Advanced detection method based on protruding coal seam roadway

Abstract

The invention discloses an advanced detection method based on a protruding coal seam roadway. The method comprises a step of determining a preliminary seismic wave propagation velocity of a monitoringarea and performing roadway hammering on the monitoring area by using an active seismic source, a step of obtaining a seismic wave signal of active seismic source hammering and correcting an initialseismic wave propagation velocity according to the seismic wave signal to obtain a target seismic wave propagation velocity, a step of performing event detection on the seismic wave signal to obtain acoal-rock mass micro-fracture signal event, a step of performing artificial fine turning on the coal-rock mass micro-fracture signal event according to the target seismic wave propagation velocity toobtain a fine-tuning signal event, a step of performing positioning calculation on the fine-tuning signal event to obtain a fine-tuning signal event positioning result, a step of performing focal mechanism solution on the fine-tuning signal event to obtain a coal-rock mass micro-fracture formation mechanism, a step of performing double-difference imaging on the fine-tuning signal event and obtaining a velocity field by inversion, and a step of describing the distribution characteristics of a bad geological body in front of the roadway according to the fine-tuning signal event positioning result, the coal-rock mass micro-fracture formation mechanism and the velocity field.

Description

technical field [0001] The invention relates to the technical field of coal mine safety, in particular to an advanced detection method based on an outburst coal seam roadway. Background technique [0002] At present, there are drilling method, electromagnetic wave method and traditional seismic method for advanced detection of outburst coal seam roadway. The drilling method is to drill holes directly in front of the roadway to check the formation lithology, gas enrichment, structure, etc.; the electromagnetic wave method is to analyze the apparent resistivity of the surrounding rock based on the electrical properties of the rock such as resistivity, so as to judge the geological conditions near the measuring point. conditions; the traditional seismic method is based on seismic reflection wave information to analyze the roadway geological conditions. [0003] The detection area of ​​the drilling method is limited, and the equipment during the construction process is cumberso...

AI Technical Summary

Problems solved by technology

The cost of traditional 3D seismic is high, and the detection accuracy is reduced due to the influence of the surface environment and the buried depth of outburst coal seams, making it difficult to effectively detect geological anomalies in front of the roadway

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