Hydrogeology characteristics analysis in the unconsolidated layers bottom of SunTuan coal mine

It is important implications to understand correctly hydrogeology characteristics of aquifers and aquifuge in unconsolidated layers bottom for reasonable retainment of safe coal rock pillar. In this paper, by means of drilling data statistics, X-ray diffraction(XRD), soil test and pumping test, aquifers and aquifuge Hydrogeology characteristics in Cenozoic unconsolidated layers bottom of SunTuan coal mine 102 mining area are comprehensively analyzed. It draw the conclusion that impermeability of “3rd-aquifuge” is good; “4th-aquifer” is weak permeable aquifer. These results have guiding significance for extending the upper extraction limit of mining area, and provide important protection for green exploitation of shallow seam covered with thin bedrock.