Research on Advanced Detection Technology with Parallel Electrical Method on Hole-Roadway
Roadway excavation is an important part in mine production,and it is also the forefront of mine water damage prevention.Effective advance prediction of geological anomalies in front of heading face is the basis for realizing safe roadway excavation.Considering the limitations of the existing roadway advanced detection methods in various aspects,combined with the advantages of drilling and geophysical exploration,the electrodes are arranged inside the borehole and roadway at the same time to measure the response characteristics of the geoelectric field in the front area of the head.A finite element three-dimensional numerical simulation of combined parallel electrical advanced detection of holes-roadway was carried out.Using a metal sphere to simulate a typical low-resistance anomaly in front of the head,the apparent resistivity value of the anomaly area is lower than 10 Ω·m.At the same time,the practical application was carried out in the air roadway of 1024 working face of Wugou Coal Mine.The results show that the apparent resistivity value in the advanced detection area is generally high,and there is an obvious low resistivity anomaly at 30～34m in front of the hole bottom.The apparent resistivity value is less than 10 Ω·m,and it is verified by actual exposure that it is wet and broken.
mine water damageadvanced detectionparallel resistivity method on Hole-Roadwaynumerical simulation
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