Application And Study Of Comprehensive Mine Geophysical Prospecting In Detecting Water Abundance Of Floor Undulation In Coal Mine

The water inrush floor undulation in mine is one of the important factors that affect the safety production in coal mine, Exploration on subsurface structure of seam floor reasonably and effectively is the key to make water control measures. This paper takes Xinjing coal mine 80111 working face in Yangquan as the study object, considering study and analysing hydrogeological conditions near the working face by integrated geophysical prospecting means, and providing scientific basis for formulating measures for water control in coal mine.In view of the audio frequency perspective method has the advantages of accurate positioning about anomaly laterally, and the mine DC electrical method response significantly to distribution of anomaly vertically, this apaper considers exploring hydrogeological conditions near the bottom of the study area by integrated geophysical prospecting means.Drawing related geophysical maps base on processing and analysing raw data, according to contour map of apparent resistivity of coal seam floor, delineating abnormal areas individually combine geophysical prospecting results, explaining electrical variation characteristics in the direction of geophysical prospecting line combining geological data.Finally, through comparative analysis on results of this two methods, delineating the water rich condition of 80111 working face floor. The prospecting results indicates both audio-frequency electrical penetration and mine DC electrical method can suggest three abnormal areas, contrasting the abnormality location and area horizontally and vertically and Combinating konwing geological data to correct three abnormal location and areas.The study suggests that audio-frequency electrical penetration and mine DC electrical methods can effectively detect the face floor water yield property, however, single method has problems of multiple interpretations, and single profile or section is difficult to delineate abnormality area precisely, but integrated geophysical method can improve the accuracy of the interpretation result.