Research of seismic advanced detection technology in coal mines
This study utilizes a new generation of high-speed,high-resolution mine seismic instruments to conduct advanced detection re-search at a certain driving face.Due to geological anomalies such as goafs and faults that disrupt the integrity of coal seams,compared with raw coal(unmined coal seam),it exhibits different physical properties,mainly reflected in the density of the medium and the prop-agation speed of seismic waves.Seismic wave methods can be employed to study seismic exploration in coal mining based on this physi-cal phenomenon.The seismic advanced detection technology in coal mine roadways is achieved by utilizing the reflection waves genera-ted when the seismic waves excited inside the coal seam encounter abnormal reflectors(such as faults,collapsed columns,roadways,and goafs).By reflecting and positioning the reflection points of the reflection waves,the reflection surface of the abnormal reflectors can be obtained.Based on the direction of the reflection surface,the direction of the reflectors,especially the direction of the faults,can be de-termined.Using the principle of seismic advanced detection technology,linear Radon transform technology was used to separate the up and down traveling waves based on the negative apparent velocity characteristics of the reflection time distance curve,in order to extract reflection wave information for interpretation.The drilling verification of anomalies in front of the roadway indicates that the drilling re-sults are consistent with the geophysical exploration results.
万方数据
维普
