In harness of mine water disaster frequent southern China coalmines,mine integrated geophysical prospecting technology is usually used to detect karstic water bursting channels,in order to harness water disaster with measures of prevention,stopping,dewatering,drainage and damming.

Research purposes:In order to ascertain geology condition of karst water bursting disaster in the course of tunnel caving and give a technique foundation for the work of tunnel geology prediction.

On basis of the investigation on engineering geological conditions, the process, pattern and features of karst water burst, as well as the mechanism of the water burst, were studied by means of laboratory test, numerical modeling, theoretical analysis and in-situ tests.

By means of investigation on the engineering geological conditions,numerical modeling,and theoretical analysis,the mechanism of the karst water burst and its prevention countermeasures in Yuanliangshan tunnel are researched systematically.

The geological background of karst water outburst,karst distribution,seepage flow field of karst water and recharge source of karst water outburst in the long Huayingshan twin highway tunnel are systematically described.

In order to verify the passage of water bursting, used the harness scheme of " Put probe before stemming, combine with probe and stemming, and primary as stemming" , and verified the main passage of water bursting as that: " drill hole thro.

The initiation of fractures,propagation of fractures and formation of groundwater inrush pathway in coal seam floor were numerically obtained.

Based on the knowledge of faults configuration,the complexity of physico-mechanical parameters of faults,and the mechanism of groundwater inrush induced by faults,numerical tests with FEM are conducted to investigate the initiation of fractures,activation of faults and formation of groundwater inrush pathway with mechanical model for rock mass with faults in coal mining above confined aquifer.