Research of permeability distribution with burial depth in the fractured rock mass in valley slope

Seepage calculation model of rock fracture under stress was deduced and the stress distribution of the valley slope was analyzed in this paper. On that basis, this paper analyzed the change rule of the permeability of rock mass with the burial depth on the complex stress condition with existence of unloading effect in the slope. The research showed the negative exponential relation between the permeability coefficient and the buried depth. In combination with the data of water pressure test in dam area of Baihetan hydropower station, using statistical analysis method, the negative exponential relation between unit water absorption and burial depth was putted forward which verified the relation between permeability of unloading rock mass and burial depth. The model which reflects the relation between the permeability of fractured rock mass in valley slope and the burial depth has reference significance for determining the slope rock mass permeability parameters. © 2013 CAFET-INNOVA TECHNICAL SOCIETY. All rights reserved.