模拟方法,研究浅埋煤层覆岩中存在断层时,应用间歇式保水采煤不同覆岩厚度的工作面合理推进距离,回归出了导水裂隙带高度随工作面推进距离而变化的经验公式,而且得出从断层上盘向下盘推进时工作面的合理推进距离小于反向推进时的结论,为陕北浅埋煤层保水采煤的实现提供技术支持.图8,表4,参9.更多还原

【Abstract】 The fault in overburden rock heighten the height of water flowing fractured zone,when adopting intermitten mining to achieve water-preserved mining ,the advancing distance of work face is less than the distance that overburden rock have not fault. Based on the before research of the reasonable advancing distance that the overburden rock have not fault for achiveing water-preserved mining,the reasonable advancing distance was researched in different thickness of overburden rock for achieving water-preserved mining when the overburden rock have fault,the method of similitude simulation and numerical simulation was applied,it educed the regressive formula of the relation between the water flowing fractured height and the distance of work face advancing,and it concluded that the advancing distance of work face when the work face advance from the upper wall of fault to the lower wall is less than the distance when the work face advanced reversely. The reserch provided a support for water-preserved mining in Shanbei shallowseam. 8figs.,4tabs.,9refs.更多还原