承压水沿煤层底板递进导升突水机理的物理法研究

基金项目:

国家自然科学基金项目,批准号49872084

详细信息

PHYSICAL INVESTIGATION ON WATER INRUSH FROM COAL FLOOR INDUCED BY PRESSURE WATER PROGRESSIVE INTRUSION UP INTO PROTECTIVE AQUICLUDE

摘要: 完整底板和非完整底板的注水试验发现底板深处的耗水早于浅部,显示底板的破裂发生在采前,相似材料模拟具一定导升高度的底板在采动中的变化揭示了同样的规律。底板的原位应力测试发现承压水在采前出现了向上入侵的现象,二次应力给导升的发展提供了条件,递进导升是突水机理之一。
- 突水 /
- 机理 /
- 模拟 /
- 注水试验
Abstract: Not only water injections into both fracturing and intact coal floor strata but also the physical simulations about these two kinds of floor reveal that water drain in the upper part takes place earlier than the lower part in bore holes and rocks in deeper part of coal floor break or fracture ahead of working face.In-situ measurements verify the above by observing the confined water intruding up into the coal floor,the protective strata,before mining.This paper considers the secondary stress as the condition of presssure water up intrusion.The water progressive intrusion is one of the theories about mechanism of water inrush.
- water inrush /
- mechanism /
- simulation /
- water injection test