ABSTRACT
Rapid excavation of coal mine roadways has become a hot topic, but there has been a lack of ideal pre-detection means for geological disasters in rapid excavation roadways. In order to achieve the goal of accurately and remotely detecting the low resistivity geological body in front of the excavation roadway in advance, a dynamic source and dynamic receiving transient electromagnetic detection device constructed in the directional borehole is adopted. The 0-704 m section of the fracturing borehole in a coal mine is detected by the push of the drilling rig and analyzed by three-dimensional imaging. The results show that the borehole transient electromagnetic detection technology is an organic combination and mutual supplement of mine geophysical exploration, drilling, and roadway rapid excavation technology. It can effectively identify the resistivity geological body within 30 m of the drilling hole diameter, and can be effectively applied to the geological prediction of rapid excavation roadway.
