Application of semi-airborne transient electromagnetic data processing and interpretation in exploration of water hazards in Hesigula open-pit coal mine
In order to reduce the impact of underground water on coal mines and ensure the safety mining of the Hesigula open-pit coal mine in Xilingol League of Inner Mongolia,the authors use the semi-airborne transient electromagnetic method to conduct groundwater exploration of coal mines.Through the Occam inverse discrimination,the distribution of underground low-resistance electrical abnormalities is obtained,and comparison with the results of the nuclear magnetic and drilling results,the following main conclusions are obtained:①The water-bearing sand layers of the Quaternary loose rocks exhibit relatively high resistance,while the porosity and fractures within the clastic rock layers and coal seams of the Cretaceous Damoguaihe Formation demonstrate low electrical resistance.Conversely,the strata of the Damoguaihe Formation display relatively high resistance as a whole.②In the study are-a,underground water seepage channels are primarily distributed within the aquifers of porosity and fractures in the clastic rock layers of the Cretaceous strata.③Underground water-rich areas are mainly concentrated in the range from 840 m to 880 m.As the depth increases,the area of the water-rich zones gradually decreases.
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