Application of audio frequency electric penetrating technology in exploring water-rich roof of working face

Abstract

In order to find out the water-conducting structure of the roof strata under the loose aquifer in Wulanmulun Coal Mine, the audio electric penetrator was used to detect the characteristics of the electrical change of the roof strata, and the high-resolution audio electric penetrating perspective result was obtained, and then the distribution range and development characteristics of the water-conducting structure of the roof strata of the coal mining face were analyzed. The results show that the water content of loose aquifer and bedrock pore fracture aquifer overlying the roof of working face 12421 is relatively strong. The roof of 31411 working face is greatly affected by water accumulation in goaf of overlying working face. The verification results are consistent with each other, which indicates that the audio electric penetrating intersection geophysical prospecting method can accurately detect the water-conducting structure of roof strata in coal mining face.

Keywords

• unconsolidated aquifer
• audio frequency electric penetration method
• water conduction structure
• perspective results chart
• bedrock fissure water