Technology of Network Parallel Electric Method Applied to Detection of Water Ponding in Mining Goaf

With the mining depth increased in the mine, the water ponding in the mining goaf would be major hidden danger affected to the mine coal safety product ion and the delineation of the water ponding boundary would be the key to effectively prevent and control the water inrush from the goaf. Based on establishment on the boundary model of water ponding, the network parallel electric method was applied to the continued dynamic monitoring and measuring the goaf in mining face No7130 before the water drainage and during the water drainage process. Response features of water bearing anomalous body between the seepage field and the geoelectric fi eld were obtained and were applied to establish the variation relationship between the water ponding boundary and the resistivity in order to delineate and analyze the water ponding scope in the goaf of the mine.The results showed that the water ponding boundary with an effective watery coefficient of 0.122 6 and the water ponding b oundary delineated with resistivity parameters measured by the network parallel electric method would have a good consistency and would format the resistivity section at different stage during the dynamic monitoring and measuring.