Developed marble karst in Dahongshan mine has led to a great deal of water burst in mine shaft and rapid groundwatertablelowering, resulting in a large scale of surface subsidence.
The value of pore water pressure dissipation can be divided into two parts. One part is produced by vacuum degree and the other part by groundwatertablelowering.
In this paper, the regime regularity and evolutive trend ofgroundwater in Luoyang were discussed. The countermeasures of preventing water tableLowering were also advanced in this paper.