王经明
Wang Jingming (Xi'an Branch;

• 1:煤炭科学研究总院西安分院!710054

摘要(Abstract)：

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。
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.

关键词(KeyWords)： 突水;机理;模拟;注水试验
water inrush;mechanism;simulation;water injection test

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作者(Authors): 王经明
Wang Jingming (Xi'an Branch;

参考文献(References)：

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• 2　王作宇,刘鸿泉. 承压水上采煤. 北京:煤炭出版社,1993
• 3　王成绪,邓中. 煤层开采过程中底板突水的弹塑性有限元模拟及初步分析. 北京大学学报,1990;(6):711～719
• 4　王经明,董书宁. 采矿断层扰动及水文地质意义. 煤炭学报,1997;(4):361～365

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