Application of Ground Electrical Sounding Method on Detecting Water Abundance Zones in Awaiting Mining Face

To find out the water abundance zones and hydraulic conductivity of the 1905 mining face's roof, floor and H1 igneous rocks, according to the terrain and surface features, the symmetrical quadrupole electrical sounding method was used, and four parallel survey lines were arranged along the trend of the mining face. After inversion and analysis, four apparent resistivity isopleth maps were draw. Based on the elevation lines of 9# coal floor, the 3D figure of 9# coal roof, floor and H1 igneous rock apparent resistivity leveled layer slice were draw. Comprehensive analysis shows that the water abundance zones anomaly distribute, the relatively abundance zones located in the southwest and northeast, and have strong connection in vertical. Therefore, before working face advanced, drillings should be arranged to verification, or during the process of working face advancing, water advanced detection and prevention should be adopted to verify the low apparent resistance zones, to ensure the safety of working face during tunneling and mining.