Measurement analysis of existing water channel conducing mine flood

The purposes of this paper are to find out existing water channel conducing mine flood around shaft,thus to make base for the correct understanding of the mechanism of shaft fracture.In this paper,the mechanism of the compression deformation of the soil around shaft and the relation of the relative displacement between soil and outside shaft-wall are analyzed.The procreant process of the upward additional force acting on outside shaft-wall and the variable law of the "Neutral level" are researched.Utilizing the buoyant principium in physics,this paper triumphantly explains the procreant process of additional force and a series of especial phenomenon in this field,for example that lacking of bottom water-bearing layer is not the reason of no rupture of shaft-wall and the water layer drop of bottom water-bearing layer not always makes shaft-wall rupture.The observed data of some typical examples are analyzed and provided to verify the theory in present paper.The research result in this paper will play an important role in the research of the rupture mechanism and rupture forecast of shaft-wall.