Resistivity Tomography and Calculation of Stability in Surveying Excavated-Empty-Area and Inclined Shaft Tunnels in Coal Mine

The excavated-empty-area and the inclined shaft trunnels were surveyed with Z-D resistivity tomography in YueJin Power plant with 2×50MW/year of Yima Coal Mining Industry Group in Henan Province. The places of the excavated-empty-area and it’s influence range, and the inclined shaft tunnels were determined. Z-D images of the resistivity tomography show generally anomalous high-resistivity closed circles, which suggests that there is no water in the excavated-empty-area and in the inclined shaft tunnels. Should there be water, the anomaly would manifest as low-resistivity closed circles. Moreover the stability and safety of the inclined shaft tunnels are analyzed and calculated based on the parameters of geological structures, stratigraphic configuration and ground buildings. Our studied results indicate that ① the inclined shaft tunnels have strong influence on the main monitored-control building, and the building is instable and unsafe must be reinforced; ② the main workshop does not be affected and is stable.