3D comprehensive advance exploration and prevention technology of mine water-inrush

摘要

Mine water-inrush is one of the main geological disasters, which threat safe and efficient mining. Aiming at the complex geological condition and hydro geological condition of the second panel (panel II) of one mine, we use 3D comprehensive exploration and prevention technology find out the spatial form and distribution characteristics of geologic structures and goaf. The paper elaborate on implementation process of 3D seismic and underground drilling, analysis of the potential water-inrush place by pumping test and drilling coring test. Then we build a numerical simulation model of water-inrush place according to the exploration results. Using COMSOL MULTIPHYSICS software analysis of the water-inrush mechanism of the dangerous place and calculate the reasonable width of waterproof pillar is 50m that base on the theory of fluid-solid coupling which ensures safe and efficient mining. The research results show that there is a goaf in panel I where water-inrush risk exists. The gateway will happen transient and lagging water-inrush accident respectively when design 30m and 40m waterproof pillar between goaf and mining gateway; the plastic failure zone of waterproof pillar's roof and floor present asymmetric form, and the scope of plastic zone larger and failure time earlier in floor than the roof.